/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:42:34,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:42:34,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:42:34,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:42:34,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:42:34,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:42:34,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:42:34,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:42:34,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:42:34,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:42:34,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:42:34,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 05:42:34,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:42:34,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:42:34,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:42:34,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 05:42:34,650 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:42:34,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:42:34,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:42:34,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:42:34,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:42:34,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:42:34,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:42:34,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:42:34,653 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:42:34,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:42:34,654 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:42:34,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:42:34,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:42:34,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:42:34,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:42:34,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:42:34,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:42:34,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:42:34,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:42:34,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:42:34,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:42:34,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:42:34,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:42:34,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:42:34,656 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:42:34,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:42:34,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:42:34,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:42:34,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:42:34,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:42:34,926 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:42:34,927 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:42:34,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2022-01-18 05:42:34,928 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2022-01-18 05:42:34,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:42:34,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:42:34,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:42:34,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:42:34,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:42:34,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,982 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:42:34,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:42:34,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:42:34,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:42:34,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:42:34,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:34,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:35,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:42:35,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:42:35,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:42:35,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:42:35,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/1) ... [2022-01-18 05:42:35,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:42:35,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:35,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 05:42:35,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 05:42:35,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:42:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:42:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:42:35,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:42:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:42:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:42:35,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:42:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:42:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:42:35,064 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:42:35,104 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:42:35,105 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:42:35,214 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:42:35,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:42:35,229 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:42:35,233 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:42:35 BoogieIcfgContainer [2022-01-18 05:42:35,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:42:35,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:42:35,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:42:35,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:42:35,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:34" (1/2) ... [2022-01-18 05:42:35,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74993829 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:42:35, skipping insertion in model container [2022-01-18 05:42:35,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:42:35" (2/2) ... [2022-01-18 05:42:35,241 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2022-01-18 05:42:35,245 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:42:35,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:42:35,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:42:35,245 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:42:35,293 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 05:42:35,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:42:35,358 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 05:42:35,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 05:42:35,368 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-01-18 05:42:35,398 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:42:35,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:35,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:35,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2028772855, now seen corresponding path program 1 times [2022-01-18 05:42:35,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:35,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658577388] [2022-01-18 05:42:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:35,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:35,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:35,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658577388] [2022-01-18 05:42:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658577388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:42:35,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:42:35,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:42:35,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112091518] [2022-01-18 05:42:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:42:35,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:42:35,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:42:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:42:35,632 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:35,671 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2022-01-18 05:42:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:42:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 05:42:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:35,681 INFO L225 Difference]: With dead ends: 58 [2022-01-18 05:42:35,681 INFO L226 Difference]: Without dead ends: 43 [2022-01-18 05:42:35,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:42:35,686 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:42:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-18 05:42:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-01-18 05:42:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 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) [2022-01-18 05:42:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2022-01-18 05:42:35,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2022-01-18 05:42:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:35,713 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2022-01-18 05:42:35,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2022-01-18 05:42:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:42:35,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:35,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:35,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:42:35,715 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272181, now seen corresponding path program 1 times [2022-01-18 05:42:35,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:35,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766078228] [2022-01-18 05:42:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:35,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:35,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766078228] [2022-01-18 05:42:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766078228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171398206] [2022-01-18 05:42:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:35,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:35,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:35,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:42:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:42:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:36,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:36,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171398206] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:36,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 05:42:36,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-01-18 05:42:36,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650112501] [2022-01-18 05:42:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:42:36,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:42:36,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:42:36,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:42:36,264 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:36,417 INFO L93 Difference]: Finished difference Result 76 states and 127 transitions. [2022-01-18 05:42:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:42:36,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:42:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:36,424 INFO L225 Difference]: With dead ends: 76 [2022-01-18 05:42:36,424 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 05:42:36,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:42:36,430 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:36,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 05:42:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2022-01-18 05:42:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2022-01-18 05:42:36,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2022-01-18 05:42:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:36,444 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2022-01-18 05:42:36,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2022-01-18 05:42:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:42:36,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:36,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:36,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:36,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:36,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 987674481, now seen corresponding path program 2 times [2022-01-18 05:42:36,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804418846] [2022-01-18 05:42:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:36,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:36,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804418846] [2022-01-18 05:42:36,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804418846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:42:36,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:42:36,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:42:36,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84349570] [2022-01-18 05:42:36,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:42:36,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:42:36,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:42:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:42:36,718 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:36,779 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2022-01-18 05:42:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:42:36,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:42:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:36,781 INFO L225 Difference]: With dead ends: 51 [2022-01-18 05:42:36,781 INFO L226 Difference]: Without dead ends: 49 [2022-01-18 05:42:36,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:42:36,782 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:36,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 27 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:42:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-18 05:42:36,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-01-18 05:42:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2022-01-18 05:42:36,788 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2022-01-18 05:42:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:36,788 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2022-01-18 05:42:36,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2022-01-18 05:42:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:42:36,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:36,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:36,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:42:36,790 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 859553737, now seen corresponding path program 1 times [2022-01-18 05:42:36,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:36,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876465950] [2022-01-18 05:42:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:36,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:36,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:36,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876465950] [2022-01-18 05:42:36,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876465950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992447491] [2022-01-18 05:42:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:36,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:36,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:36,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:42:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:42:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:37,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992447491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:37,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:37,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 05:42:37,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746010] [2022-01-18 05:42:37,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:42:37,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:42:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:42:37,140 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:37,172 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2022-01-18 05:42:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:42:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:42:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:37,177 INFO L225 Difference]: With dead ends: 97 [2022-01-18 05:42:37,177 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 05:42:37,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:42:37,186 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:37,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:42:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 05:42:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-01-18 05:42:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2022-01-18 05:42:37,192 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2022-01-18 05:42:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:37,193 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2022-01-18 05:42:37,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2022-01-18 05:42:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:42:37,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:37,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:37,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:37,394 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,SelfDestructingSolverStorable3 [2022-01-18 05:42:37,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash -611520693, now seen corresponding path program 2 times [2022-01-18 05:42:37,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:37,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048950360] [2022-01-18 05:42:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:37,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:37,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048950360] [2022-01-18 05:42:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048950360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297089430] [2022-01-18 05:42:37,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:42:37,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:37,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:37,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:42:37,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:42:37,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:37,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:42:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:37,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:37,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297089430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:37,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:37,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 05:42:37,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709016673] [2022-01-18 05:42:37,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:37,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:42:37,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:42:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:42:37,744 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:38,158 INFO L93 Difference]: Finished difference Result 184 states and 330 transitions. [2022-01-18 05:42:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:42:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 21 [2022-01-18 05:42:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:38,160 INFO L225 Difference]: With dead ends: 184 [2022-01-18 05:42:38,160 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 05:42:38,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:42:38,162 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 186 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:38,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 94 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:42:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 05:42:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 68. [2022-01-18 05:42:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2022-01-18 05:42:38,177 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2022-01-18 05:42:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:38,177 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2022-01-18 05:42:38,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2022-01-18 05:42:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:42:38,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:38,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:38,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 05:42:38,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:38,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1341886603, now seen corresponding path program 3 times [2022-01-18 05:42:38,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:38,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270078356] [2022-01-18 05:42:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:38,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:38,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:38,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270078356] [2022-01-18 05:42:38,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270078356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:38,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162841346] [2022-01-18 05:42:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:42:38,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:38,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:38,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:42:38,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:42:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:42:38,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:38,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:38,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162841346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:38,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:38,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 05:42:38,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081023795] [2022-01-18 05:42:38,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:38,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:42:38,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:42:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:42:38,724 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-01-18 05:42:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:39,013 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2022-01-18 05:42:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:42:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:42:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:39,014 INFO L225 Difference]: With dead ends: 146 [2022-01-18 05:42:39,014 INFO L226 Difference]: Without dead ends: 142 [2022-01-18 05:42:39,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:42:39,016 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:39,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 54 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-18 05:42:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2022-01-18 05:42:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2022-01-18 05:42:39,042 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2022-01-18 05:42:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2022-01-18 05:42:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-01-18 05:42:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2022-01-18 05:42:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:42:39,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:39,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:39,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:39,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:39,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -183772023, now seen corresponding path program 4 times [2022-01-18 05:42:39,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:39,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982143262] [2022-01-18 05:42:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:39,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:39,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:39,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982143262] [2022-01-18 05:42:39,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982143262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:39,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428499709] [2022-01-18 05:42:39,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:42:39,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:39,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:39,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:39,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:42:39,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:42:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 05:42:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:39,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:39,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428499709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:39,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:39,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-01-18 05:42:39,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992503577] [2022-01-18 05:42:39,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:39,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:42:39,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:42:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:42:39,533 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:39,566 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2022-01-18 05:42:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:42:39,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:42:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:39,568 INFO L225 Difference]: With dead ends: 163 [2022-01-18 05:42:39,569 INFO L226 Difference]: Without dead ends: 136 [2022-01-18 05:42:39,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:42:39,573 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:39,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:42:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-18 05:42:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2022-01-18 05:42:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2022-01-18 05:42:39,583 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2022-01-18 05:42:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:39,583 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2022-01-18 05:42:39,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2022-01-18 05:42:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:42:39,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:39,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:39,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:39,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:39,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1437238517, now seen corresponding path program 5 times [2022-01-18 05:42:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:39,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36295525] [2022-01-18 05:42:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:39,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:39,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36295525] [2022-01-18 05:42:39,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36295525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428984296] [2022-01-18 05:42:39,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:42:39,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:39,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:39,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:42:39,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:42:39,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 05:42:39,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:40,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428984296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:40,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:40,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:42:40,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307424078] [2022-01-18 05:42:40,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:42:40,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:42:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:42:40,209 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:40,847 INFO L93 Difference]: Finished difference Result 384 states and 727 transitions. [2022-01-18 05:42:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:42:40,847 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:42:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:40,849 INFO L225 Difference]: With dead ends: 384 [2022-01-18 05:42:40,849 INFO L226 Difference]: Without dead ends: 348 [2022-01-18 05:42:40,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:42:40,851 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:40,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 105 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:42:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-18 05:42:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 93. [2022-01-18 05:42:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2022-01-18 05:42:40,858 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2022-01-18 05:42:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2022-01-18 05:42:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2022-01-18 05:42:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:42:40,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:40,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:40,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:41,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:41,080 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2140448121, now seen corresponding path program 6 times [2022-01-18 05:42:41,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:41,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483937252] [2022-01-18 05:42:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:41,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:41,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483937252] [2022-01-18 05:42:41,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483937252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306776469] [2022-01-18 05:42:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:42:41,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:41,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:41,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:42:41,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 05:42:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 05:42:41,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:41,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:41,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306776469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:41,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:41,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 05:42:41,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008761359] [2022-01-18 05:42:41,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:41,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:42:41,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:42:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:42:41,463 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:41,932 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2022-01-18 05:42:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:42:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:42:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:41,934 INFO L225 Difference]: With dead ends: 240 [2022-01-18 05:42:41,934 INFO L226 Difference]: Without dead ends: 236 [2022-01-18 05:42:41,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:42:41,936 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:41,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 57 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-18 05:42:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2022-01-18 05:42:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2022-01-18 05:42:41,941 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2022-01-18 05:42:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:41,943 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2022-01-18 05:42:41,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2022-01-18 05:42:41,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:42:41,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:41,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:41,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:42,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:42,167 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash 870348873, now seen corresponding path program 7 times [2022-01-18 05:42:42,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:42,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710827779] [2022-01-18 05:42:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:42,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:42,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710827779] [2022-01-18 05:42:42,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710827779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914221842] [2022-01-18 05:42:42,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:42:42,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:42,236 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:42,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:42:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:42:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:42,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914221842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:42,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:42,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-18 05:42:42,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105501663] [2022-01-18 05:42:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:42,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:42:42,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:42,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:42:42,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:42:42,468 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2022-01-18 05:42:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:42,525 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2022-01-18 05:42:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:42:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 [2022-01-18 05:42:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:42,527 INFO L225 Difference]: With dead ends: 222 [2022-01-18 05:42:42,527 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 05:42:42,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:42:42,527 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:42,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 05:42:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2022-01-18 05:42:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2022-01-18 05:42:42,533 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2022-01-18 05:42:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:42,534 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2022-01-18 05:42:42,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2022-01-18 05:42:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2022-01-18 05:42:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:42:42,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:42,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:42,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:42,751 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,SelfDestructingSolverStorable9 [2022-01-18 05:42:42,752 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -699202101, now seen corresponding path program 8 times [2022-01-18 05:42:42,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328095023] [2022-01-18 05:42:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:42,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:42,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328095023] [2022-01-18 05:42:42,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328095023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639670345] [2022-01-18 05:42:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:42:42,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:42,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:42,870 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:42,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:42:42,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:42:42,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:42,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 05:42:42,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:43,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:43,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639670345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:43,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:43,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-01-18 05:42:43,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579921805] [2022-01-18 05:42:43,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:43,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:42:43,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:43,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:42:43,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:42:43,239 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:44,234 INFO L93 Difference]: Finished difference Result 614 states and 1173 transitions. [2022-01-18 05:42:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:42:44,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:42:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:44,237 INFO L225 Difference]: With dead ends: 614 [2022-01-18 05:42:44,237 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 05:42:44,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:42:44,240 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 311 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:44,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 135 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:42:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 05:42:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 115. [2022-01-18 05:42:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2022-01-18 05:42:44,249 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2022-01-18 05:42:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:44,250 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2022-01-18 05:42:44,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2022-01-18 05:42:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:42:44,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:44,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:44,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:44,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:44,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1726457475, now seen corresponding path program 9 times [2022-01-18 05:42:44,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:44,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534184110] [2022-01-18 05:42:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:44,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:44,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534184110] [2022-01-18 05:42:44,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534184110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:44,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12559576] [2022-01-18 05:42:44,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:42:44,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:44,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:44,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:44,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:42:44,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 05:42:44,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:44,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 05:42:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:44,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:44,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12559576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:45,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:45,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 05:42:45,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986733063] [2022-01-18 05:42:45,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:45,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:42:45,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:42:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:42:45,001 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:45,690 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2022-01-18 05:42:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:42:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:42:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:45,692 INFO L225 Difference]: With dead ends: 352 [2022-01-18 05:42:45,692 INFO L226 Difference]: Without dead ends: 348 [2022-01-18 05:42:45,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:42:45,694 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 279 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:45,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 73 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:42:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-18 05:42:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2022-01-18 05:42:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2022-01-18 05:42:45,700 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2022-01-18 05:42:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:45,700 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2022-01-18 05:42:45,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2022-01-18 05:42:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:42:45,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:45,714 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:45,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:45,923 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,SelfDestructingSolverStorable11 [2022-01-18 05:42:45,923 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1453740809, now seen corresponding path program 10 times [2022-01-18 05:42:45,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:45,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605763920] [2022-01-18 05:42:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:45,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:46,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605763920] [2022-01-18 05:42:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605763920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507923966] [2022-01-18 05:42:46,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:42:46,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:46,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:46,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:46,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:42:46,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:42:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:42:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:46,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:46,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507923966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:46,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:46,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-01-18 05:42:46,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367736337] [2022-01-18 05:42:46,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:46,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:42:46,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:42:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:42:46,278 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:46,359 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2022-01-18 05:42:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:42:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 [2022-01-18 05:42:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:46,361 INFO L225 Difference]: With dead ends: 281 [2022-01-18 05:42:46,361 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 05:42:46,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:42:46,362 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:46,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 199 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:46,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 05:42:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2022-01-18 05:42:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2022-01-18 05:42:46,368 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2022-01-18 05:42:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2022-01-18 05:42:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2022-01-18 05:42:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:42:46,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:46,369 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:46,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 05:42:46,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 05:42:46,579 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash 976375691, now seen corresponding path program 11 times [2022-01-18 05:42:46,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:46,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782909343] [2022-01-18 05:42:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:46,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:46,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:46,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782909343] [2022-01-18 05:42:46,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782909343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:46,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998568269] [2022-01-18 05:42:46,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:42:46,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:46,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:46,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:46,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:42:46,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 05:42:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:42:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:47,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:47,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998568269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:47,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:47,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:42:47,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529625065] [2022-01-18 05:42:47,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:47,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:42:47,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:42:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:42:47,195 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:48,595 INFO L93 Difference]: Finished difference Result 890 states and 1705 transitions. [2022-01-18 05:42:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 05:42:48,595 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:42:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:48,598 INFO L225 Difference]: With dead ends: 890 [2022-01-18 05:42:48,598 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 05:42:48,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 05:42:48,601 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 397 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:48,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 150 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:42:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 05:42:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 137. [2022-01-18 05:42:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2022-01-18 05:42:48,609 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2022-01-18 05:42:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:48,609 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2022-01-18 05:42:48,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2022-01-18 05:42:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:42:48,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:48,610 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:48,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:48,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 05:42:48,823 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:48,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1583838335, now seen corresponding path program 12 times [2022-01-18 05:42:48,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:48,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122300838] [2022-01-18 05:42:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:48,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:48,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:48,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122300838] [2022-01-18 05:42:48,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122300838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:48,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621732023] [2022-01-18 05:42:48,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:42:48,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:48,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:48,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:42:48,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 05:42:48,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:42:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:49,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:49,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621732023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:49,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:49,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-01-18 05:42:49,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604413316] [2022-01-18 05:42:49,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:49,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:42:49,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:42:49,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:42:49,487 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:50,508 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2022-01-18 05:42:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:42:50,508 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:42:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:50,510 INFO L225 Difference]: With dead ends: 486 [2022-01-18 05:42:50,510 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 05:42:50,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:42:50,512 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 354 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:50,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 76 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:42:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 05:42:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2022-01-18 05:42:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2022-01-18 05:42:50,518 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2022-01-18 05:42:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:50,518 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2022-01-18 05:42:50,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2022-01-18 05:42:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 05:42:50,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:50,519 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:50,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:50,719 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,SelfDestructingSolverStorable14 [2022-01-18 05:42:50,719 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1071262921, now seen corresponding path program 13 times [2022-01-18 05:42:50,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:50,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256482846] [2022-01-18 05:42:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:50,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:50,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256482846] [2022-01-18 05:42:50,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256482846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460111039] [2022-01-18 05:42:50,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:42:50,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:50,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:50,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:50,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:42:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:42:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:50,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460111039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:51,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:51,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 05:42:51,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890578431] [2022-01-18 05:42:51,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:42:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:42:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:42:51,070 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:51,172 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2022-01-18 05:42:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:42:51,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 05:42:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:51,174 INFO L225 Difference]: With dead ends: 340 [2022-01-18 05:42:51,174 INFO L226 Difference]: Without dead ends: 295 [2022-01-18 05:42:51,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:42:51,175 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 47 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:51,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 279 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:51,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-18 05:42:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2022-01-18 05:42:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2022-01-18 05:42:51,181 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2022-01-18 05:42:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:51,181 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2022-01-18 05:42:51,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2022-01-18 05:42:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:42:51,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:51,182 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:51,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:51,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:51,393 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1278220363, now seen corresponding path program 14 times [2022-01-18 05:42:51,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:51,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211418868] [2022-01-18 05:42:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:51,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:51,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211418868] [2022-01-18 05:42:51,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211418868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151634098] [2022-01-18 05:42:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:42:51,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:51,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:51,552 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:51,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:42:51,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:42:51,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:42:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:51,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:52,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151634098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:52,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:52,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-01-18 05:42:52,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487432974] [2022-01-18 05:42:52,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:52,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:42:52,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:42:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:42:52,125 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:54,135 INFO L93 Difference]: Finished difference Result 1206 states and 2313 transitions. [2022-01-18 05:42:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:42:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-01-18 05:42:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:54,140 INFO L225 Difference]: With dead ends: 1206 [2022-01-18 05:42:54,140 INFO L226 Difference]: Without dead ends: 957 [2022-01-18 05:42:54,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 05:42:54,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 447 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:54,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 230 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:42:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-18 05:42:54,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 159. [2022-01-18 05:42:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2022-01-18 05:42:54,153 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2022-01-18 05:42:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:54,153 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2022-01-18 05:42:54,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2022-01-18 05:42:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:42:54,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:54,154 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:54,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 05:42:54,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 05:42:54,377 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1281475707, now seen corresponding path program 15 times [2022-01-18 05:42:54,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327221454] [2022-01-18 05:42:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:54,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:54,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327221454] [2022-01-18 05:42:54,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327221454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148858958] [2022-01-18 05:42:54,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:42:54,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:54,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:54,480 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:54,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:42:54,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 05:42:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:42:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:54,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:55,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148858958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:55,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:55,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-01-18 05:42:55,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081772828] [2022-01-18 05:42:55,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:55,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:42:55,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:42:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:42:55,064 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:56,447 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2022-01-18 05:42:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 05:42:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:42:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:56,450 INFO L225 Difference]: With dead ends: 642 [2022-01-18 05:42:56,450 INFO L226 Difference]: Without dead ends: 638 [2022-01-18 05:42:56,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 05:42:56,453 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 457 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:56,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 90 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:42:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-18 05:42:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2022-01-18 05:42:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2022-01-18 05:42:56,458 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2022-01-18 05:42:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:56,459 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2022-01-18 05:42:56,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2022-01-18 05:42:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:42:56,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:56,459 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:56,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:56,679 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,SelfDestructingSolverStorable17 [2022-01-18 05:42:56,679 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash -913783415, now seen corresponding path program 16 times [2022-01-18 05:42:56,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019295514] [2022-01-18 05:42:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:56,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:56,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019295514] [2022-01-18 05:42:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019295514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098100559] [2022-01-18 05:42:56,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:42:56,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:56,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:56,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:42:56,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:42:56,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:56,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 05:42:56,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:56,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:57,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098100559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:57,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:57,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-18 05:42:57,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288080242] [2022-01-18 05:42:57,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:57,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:42:57,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:42:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:42:57,149 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) 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) [2022-01-18 05:42:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:42:57,265 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2022-01-18 05:42:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:42:57,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) 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 39 [2022-01-18 05:42:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:42:57,266 INFO L225 Difference]: With dead ends: 399 [2022-01-18 05:42:57,266 INFO L226 Difference]: Without dead ends: 348 [2022-01-18 05:42:57,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:42:57,267 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 56 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:42:57,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 373 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:42:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-18 05:42:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2022-01-18 05:42:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:42:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2022-01-18 05:42:57,272 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2022-01-18 05:42:57,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:42:57,273 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2022-01-18 05:42:57,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) 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) [2022-01-18 05:42:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2022-01-18 05:42:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 05:42:57,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:42:57,273 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:42:57,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 05:42:57,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:57,487 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:42:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:42:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1709629429, now seen corresponding path program 17 times [2022-01-18 05:42:57,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:42:57,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250912391] [2022-01-18 05:42:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:42:57,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:42:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:42:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:57,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:42:57,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250912391] [2022-01-18 05:42:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250912391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:42:57,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355452747] [2022-01-18 05:42:57,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:42:57,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:42:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:42:57,664 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:42:57,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:42:57,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 05:42:57,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:42:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:42:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:42:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:58,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:42:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:42:58,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355452747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:42:58,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:42:58,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-01-18 05:42:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158876684] [2022-01-18 05:42:58,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:42:58,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 05:42:58,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:42:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 05:42:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:42:58,316 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:00,931 INFO L93 Difference]: Finished difference Result 1562 states and 2997 transitions. [2022-01-18 05:43:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 05:43:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 05:43:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:00,935 INFO L225 Difference]: With dead ends: 1562 [2022-01-18 05:43:00,935 INFO L226 Difference]: Without dead ends: 1217 [2022-01-18 05:43:00,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7192 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 05:43:00,938 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 473 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:00,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 225 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:43:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-01-18 05:43:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 181. [2022-01-18 05:43:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2022-01-18 05:43:00,947 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2022-01-18 05:43:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:00,947 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2022-01-18 05:43:00,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2022-01-18 05:43:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 05:43:00,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:00,948 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:01,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:01,165 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash 523397513, now seen corresponding path program 18 times [2022-01-18 05:43:01,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:01,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559467783] [2022-01-18 05:43:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:01,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:01,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559467783] [2022-01-18 05:43:01,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559467783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6289625] [2022-01-18 05:43:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:43:01,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:01,295 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:01,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:43:01,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 05:43:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:43:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:01,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:01,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6289625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:01,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:01,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-01-18 05:43:01,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007160837] [2022-01-18 05:43:01,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:01,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 05:43:01,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 05:43:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:43:01,960 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:03,675 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2022-01-18 05:43:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 05:43:03,676 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 05:43:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:03,678 INFO L225 Difference]: With dead ends: 820 [2022-01-18 05:43:03,678 INFO L226 Difference]: Without dead ends: 816 [2022-01-18 05:43:03,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 05:43:03,680 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 410 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:03,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 108 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:43:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-18 05:43:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2022-01-18 05:43:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2022-01-18 05:43:03,685 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2022-01-18 05:43:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:03,685 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2022-01-18 05:43:03,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2022-01-18 05:43:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 05:43:03,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:03,686 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:03,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 05:43:03,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:03,908 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:03,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1095687497, now seen corresponding path program 19 times [2022-01-18 05:43:03,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:03,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201384142] [2022-01-18 05:43:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:03,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:04,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201384142] [2022-01-18 05:43:04,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201384142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631286336] [2022-01-18 05:43:04,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:43:04,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:04,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:04,017 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:04,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:43:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:43:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:04,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:04,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631286336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:04,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:04,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-01-18 05:43:04,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073370179] [2022-01-18 05:43:04,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:04,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:43:04,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:04,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:43:04,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:43:04,359 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:04,493 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2022-01-18 05:43:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:43:04,494 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 05:43:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:04,495 INFO L225 Difference]: With dead ends: 458 [2022-01-18 05:43:04,495 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 05:43:04,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:43:04,496 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:04,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 481 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:43:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 05:43:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2022-01-18 05:43:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2022-01-18 05:43:04,502 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2022-01-18 05:43:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:04,502 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2022-01-18 05:43:04,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2022-01-18 05:43:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 05:43:04,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:04,503 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:04,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:04,720 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,SelfDestructingSolverStorable21 [2022-01-18 05:43:04,721 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1162487499, now seen corresponding path program 20 times [2022-01-18 05:43:04,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160974372] [2022-01-18 05:43:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:04,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:04,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:04,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160974372] [2022-01-18 05:43:04,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160974372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:04,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459031388] [2022-01-18 05:43:04,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:43:04,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:04,923 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:04,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:43:04,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:43:04,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:43:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:05,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:05,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459031388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:05,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:05,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2022-01-18 05:43:05,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301573974] [2022-01-18 05:43:05,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:05,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:43:05,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:43:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:43:05,622 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:09,000 INFO L93 Difference]: Finished difference Result 1958 states and 3757 transitions. [2022-01-18 05:43:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-18 05:43:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 05:43:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:09,005 INFO L225 Difference]: With dead ends: 1958 [2022-01-18 05:43:09,005 INFO L226 Difference]: Without dead ends: 1505 [2022-01-18 05:43:09,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7852, Invalid=24368, Unknown=0, NotChecked=0, Total=32220 [2022-01-18 05:43:09,008 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 739 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:09,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 230 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:43:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2022-01-18 05:43:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 203. [2022-01-18 05:43:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2022-01-18 05:43:09,018 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2022-01-18 05:43:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:09,018 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2022-01-18 05:43:09,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2022-01-18 05:43:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 05:43:09,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:09,018 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:09,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 05:43:09,219 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,SelfDestructingSolverStorable22 [2022-01-18 05:43:09,219 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash 702420365, now seen corresponding path program 21 times [2022-01-18 05:43:09,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:09,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310627767] [2022-01-18 05:43:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:09,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:09,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310627767] [2022-01-18 05:43:09,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310627767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:09,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636399096] [2022-01-18 05:43:09,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:43:09,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:09,353 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:09,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:43:09,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 05:43:09,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:43:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:09,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:10,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636399096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:10,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:10,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 44 [2022-01-18 05:43:10,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71149701] [2022-01-18 05:43:10,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:10,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 05:43:10,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 05:43:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:43:10,151 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:12,422 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2022-01-18 05:43:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 05:43:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 05:43:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:12,425 INFO L225 Difference]: With dead ends: 1020 [2022-01-18 05:43:12,425 INFO L226 Difference]: Without dead ends: 1016 [2022-01-18 05:43:12,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6775 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5439, Invalid=14867, Unknown=0, NotChecked=0, Total=20306 [2022-01-18 05:43:12,427 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 469 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:12,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 132 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:43:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-18 05:43:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2022-01-18 05:43:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2022-01-18 05:43:12,433 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2022-01-18 05:43:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:12,433 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2022-01-18 05:43:12,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2022-01-18 05:43:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 05:43:12,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:12,434 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:12,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:12,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:12,647 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash -463916023, now seen corresponding path program 22 times [2022-01-18 05:43:12,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356568512] [2022-01-18 05:43:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:12,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:12,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356568512] [2022-01-18 05:43:12,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356568512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9482821] [2022-01-18 05:43:12,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:43:12,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:12,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:12,782 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:12,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:43:12,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:43:12,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:12,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:43:12,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:12,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:13,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9482821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:13,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:13,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-01-18 05:43:13,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445326193] [2022-01-18 05:43:13,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:13,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:43:13,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:43:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:43:13,092 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:13,269 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2022-01-18 05:43:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:43:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 05:43:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:13,271 INFO L225 Difference]: With dead ends: 517 [2022-01-18 05:43:13,271 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 05:43:13,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:43:13,272 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 74 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:13,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 603 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:43:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 05:43:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2022-01-18 05:43:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2022-01-18 05:43:13,278 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2022-01-18 05:43:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:13,278 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2022-01-18 05:43:13,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2022-01-18 05:43:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 05:43:13,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:13,279 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:13,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 05:43:13,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:13,499 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2125458571, now seen corresponding path program 23 times [2022-01-18 05:43:13,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:13,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067351355] [2022-01-18 05:43:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:13,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:13,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067351355] [2022-01-18 05:43:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067351355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222510991] [2022-01-18 05:43:13,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:43:13,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:13,718 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:13,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:43:13,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 05:43:13,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:43:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:14,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:14,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222510991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:14,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:14,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-01-18 05:43:14,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345833337] [2022-01-18 05:43:14,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:14,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 05:43:14,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 05:43:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:43:14,463 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:18,933 INFO L93 Difference]: Finished difference Result 2394 states and 4593 transitions. [2022-01-18 05:43:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 05:43:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 05:43:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:18,938 INFO L225 Difference]: With dead ends: 2394 [2022-01-18 05:43:18,938 INFO L226 Difference]: Without dead ends: 1821 [2022-01-18 05:43:18,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16656 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11178, Invalid=34832, Unknown=0, NotChecked=0, Total=46010 [2022-01-18 05:43:18,942 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 707 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:18,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 295 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:43:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-01-18 05:43:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 225. [2022-01-18 05:43:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2022-01-18 05:43:18,951 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2022-01-18 05:43:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:18,951 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2022-01-18 05:43:18,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2022-01-18 05:43:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 05:43:18,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:18,952 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:18,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 05:43:19,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 05:43:19,162 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash -827703407, now seen corresponding path program 24 times [2022-01-18 05:43:19,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196443061] [2022-01-18 05:43:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:19,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:19,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196443061] [2022-01-18 05:43:19,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196443061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418458356] [2022-01-18 05:43:19,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:43:19,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:19,324 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:19,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:43:19,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 05:43:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:43:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:19,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:20,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418458356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:20,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:20,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 49 [2022-01-18 05:43:20,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251986566] [2022-01-18 05:43:20,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:20,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 05:43:20,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 05:43:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:43:20,216 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:23,046 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2022-01-18 05:43:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-18 05:43:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 05:43:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:23,050 INFO L225 Difference]: With dead ends: 1242 [2022-01-18 05:43:23,050 INFO L226 Difference]: Without dead ends: 1238 [2022-01-18 05:43:23,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9854 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7546, Invalid=20846, Unknown=0, NotChecked=0, Total=28392 [2022-01-18 05:43:23,053 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 612 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:23,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 136 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:43:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-01-18 05:43:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2022-01-18 05:43:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2022-01-18 05:43:23,060 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2022-01-18 05:43:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:23,060 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2022-01-18 05:43:23,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2022-01-18 05:43:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 05:43:23,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:23,061 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:23,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:23,283 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,SelfDestructingSolverStorable26 [2022-01-18 05:43:23,283 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1533315529, now seen corresponding path program 25 times [2022-01-18 05:43:23,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:23,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613187315] [2022-01-18 05:43:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:23,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:23,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613187315] [2022-01-18 05:43:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613187315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581286395] [2022-01-18 05:43:23,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:43:23,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:23,412 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:23,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:43:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:23,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 05:43:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:23,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:23,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581286395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:23,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:23,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-01-18 05:43:23,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556941655] [2022-01-18 05:43:23,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:23,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:43:23,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:43:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:43:23,779 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:23,987 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2022-01-18 05:43:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:43:23,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 51 [2022-01-18 05:43:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:23,989 INFO L225 Difference]: With dead ends: 576 [2022-01-18 05:43:23,989 INFO L226 Difference]: Without dead ends: 507 [2022-01-18 05:43:23,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:43:23,990 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 83 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:23,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 739 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:43:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-18 05:43:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2022-01-18 05:43:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2022-01-18 05:43:23,996 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2022-01-18 05:43:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:23,997 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2022-01-18 05:43:23,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2022-01-18 05:43:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 05:43:23,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:23,998 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:24,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:24,219 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,SelfDestructingSolverStorable27 [2022-01-18 05:43:24,219 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash 46608715, now seen corresponding path program 26 times [2022-01-18 05:43:24,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:24,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597699244] [2022-01-18 05:43:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:24,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:24,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597699244] [2022-01-18 05:43:24,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597699244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462711214] [2022-01-18 05:43:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:43:24,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:24,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:24,472 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:24,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:43:24,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:43:24,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:24,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:43:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:25,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462711214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:25,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:25,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2022-01-18 05:43:25,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519145730] [2022-01-18 05:43:25,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:25,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-18 05:43:25,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-18 05:43:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 05:43:25,318 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:31,021 INFO L93 Difference]: Finished difference Result 2870 states and 5505 transitions. [2022-01-18 05:43:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-01-18 05:43:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 05:43:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:31,027 INFO L225 Difference]: With dead ends: 2870 [2022-01-18 05:43:31,027 INFO L226 Difference]: Without dead ends: 2165 [2022-01-18 05:43:31,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23988 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=15464, Invalid=48292, Unknown=0, NotChecked=0, Total=63756 [2022-01-18 05:43:31,031 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 818 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:31,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 306 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:43:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2022-01-18 05:43:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 247. [2022-01-18 05:43:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2022-01-18 05:43:31,043 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2022-01-18 05:43:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:31,044 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2022-01-18 05:43:31,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2022-01-18 05:43:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 05:43:31,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:31,045 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:31,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 05:43:31,257 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,SelfDestructingSolverStorable28 [2022-01-18 05:43:31,257 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2116020117, now seen corresponding path program 27 times [2022-01-18 05:43:31,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:31,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049797616] [2022-01-18 05:43:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:31,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:31,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:31,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049797616] [2022-01-18 05:43:31,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049797616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:31,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540460605] [2022-01-18 05:43:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:43:31,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:31,444 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:31,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 05:43:31,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-18 05:43:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:43:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:32,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:32,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540460605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:32,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:32,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 54 [2022-01-18 05:43:32,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264027265] [2022-01-18 05:43:32,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:32,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-18 05:43:32,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-18 05:43:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=2230, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:43:32,446 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:35,983 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2022-01-18 05:43:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-18 05:43:35,984 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 05:43:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:35,987 INFO L225 Difference]: With dead ends: 1486 [2022-01-18 05:43:35,987 INFO L226 Difference]: Without dead ends: 1482 [2022-01-18 05:43:35,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13887 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10199, Invalid=28413, Unknown=0, NotChecked=0, Total=38612 [2022-01-18 05:43:35,989 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 711 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:35,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 141 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:43:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-01-18 05:43:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2022-01-18 05:43:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2022-01-18 05:43:35,996 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2022-01-18 05:43:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:35,996 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2022-01-18 05:43:35,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2022-01-18 05:43:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 05:43:35,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:35,997 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:36,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 05:43:36,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:36,197 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash 918396553, now seen corresponding path program 28 times [2022-01-18 05:43:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461004663] [2022-01-18 05:43:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:36,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:36,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461004663] [2022-01-18 05:43:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461004663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970023413] [2022-01-18 05:43:36,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:43:36,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:36,371 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:36,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 05:43:36,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:43:36,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:43:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:36,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:36,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970023413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:36,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:36,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-01-18 05:43:36,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830478837] [2022-01-18 05:43:36,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:43:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:43:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:43:36,742 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:36,986 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2022-01-18 05:43:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:43:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 05:43:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:36,988 INFO L225 Difference]: With dead ends: 635 [2022-01-18 05:43:36,988 INFO L226 Difference]: Without dead ends: 560 [2022-01-18 05:43:36,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:43:36,989 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 92 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:36,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 889 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:43:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-18 05:43:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2022-01-18 05:43:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2022-01-18 05:43:36,996 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2022-01-18 05:43:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:36,996 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2022-01-18 05:43:36,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2022-01-18 05:43:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 05:43:36,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:36,997 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:37,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:37,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:37,216 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1784892149, now seen corresponding path program 29 times [2022-01-18 05:43:37,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188692568] [2022-01-18 05:43:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:37,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:37,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188692568] [2022-01-18 05:43:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188692568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970203141] [2022-01-18 05:43:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:43:37,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:37,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:37,544 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:37,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 05:43:37,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 05:43:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:43:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:38,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970203141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:38,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:38,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-01-18 05:43:38,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721643835] [2022-01-18 05:43:38,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:38,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-18 05:43:38,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-18 05:43:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2978, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:43:38,575 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:45,788 INFO L93 Difference]: Finished difference Result 3386 states and 6493 transitions. [2022-01-18 05:43:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-01-18 05:43:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 05:43:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:45,796 INFO L225 Difference]: With dead ends: 3386 [2022-01-18 05:43:45,796 INFO L226 Difference]: Without dead ends: 2537 [2022-01-18 05:43:45,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33558 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=20880, Invalid=65262, Unknown=0, NotChecked=0, Total=86142 [2022-01-18 05:43:45,800 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 904 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:45,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 357 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 05:43:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-01-18 05:43:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 269. [2022-01-18 05:43:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2022-01-18 05:43:45,813 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2022-01-18 05:43:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:45,813 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2022-01-18 05:43:45,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2022-01-18 05:43:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 05:43:45,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:45,814 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:45,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 05:43:46,022 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,SelfDestructingSolverStorable31 [2022-01-18 05:43:46,022 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash -565703271, now seen corresponding path program 30 times [2022-01-18 05:43:46,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250268293] [2022-01-18 05:43:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:46,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:46,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250268293] [2022-01-18 05:43:46,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250268293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392746525] [2022-01-18 05:43:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:43:46,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:46,228 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 05:43:46,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-18 05:43:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:43:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:46,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392746525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:47,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:47,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 25] total 59 [2022-01-18 05:43:47,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170769442] [2022-01-18 05:43:47,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:47,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-18 05:43:47,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-18 05:43:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2666, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:43:47,388 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 59 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:51,826 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2022-01-18 05:43:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-18 05:43:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 59 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 05:43:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:51,830 INFO L225 Difference]: With dead ends: 1752 [2022-01-18 05:43:51,830 INFO L226 Difference]: Without dead ends: 1748 [2022-01-18 05:43:51,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19057 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=13483, Invalid=37819, Unknown=0, NotChecked=0, Total=51302 [2022-01-18 05:43:51,834 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 868 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:51,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 170 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:43:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2022-01-18 05:43:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2022-01-18 05:43:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2022-01-18 05:43:51,844 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2022-01-18 05:43:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:51,844 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2022-01-18 05:43:51,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 59 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2022-01-18 05:43:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 05:43:51,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:51,845 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:51,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 05:43:52,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:52,067 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1782657609, now seen corresponding path program 31 times [2022-01-18 05:43:52,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226292203] [2022-01-18 05:43:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:52,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:52,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226292203] [2022-01-18 05:43:52,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226292203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186564078] [2022-01-18 05:43:52,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:43:52,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:52,252 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 05:43:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:43:52,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:52,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186564078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:52,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-01-18 05:43:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714503431] [2022-01-18 05:43:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:43:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:43:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:43:52,747 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:43:53,046 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2022-01-18 05:43:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:43:53,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 05:43:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:43:53,047 INFO L225 Difference]: With dead ends: 694 [2022-01-18 05:43:53,048 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 05:43:53,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:43:53,048 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 101 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:43:53,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1053 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:43:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 05:43:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2022-01-18 05:43:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2022-01-18 05:43:53,054 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2022-01-18 05:43:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:43:53,055 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2022-01-18 05:43:53,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:43:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2022-01-18 05:43:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 05:43:53,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:43:53,056 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:43:53,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 05:43:53,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:53,267 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:43:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:43:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2127378379, now seen corresponding path program 32 times [2022-01-18 05:43:53,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:43:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122919065] [2022-01-18 05:43:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:43:53,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:43:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:43:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:53,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:43:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122919065] [2022-01-18 05:43:53,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122919065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:43:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93792852] [2022-01-18 05:43:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:43:53,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:43:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:43:53,588 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:43:53,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 05:43:53,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:43:53,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:43:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 05:43:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:43:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:54,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:43:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:43:54,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93792852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:43:54,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:43:54,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2022-01-18 05:43:54,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386692041] [2022-01-18 05:43:54,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:43:54,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-18 05:43:54,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:43:54,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-18 05:43:54,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3499, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:43:54,631 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:03,736 INFO L93 Difference]: Finished difference Result 3942 states and 7557 transitions. [2022-01-18 05:44:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-01-18 05:44:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 05:44:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:03,740 INFO L225 Difference]: With dead ends: 3942 [2022-01-18 05:44:03,740 INFO L226 Difference]: Without dead ends: 2937 [2022-01-18 05:44:03,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45785 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=27610, Invalid=86296, Unknown=0, NotChecked=0, Total=113906 [2022-01-18 05:44:03,743 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1116 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:03,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 398 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:44:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2022-01-18 05:44:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 291. [2022-01-18 05:44:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2022-01-18 05:44:03,757 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2022-01-18 05:44:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:03,757 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2022-01-18 05:44:03,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2022-01-18 05:44:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 05:44:03,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:03,758 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:03,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 05:44:03,964 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,SelfDestructingSolverStorable34 [2022-01-18 05:44:03,964 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1968459363, now seen corresponding path program 33 times [2022-01-18 05:44:03,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:03,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509712543] [2022-01-18 05:44:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:03,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:04,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509712543] [2022-01-18 05:44:04,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509712543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081566537] [2022-01-18 05:44:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:44:04,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:04,192 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:04,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 05:44:04,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-18 05:44:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:44:04,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 05:44:04,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:04,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:05,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081566537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:05,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:05,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 64 [2022-01-18 05:44:05,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610062688] [2022-01-18 05:44:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:05,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-18 05:44:05,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-18 05:44:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:44:05,485 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:10,907 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2022-01-18 05:44:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-01-18 05:44:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 05:44:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:10,911 INFO L225 Difference]: With dead ends: 2040 [2022-01-18 05:44:10,911 INFO L226 Difference]: Without dead ends: 2036 [2022-01-18 05:44:10,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25563 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=17489, Invalid=49333, Unknown=0, NotChecked=0, Total=66822 [2022-01-18 05:44:10,916 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 768 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:10,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 167 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:44:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-01-18 05:44:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2022-01-18 05:44:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2022-01-18 05:44:10,924 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2022-01-18 05:44:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:10,925 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2022-01-18 05:44:10,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2022-01-18 05:44:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 05:44:10,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:10,926 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:10,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 05:44:11,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 05:44:11,140 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -916716279, now seen corresponding path program 34 times [2022-01-18 05:44:11,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111458119] [2022-01-18 05:44:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:11,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:11,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111458119] [2022-01-18 05:44:11,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111458119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172612276] [2022-01-18 05:44:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:44:11,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:11,342 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:11,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 05:44:11,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:44:11,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:44:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 05:44:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:11,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:11,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172612276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:11,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:11,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-01-18 05:44:11,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068636762] [2022-01-18 05:44:11,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:11,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:44:11,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:44:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:44:11,764 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:12,098 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2022-01-18 05:44:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:44:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 05:44:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:12,100 INFO L225 Difference]: With dead ends: 753 [2022-01-18 05:44:12,100 INFO L226 Difference]: Without dead ends: 666 [2022-01-18 05:44:12,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:44:12,100 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 110 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:12,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1231 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:44:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-18 05:44:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2022-01-18 05:44:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2022-01-18 05:44:12,107 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2022-01-18 05:44:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:12,107 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2022-01-18 05:44:12,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2022-01-18 05:44:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-18 05:44:12,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:12,108 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:12,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 05:44:12,311 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,SelfDestructingSolverStorable36 [2022-01-18 05:44:12,311 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 92633483, now seen corresponding path program 35 times [2022-01-18 05:44:12,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055611718] [2022-01-18 05:44:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:12,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:12,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055611718] [2022-01-18 05:44:12,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055611718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177044373] [2022-01-18 05:44:12,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:44:12,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:12,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:12,670 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:12,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 05:44:12,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 05:44:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:44:12,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:44:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:13,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177044373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:13,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:13,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-01-18 05:44:13,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440740208] [2022-01-18 05:44:13,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:13,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-18 05:44:13,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:13,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-18 05:44:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:44:13,894 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:24,950 INFO L93 Difference]: Finished difference Result 4538 states and 8697 transitions. [2022-01-18 05:44:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2022-01-18 05:44:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-18 05:44:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:24,955 INFO L225 Difference]: With dead ends: 4538 [2022-01-18 05:44:24,955 INFO L226 Difference]: Without dead ends: 3365 [2022-01-18 05:44:24,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61134 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=35852, Invalid=111988, Unknown=0, NotChecked=0, Total=147840 [2022-01-18 05:44:24,963 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1179 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:24,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 443 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 05:44:24,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-01-18 05:44:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 313. [2022-01-18 05:44:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2022-01-18 05:44:25,014 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2022-01-18 05:44:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:25,014 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2022-01-18 05:44:25,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2022-01-18 05:44:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-18 05:44:25,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:25,015 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:25,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 05:44:25,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:25,230 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash -732703839, now seen corresponding path program 36 times [2022-01-18 05:44:25,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:25,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604078008] [2022-01-18 05:44:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:25,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:25,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:25,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604078008] [2022-01-18 05:44:25,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604078008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:25,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935178074] [2022-01-18 05:44:25,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:44:25,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:25,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:25,484 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:25,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 05:44:25,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-01-18 05:44:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:44:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:44:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:26,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:26,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935178074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:26,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:26,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 29] total 69 [2022-01-18 05:44:26,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508316847] [2022-01-18 05:44:26,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:26,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-18 05:44:26,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-18 05:44:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=3655, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:44:26,959 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 70 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 69 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:33,469 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2022-01-18 05:44:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-18 05:44:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 69 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-18 05:44:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:33,474 INFO L225 Difference]: With dead ends: 2350 [2022-01-18 05:44:33,474 INFO L226 Difference]: Without dead ends: 2346 [2022-01-18 05:44:33,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33621 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=22314, Invalid=63242, Unknown=0, NotChecked=0, Total=85556 [2022-01-18 05:44:33,479 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1022 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:33,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 172 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:44:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2022-01-18 05:44:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2022-01-18 05:44:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2022-01-18 05:44:33,492 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2022-01-18 05:44:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:33,492 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2022-01-18 05:44:33,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 69 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2022-01-18 05:44:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-18 05:44:33,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:33,493 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:33,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 05:44:33,707 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,SelfDestructingSolverStorable38 [2022-01-18 05:44:33,707 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2096441655, now seen corresponding path program 37 times [2022-01-18 05:44:33,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:33,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109449723] [2022-01-18 05:44:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:33,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:33,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109449723] [2022-01-18 05:44:33,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109449723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173651851] [2022-01-18 05:44:33,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:44:33,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:33,918 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:33,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 05:44:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-18 05:44:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:34,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:34,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173651851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:34,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:34,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-01-18 05:44:34,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176653796] [2022-01-18 05:44:34,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:34,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:44:34,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:44:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:44:34,387 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:34,786 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2022-01-18 05:44:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:44:34,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-18 05:44:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:34,788 INFO L225 Difference]: With dead ends: 812 [2022-01-18 05:44:34,789 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 05:44:34,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:44:34,789 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 119 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:34,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1423 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:44:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 05:44:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2022-01-18 05:44:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2022-01-18 05:44:34,798 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2022-01-18 05:44:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:34,799 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2022-01-18 05:44:34,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2022-01-18 05:44:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-18 05:44:34,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:34,800 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:34,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 05:44:35,022 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,SelfDestructingSolverStorable39 [2022-01-18 05:44:35,022 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -327009717, now seen corresponding path program 38 times [2022-01-18 05:44:35,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:35,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421766030] [2022-01-18 05:44:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:35,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:35,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421766030] [2022-01-18 05:44:35,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421766030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911977627] [2022-01-18 05:44:35,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:44:35,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:35,426 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:35,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 05:44:35,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:44:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:44:35,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:44:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:36,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911977627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:36,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:36,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2022-01-18 05:44:36,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795424703] [2022-01-18 05:44:36,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-18 05:44:36,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-18 05:44:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:44:36,816 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:44:50,710 INFO L93 Difference]: Finished difference Result 5174 states and 9913 transitions. [2022-01-18 05:44:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-01-18 05:44:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-18 05:44:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:44:50,716 INFO L225 Difference]: With dead ends: 5174 [2022-01-18 05:44:50,716 INFO L226 Difference]: Without dead ends: 3821 [2022-01-18 05:44:50,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80099 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=45818, Invalid=142972, Unknown=0, NotChecked=0, Total=188790 [2022-01-18 05:44:50,724 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1026 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:44:50,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 491 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 05:44:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2022-01-18 05:44:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 335. [2022-01-18 05:44:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2022-01-18 05:44:50,744 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2022-01-18 05:44:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:44:50,744 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2022-01-18 05:44:50,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:44:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2022-01-18 05:44:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-18 05:44:50,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:44:50,745 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:44:50,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 05:44:50,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:50,959 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:44:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:44:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2117504091, now seen corresponding path program 39 times [2022-01-18 05:44:50,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:44:50,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155229202] [2022-01-18 05:44:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:44:50,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:44:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:44:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:51,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:44:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155229202] [2022-01-18 05:44:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155229202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:44:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156539160] [2022-01-18 05:44:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:44:51,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:44:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:44:51,228 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:44:51,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 05:44:51,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-01-18 05:44:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:44:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:44:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:44:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:52,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:44:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:44:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156539160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:44:52,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:44:52,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31, 31] total 74 [2022-01-18 05:44:52,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535687340] [2022-01-18 05:44:52,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:44:52,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-18 05:44:52,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:44:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-18 05:44:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=4208, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:44:52,860 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 75 states, 75 states have (on average 2.466666666666667) internal successors, (185), 74 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:45:00,649 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2022-01-18 05:45:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-01-18 05:45:00,650 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.466666666666667) internal successors, (185), 74 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-18 05:45:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:45:00,652 INFO L225 Difference]: With dead ends: 2682 [2022-01-18 05:45:00,652 INFO L226 Difference]: Without dead ends: 2678 [2022-01-18 05:45:00,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43463 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=28061, Invalid=79851, Unknown=0, NotChecked=0, Total=107912 [2022-01-18 05:45:00,656 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 949 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:45:00,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 197 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 05:45:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-01-18 05:45:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2022-01-18 05:45:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2022-01-18 05:45:00,666 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2022-01-18 05:45:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:45:00,666 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2022-01-18 05:45:00,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.466666666666667) internal successors, (185), 74 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2022-01-18 05:45:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-18 05:45:00,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:45:00,667 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:45:00,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 05:45:00,867 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,SelfDestructingSolverStorable41 [2022-01-18 05:45:00,867 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:45:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:45:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1646631031, now seen corresponding path program 40 times [2022-01-18 05:45:00,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:45:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642713511] [2022-01-18 05:45:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:45:00,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:45:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:01,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:45:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642713511] [2022-01-18 05:45:01,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642713511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:45:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944849855] [2022-01-18 05:45:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:45:01,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:45:01,111 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:45:01,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 05:45:01,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:45:01,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:45:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 05:45:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:45:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:45:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:01,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944849855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:45:01,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:45:01,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-01-18 05:45:01,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856095822] [2022-01-18 05:45:01,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:45:01,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:45:01,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:45:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:45:01,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:45:01,595 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:45:02,033 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2022-01-18 05:45:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:45:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-18 05:45:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:45:02,035 INFO L225 Difference]: With dead ends: 871 [2022-01-18 05:45:02,035 INFO L226 Difference]: Without dead ends: 772 [2022-01-18 05:45:02,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:45:02,035 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 128 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:45:02,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1629 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:45:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-18 05:45:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2022-01-18 05:45:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2022-01-18 05:45:02,043 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2022-01-18 05:45:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:45:02,044 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2022-01-18 05:45:02,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2022-01-18 05:45:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-18 05:45:02,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:45:02,045 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:45:02,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 05:45:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:02,263 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:45:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:45:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash -300926453, now seen corresponding path program 41 times [2022-01-18 05:45:02,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:45:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507285519] [2022-01-18 05:45:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:45:02,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:45:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:02,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:45:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507285519] [2022-01-18 05:45:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507285519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:45:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880130338] [2022-01-18 05:45:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:45:02,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:45:02,777 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:45:02,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 05:45:02,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-01-18 05:45:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:45:02,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:45:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:45:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:03,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:45:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880130338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:45:04,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:45:04,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2022-01-18 05:45:04,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584281655] [2022-01-18 05:45:04,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:45:04,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-18 05:45:04,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:45:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-18 05:45:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=5314, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:45:04,218 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:45:20,863 INFO L93 Difference]: Finished difference Result 5850 states and 11205 transitions. [2022-01-18 05:45:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 411 states. [2022-01-18 05:45:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-18 05:45:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:45:20,871 INFO L225 Difference]: With dead ends: 5850 [2022-01-18 05:45:20,872 INFO L226 Difference]: Without dead ends: 4305 [2022-01-18 05:45:20,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103220 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=57734, Invalid=179922, Unknown=0, NotChecked=0, Total=237656 [2022-01-18 05:45:20,881 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1381 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3691 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 3691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:45:20,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 572 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 3691 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:45:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2022-01-18 05:45:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 357. [2022-01-18 05:45:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2022-01-18 05:45:20,936 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2022-01-18 05:45:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:45:20,936 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2022-01-18 05:45:20,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2022-01-18 05:45:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-18 05:45:20,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:45:20,937 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:45:20,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 05:45:21,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:21,147 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:45:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:45:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1894411863, now seen corresponding path program 42 times [2022-01-18 05:45:21,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:45:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626514741] [2022-01-18 05:45:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:45:21,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:45:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:21,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:45:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626514741] [2022-01-18 05:45:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626514741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:45:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623005607] [2022-01-18 05:45:21,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:45:21,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:21,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:45:21,393 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:45:21,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 05:45:21,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-01-18 05:45:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:45:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:45:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:45:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:22,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:45:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:23,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623005607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:45:23,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:45:23,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33, 33] total 79 [2022-01-18 05:45:23,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129558725] [2022-01-18 05:45:23,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:45:23,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-18 05:45:23,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:45:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-18 05:45:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4800, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 05:45:23,168 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 80 states, 80 states have (on average 2.4625) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:45:32,607 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2022-01-18 05:45:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-01-18 05:45:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.4625) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-18 05:45:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:45:32,610 INFO L225 Difference]: With dead ends: 3036 [2022-01-18 05:45:32,610 INFO L226 Difference]: Without dead ends: 3032 [2022-01-18 05:45:32,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55338 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=34839, Invalid=99483, Unknown=0, NotChecked=0, Total=134322 [2022-01-18 05:45:32,617 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1032 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:45:32,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 222 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 05:45:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-01-18 05:45:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2022-01-18 05:45:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2022-01-18 05:45:32,631 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2022-01-18 05:45:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:45:32,631 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2022-01-18 05:45:32,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.4625) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2022-01-18 05:45:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-18 05:45:32,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:45:32,632 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:45:32,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 05:45:32,839 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,SelfDestructingSolverStorable44 [2022-01-18 05:45:32,839 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:45:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:45:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1944549193, now seen corresponding path program 43 times [2022-01-18 05:45:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:45:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759845346] [2022-01-18 05:45:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:45:32,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:45:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:33,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:45:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759845346] [2022-01-18 05:45:33,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759845346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:45:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147339410] [2022-01-18 05:45:33,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:45:33,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:45:33,091 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:45:33,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 05:45:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-18 05:45:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:45:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:33,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:45:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:33,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147339410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:45:33,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:45:33,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-01-18 05:45:33,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58872369] [2022-01-18 05:45:33,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:45:33,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:45:33,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:45:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:45:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:45:33,594 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:45:34,127 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2022-01-18 05:45:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:45:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-18 05:45:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:45:34,128 INFO L225 Difference]: With dead ends: 930 [2022-01-18 05:45:34,128 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 05:45:34,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:45:34,129 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 137 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:45:34,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1849 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:45:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 05:45:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2022-01-18 05:45:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2022-01-18 05:45:34,138 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2022-01-18 05:45:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:45:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2022-01-18 05:45:34,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2022-01-18 05:45:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-18 05:45:34,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:45:34,140 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:45:34,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 05:45:34,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 05:45:34,346 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:45:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:45:34,347 INFO L85 PathProgramCache]: Analyzing trace with hash 940325067, now seen corresponding path program 44 times [2022-01-18 05:45:34,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:45:34,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406985053] [2022-01-18 05:45:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:45:34,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:45:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:34,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:45:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406985053] [2022-01-18 05:45:34,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406985053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:45:34,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590355667] [2022-01-18 05:45:34,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:45:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:45:34,869 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:45:34,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 05:45:34,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:45:34,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:45:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:45:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:45:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:35,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:45:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590355667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:45:36,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:45:36,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2022-01-18 05:45:36,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563956972] [2022-01-18 05:45:36,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:45:36,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-18 05:45:36,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:45:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-18 05:45:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=6003, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 05:45:36,476 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:45:56,888 INFO L93 Difference]: Finished difference Result 6566 states and 12573 transitions. [2022-01-18 05:45:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-01-18 05:45:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-18 05:45:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:45:56,893 INFO L225 Difference]: With dead ends: 6566 [2022-01-18 05:45:56,893 INFO L226 Difference]: Without dead ends: 4817 [2022-01-18 05:45:56,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131066 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=71840, Invalid=223552, Unknown=0, NotChecked=0, Total=295392 [2022-01-18 05:45:56,904 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1488 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 4264 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 4586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 4264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:45:56,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 639 Invalid, 4586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 4264 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:45:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4817 states. [2022-01-18 05:45:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4817 to 379. [2022-01-18 05:45:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2022-01-18 05:45:56,926 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2022-01-18 05:45:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:45:56,926 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2022-01-18 05:45:56,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:45:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2022-01-18 05:45:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-18 05:45:56,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:45:56,927 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:45:56,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 05:45:57,149 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,SelfDestructingSolverStorable46 [2022-01-18 05:45:57,149 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:45:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:45:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash -306106963, now seen corresponding path program 45 times [2022-01-18 05:45:57,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:45:57,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035835429] [2022-01-18 05:45:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:45:57,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:45:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:45:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:57,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:45:57,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035835429] [2022-01-18 05:45:57,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035835429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:45:57,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222746937] [2022-01-18 05:45:57,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:45:57,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:45:57,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:45:57,430 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:45:57,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 05:45:57,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-01-18 05:45:57,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:45:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:45:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:45:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:45:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:45:59,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222746937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:45:59,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:45:59,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 84 [2022-01-18 05:45:59,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252818156] [2022-01-18 05:45:59,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:45:59,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-18 05:45:59,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:45:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-18 05:45:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5431, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 05:45:59,337 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 85 states, 85 states have (on average 2.458823529411765) internal successors, (209), 84 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:46:10,584 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2022-01-18 05:46:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-01-18 05:46:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.458823529411765) internal successors, (209), 84 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-18 05:46:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:46:10,588 INFO L225 Difference]: With dead ends: 3412 [2022-01-18 05:46:10,588 INFO L226 Difference]: Without dead ends: 3408 [2022-01-18 05:46:10,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69511 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=42763, Invalid=122479, Unknown=0, NotChecked=0, Total=165242 [2022-01-18 05:46:10,597 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1199 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:46:10,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 237 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:46:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-01-18 05:46:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2022-01-18 05:46:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2022-01-18 05:46:10,611 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2022-01-18 05:46:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:46:10,611 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2022-01-18 05:46:10,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.458823529411765) internal successors, (209), 84 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2022-01-18 05:46:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-18 05:46:10,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:46:10,613 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:46:10,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 05:46:10,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:10,819 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:46:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:46:10,819 INFO L85 PathProgramCache]: Analyzing trace with hash 786351625, now seen corresponding path program 46 times [2022-01-18 05:46:10,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:46:10,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859282396] [2022-01-18 05:46:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:46:10,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:46:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:46:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:11,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:46:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859282396] [2022-01-18 05:46:11,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859282396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:46:11,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789869908] [2022-01-18 05:46:11,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:46:11,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:11,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:46:11,073 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:46:11,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 05:46:11,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:46:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:46:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-18 05:46:11,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:46:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:11,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:46:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:11,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789869908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:46:11,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:46:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-01-18 05:46:11,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864062051] [2022-01-18 05:46:11,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:46:11,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:46:11,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:46:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:46:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:46:11,601 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:46:12,174 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2022-01-18 05:46:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:46:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-18 05:46:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:46:12,175 INFO L225 Difference]: With dead ends: 989 [2022-01-18 05:46:12,175 INFO L226 Difference]: Without dead ends: 878 [2022-01-18 05:46:12,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:46:12,176 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 146 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:46:12,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2083 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:46:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-01-18 05:46:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2022-01-18 05:46:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2022-01-18 05:46:12,185 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2022-01-18 05:46:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:46:12,185 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2022-01-18 05:46:12,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2022-01-18 05:46:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-18 05:46:12,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:46:12,186 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:46:12,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 05:46:12,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 05:46:12,399 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:46:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:46:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -404556149, now seen corresponding path program 47 times [2022-01-18 05:46:12,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:46:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499181203] [2022-01-18 05:46:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:46:12,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:46:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:46:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:12,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:46:12,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499181203] [2022-01-18 05:46:12,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499181203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:46:12,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636402261] [2022-01-18 05:46:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:46:12,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:12,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:46:12,997 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:46:12,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 05:46:13,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-01-18 05:46:13,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:46:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 05:46:13,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:46:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:14,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:46:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:14,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636402261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:46:14,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:46:14,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 90 [2022-01-18 05:46:14,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794054047] [2022-01-18 05:46:14,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:46:14,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-18 05:46:14,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:46:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-18 05:46:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=6734, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 05:46:14,766 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:46:39,155 INFO L93 Difference]: Finished difference Result 7322 states and 14017 transitions. [2022-01-18 05:46:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2022-01-18 05:46:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-18 05:46:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:46:39,161 INFO L225 Difference]: With dead ends: 7322 [2022-01-18 05:46:39,161 INFO L226 Difference]: Without dead ends: 5357 [2022-01-18 05:46:39,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164252 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=88390, Invalid=274616, Unknown=0, NotChecked=0, Total=363006 [2022-01-18 05:46:39,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1375 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 4259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:46:39,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 666 Invalid, 4259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:46:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2022-01-18 05:46:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 401. [2022-01-18 05:46:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2022-01-18 05:46:39,199 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2022-01-18 05:46:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:46:39,199 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2022-01-18 05:46:39,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2022-01-18 05:46:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-18 05:46:39,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:46:39,200 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:46:39,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 05:46:39,421 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,SelfDestructingSolverStorable49 [2022-01-18 05:46:39,421 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:46:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:46:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1154828209, now seen corresponding path program 48 times [2022-01-18 05:46:39,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:46:39,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630925213] [2022-01-18 05:46:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:46:39,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:46:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:46:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:39,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:46:39,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630925213] [2022-01-18 05:46:39,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630925213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:46:39,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926905110] [2022-01-18 05:46:39,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:46:39,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:39,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:46:39,741 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:46:39,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 05:46:39,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-01-18 05:46:39,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:46:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 05:46:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:46:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:40,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:46:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:41,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926905110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:46:41,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:46:41,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37, 37] total 89 [2022-01-18 05:46:41,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400756207] [2022-01-18 05:46:41,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:46:41,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-18 05:46:41,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:46:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-18 05:46:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1909, Invalid=6101, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 05:46:41,813 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 90 states, 90 states have (on average 2.4555555555555557) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:46:54,871 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2022-01-18 05:46:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-01-18 05:46:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.4555555555555557) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-18 05:46:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:46:54,875 INFO L225 Difference]: With dead ends: 3810 [2022-01-18 05:46:54,875 INFO L226 Difference]: Without dead ends: 3806 [2022-01-18 05:46:54,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86264 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=51954, Invalid=149198, Unknown=0, NotChecked=0, Total=201152 [2022-01-18 05:46:54,888 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1123 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:46:54,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 256 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:46:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2022-01-18 05:46:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2022-01-18 05:46:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2022-01-18 05:46:54,902 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2022-01-18 05:46:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:46:54,902 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2022-01-18 05:46:54,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.4555555555555557) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2022-01-18 05:46:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-18 05:46:54,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:46:54,903 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:46:54,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 05:46:55,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:55,119 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:46:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:46:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1140659145, now seen corresponding path program 49 times [2022-01-18 05:46:55,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:46:55,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524850145] [2022-01-18 05:46:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:46:55,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:46:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:46:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:55,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:46:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524850145] [2022-01-18 05:46:55,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524850145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:46:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881095027] [2022-01-18 05:46:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:46:55,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:46:55,429 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:46:55,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 05:46:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:46:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-18 05:46:55,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:46:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:55,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:46:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:55,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881095027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:46:55,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:46:55,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-01-18 05:46:55,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152695991] [2022-01-18 05:46:55,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:46:55,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:46:55,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:46:55,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:46:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:46:55,979 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:46:56,617 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2022-01-18 05:46:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:46:56,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-18 05:46:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:46:56,618 INFO L225 Difference]: With dead ends: 1048 [2022-01-18 05:46:56,618 INFO L226 Difference]: Without dead ends: 931 [2022-01-18 05:46:56,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:46:56,619 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 155 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:46:56,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2331 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:46:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-18 05:46:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2022-01-18 05:46:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2022-01-18 05:46:56,628 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2022-01-18 05:46:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:46:56,628 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2022-01-18 05:46:56,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:46:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2022-01-18 05:46:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-18 05:46:56,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:46:56,629 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:46:56,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 05:46:56,847 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,SelfDestructingSolverStorable51 [2022-01-18 05:46:56,847 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:46:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:46:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2037304501, now seen corresponding path program 50 times [2022-01-18 05:46:56,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:46:56,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026502633] [2022-01-18 05:46:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:46:56,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:46:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:46:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:57,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:46:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026502633] [2022-01-18 05:46:57,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026502633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:46:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320150156] [2022-01-18 05:46:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:46:57,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:46:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:46:57,514 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:46:57,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 05:46:57,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:46:57,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:46:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 05:46:57,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:46:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:58,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:46:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:46:59,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320150156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:46:59,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:46:59,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 95 [2022-01-18 05:46:59,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609502628] [2022-01-18 05:46:59,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:46:59,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-18 05:46:59,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:46:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-18 05:46:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=7507, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 05:46:59,448 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:47:28,480 INFO L93 Difference]: Finished difference Result 8118 states and 15537 transitions. [2022-01-18 05:47:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 573 states. [2022-01-18 05:47:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-01-18 05:47:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:47:28,486 INFO L225 Difference]: With dead ends: 8118 [2022-01-18 05:47:28,486 INFO L226 Difference]: Without dead ends: 5925 [2022-01-18 05:47:28,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203422 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=107652, Invalid=333908, Unknown=0, NotChecked=0, Total=441560 [2022-01-18 05:47:28,500 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1714 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 5102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:47:28,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1714 Valid, 760 Invalid, 5102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 4737 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 05:47:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2022-01-18 05:47:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 423. [2022-01-18 05:47:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2022-01-18 05:47:28,528 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2022-01-18 05:47:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:47:28,528 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2022-01-18 05:47:28,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2022-01-18 05:47:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-18 05:47:28,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:47:28,529 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:47:28,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 05:47:28,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:47:28,743 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:47:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:47:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1327833163, now seen corresponding path program 51 times [2022-01-18 05:47:28,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:47:28,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22353658] [2022-01-18 05:47:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:47:28,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:47:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:47:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:29,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:47:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22353658] [2022-01-18 05:47:29,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22353658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:47:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772263701] [2022-01-18 05:47:29,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:47:29,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:47:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:47:29,104 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:47:29,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 05:47:29,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-01-18 05:47:29,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:47:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 05:47:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:47:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:30,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:47:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772263701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:47:31,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:47:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39, 39] total 94 [2022-01-18 05:47:31,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268720888] [2022-01-18 05:47:31,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:47:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-18 05:47:31,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:47:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-18 05:47:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2120, Invalid=6810, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:47:31,315 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 95 states, 95 states have (on average 2.4526315789473685) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:47:46,715 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2022-01-18 05:47:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-01-18 05:47:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.4526315789473685) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-01-18 05:47:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:47:46,719 INFO L225 Difference]: With dead ends: 4230 [2022-01-18 05:47:46,719 INFO L226 Difference]: Without dead ends: 4226 [2022-01-18 05:47:46,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105895 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=62539, Invalid=180017, Unknown=0, NotChecked=0, Total=242556 [2022-01-18 05:47:46,732 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1625 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:47:46,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1625 Valid, 280 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 05:47:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2022-01-18 05:47:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2022-01-18 05:47:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2022-01-18 05:47:46,748 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2022-01-18 05:47:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:47:46,748 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2022-01-18 05:47:46,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.4526315789473685) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2022-01-18 05:47:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-18 05:47:46,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:47:46,749 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:47:46,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 05:47:46,955 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,SelfDestructingSolverStorable53 [2022-01-18 05:47:46,955 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:47:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:47:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash -267444087, now seen corresponding path program 52 times [2022-01-18 05:47:46,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:47:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39546299] [2022-01-18 05:47:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:47:46,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:47:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:47:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:47,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:47:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39546299] [2022-01-18 05:47:47,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39546299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:47:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250330035] [2022-01-18 05:47:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:47:47,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:47:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:47:47,304 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:47:47,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 05:47:47,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:47:47,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:47:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2022-01-18 05:47:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:47:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:47,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:47:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:47,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250330035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:47:47,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:47:47,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-01-18 05:47:47,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424834701] [2022-01-18 05:47:47,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:47:47,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:47:47,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:47:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:47:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:47:47,884 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:47:48,593 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2022-01-18 05:47:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:47:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-01-18 05:47:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:47:48,595 INFO L225 Difference]: With dead ends: 1107 [2022-01-18 05:47:48,595 INFO L226 Difference]: Without dead ends: 984 [2022-01-18 05:47:48,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:47:48,595 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 164 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:47:48,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2593 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2205 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:47:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-18 05:47:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2022-01-18 05:47:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2022-01-18 05:47:48,604 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2022-01-18 05:47:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:47:48,604 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2022-01-18 05:47:48,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:47:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2022-01-18 05:47:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-18 05:47:48,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:47:48,605 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:47:48,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 05:47:48,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 05:47:48,806 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:47:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:47:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2069647605, now seen corresponding path program 53 times [2022-01-18 05:47:48,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:47:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972985391] [2022-01-18 05:47:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:47:48,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:47:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:47:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:49,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:47:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972985391] [2022-01-18 05:47:49,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972985391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:47:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423443018] [2022-01-18 05:47:49,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:47:49,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:47:49,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:47:49,477 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:47:49,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 05:47:49,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-01-18 05:47:49,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:47:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:47:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:47:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:50,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:47:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:47:51,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423443018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:47:51,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:47:51,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2022-01-18 05:47:51,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100747142] [2022-01-18 05:47:51,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:47:51,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-18 05:47:51,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:47:51,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-18 05:47:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=8322, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 05:47:51,494 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:48:26,296 INFO L93 Difference]: Finished difference Result 8954 states and 17133 transitions. [2022-01-18 05:48:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2022-01-18 05:48:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-01-18 05:48:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:48:26,305 INFO L225 Difference]: With dead ends: 8954 [2022-01-18 05:48:26,305 INFO L226 Difference]: Without dead ends: 6521 [2022-01-18 05:48:26,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249266 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=129908, Invalid=402262, Unknown=0, NotChecked=0, Total=532170 [2022-01-18 05:48:26,327 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1519 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 5287 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 5608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 5287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:48:26,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 816 Invalid, 5608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 5287 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-18 05:48:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2022-01-18 05:48:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 445. [2022-01-18 05:48:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2022-01-18 05:48:26,355 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2022-01-18 05:48:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:48:26,355 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2022-01-18 05:48:26,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2022-01-18 05:48:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-18 05:48:26,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:48:26,356 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:48:26,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 05:48:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:48:26,579 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:48:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:48:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2082802247, now seen corresponding path program 54 times [2022-01-18 05:48:26,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:48:26,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812522374] [2022-01-18 05:48:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:48:26,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:48:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:48:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:26,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:48:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812522374] [2022-01-18 05:48:26,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812522374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:48:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141954294] [2022-01-18 05:48:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:48:26,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:48:26,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:48:26,954 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:48:26,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 05:48:26,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-01-18 05:48:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:48:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:48:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:48:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:28,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:48:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141954294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:48:29,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:48:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 41] total 99 [2022-01-18 05:48:29,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078023169] [2022-01-18 05:48:29,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:48:29,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-18 05:48:29,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:48:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-18 05:48:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2342, Invalid=7558, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 05:48:29,382 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 100 states, 100 states have (on average 2.45) internal successors, (245), 99 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:48:47,513 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2022-01-18 05:48:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2022-01-18 05:48:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.45) internal successors, (245), 99 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-01-18 05:48:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:48:47,518 INFO L225 Difference]: With dead ends: 4672 [2022-01-18 05:48:47,518 INFO L226 Difference]: Without dead ends: 4668 [2022-01-18 05:48:47,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128719 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=74651, Invalid=215331, Unknown=0, NotChecked=0, Total=289982 [2022-01-18 05:48:47,530 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1514 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:48:47,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 285 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 05:48:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-01-18 05:48:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2022-01-18 05:48:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2022-01-18 05:48:47,548 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2022-01-18 05:48:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:48:47,548 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2022-01-18 05:48:47,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.45) internal successors, (245), 99 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2022-01-18 05:48:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-18 05:48:47,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:48:47,549 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:48:47,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 05:48:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:48:47,771 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:48:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:48:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1284395959, now seen corresponding path program 55 times [2022-01-18 05:48:47,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:48:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673802285] [2022-01-18 05:48:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:48:47,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:48:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:48:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:48,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:48:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673802285] [2022-01-18 05:48:48,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673802285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:48:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501687971] [2022-01-18 05:48:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:48:48,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:48:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:48:48,104 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:48:48,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 05:48:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:48:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-18 05:48:48,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:48:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:48,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:48:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:48,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501687971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:48:48,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:48:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-01-18 05:48:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150977803] [2022-01-18 05:48:48,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:48:48,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:48:48,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:48:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:48:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:48:48,713 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:48:49,478 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2022-01-18 05:48:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:48:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-01-18 05:48:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:48:49,479 INFO L225 Difference]: With dead ends: 1166 [2022-01-18 05:48:49,479 INFO L226 Difference]: Without dead ends: 1037 [2022-01-18 05:48:49,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:48:49,480 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 173 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2869 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:48:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2869 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:48:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-18 05:48:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2022-01-18 05:48:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2022-01-18 05:48:49,487 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2022-01-18 05:48:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:48:49,487 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2022-01-18 05:48:49,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:48:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2022-01-18 05:48:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-18 05:48:49,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:48:49,488 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:48:49,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 05:48:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:48:49,689 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:48:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:48:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1237898805, now seen corresponding path program 56 times [2022-01-18 05:48:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:48:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841407802] [2022-01-18 05:48:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:48:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:48:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:48:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:50,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:48:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841407802] [2022-01-18 05:48:50,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841407802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:48:50,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354448571] [2022-01-18 05:48:50,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:48:50,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:48:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:48:50,439 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:48:50,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 05:48:50,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:48:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:48:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:48:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:48:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:51,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:48:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:48:52,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354448571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:48:52,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:48:52,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 105 [2022-01-18 05:48:52,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302705900] [2022-01-18 05:48:52,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:48:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-18 05:48:52,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:48:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-18 05:48:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=9179, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 05:48:52,659 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:49:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:49:33,649 INFO L93 Difference]: Finished difference Result 9830 states and 18805 transitions. [2022-01-18 05:49:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-01-18 05:49:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-01-18 05:49:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:49:33,657 INFO L225 Difference]: With dead ends: 9830 [2022-01-18 05:49:33,657 INFO L226 Difference]: Without dead ends: 7145 [2022-01-18 05:49:33,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302503 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=155454, Invalid=480552, Unknown=0, NotChecked=0, Total=636006 [2022-01-18 05:49:33,681 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1633 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 5654 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 6007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 5654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:49:33,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 877 Invalid, 6007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 5654 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-18 05:49:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7145 states. [2022-01-18 05:49:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7145 to 467. [2022-01-18 05:49:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:49:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2022-01-18 05:49:33,717 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2022-01-18 05:49:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:49:33,717 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2022-01-18 05:49:33,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:49:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2022-01-18 05:49:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-18 05:49:33,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:49:33,718 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:49:33,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 05:49:33,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 05:49:33,941 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:49:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:49:33,942 INFO L85 PathProgramCache]: Analyzing trace with hash 90081725, now seen corresponding path program 57 times [2022-01-18 05:49:33,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:49:33,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91312013] [2022-01-18 05:49:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:49:33,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:49:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:49:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:49:34,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:49:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91312013] [2022-01-18 05:49:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91312013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:49:34,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029252012] [2022-01-18 05:49:34,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:49:34,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:49:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:49:34,301 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:49:34,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 05:49:34,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-18 05:49:34,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:49:34,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:49:34,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:49:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:49:35,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:49:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:49:36,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029252012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:49:36,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:49:36,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43, 43] total 104 [2022-01-18 05:49:36,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506749433] [2022-01-18 05:49:36,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:49:36,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-18 05:49:36,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:49:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-18 05:49:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=8345, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 05:49:36,966 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 105 states, 105 states have (on average 2.447619047619048) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:49:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:49:58,194 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2022-01-18 05:49:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-01-18 05:49:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.447619047619048) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-01-18 05:49:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:49:58,199 INFO L225 Difference]: With dead ends: 5136 [2022-01-18 05:49:58,199 INFO L226 Difference]: Without dead ends: 5132 [2022-01-18 05:49:58,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155067 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=88429, Invalid=255553, Unknown=0, NotChecked=0, Total=343982 [2022-01-18 05:49:58,215 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1665 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:49:58,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1665 Valid, 326 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:49:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2022-01-18 05:49:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2022-01-18 05:49:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:49:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2022-01-18 05:49:58,233 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2022-01-18 05:49:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:49:58,233 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2022-01-18 05:49:58,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.447619047619048) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:49:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2022-01-18 05:49:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-18 05:49:58,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:49:58,234 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:49:58,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 05:49:58,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 05:49:58,434 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:49:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:49:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash -837716215, now seen corresponding path program 58 times [2022-01-18 05:49:58,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:49:58,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358769470] [2022-01-18 05:49:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:49:58,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:49:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:49:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:49:58,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:49:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358769470] [2022-01-18 05:49:58,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358769470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:49:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202455804] [2022-01-18 05:49:58,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:49:58,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:49:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:49:58,794 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:49:58,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 05:49:58,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:49:58,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:49:58,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-18 05:49:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:49:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:49:59,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:49:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:49:59,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202455804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:49:59,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:49:59,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-01-18 05:49:59,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308581603] [2022-01-18 05:49:59,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:49:59,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:49:59,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:49:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:49:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:49:59,427 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:50:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:50:00,329 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2022-01-18 05:50:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:50:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-01-18 05:50:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:50:00,330 INFO L225 Difference]: With dead ends: 1225 [2022-01-18 05:50:00,330 INFO L226 Difference]: Without dead ends: 1090 [2022-01-18 05:50:00,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:50:00,331 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 182 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:50:00,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3159 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:50:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-01-18 05:50:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2022-01-18 05:50:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:50:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2022-01-18 05:50:00,341 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2022-01-18 05:50:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:50:00,341 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2022-01-18 05:50:00,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:50:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2022-01-18 05:50:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-18 05:50:00,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:50:00,342 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:50:00,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 05:50:00,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:50:00,542 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:50:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:50:00,542 INFO L85 PathProgramCache]: Analyzing trace with hash -822582389, now seen corresponding path program 59 times [2022-01-18 05:50:00,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:50:00,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722050910] [2022-01-18 05:50:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:50:00,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:50:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:50:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:50:01,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:50:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722050910] [2022-01-18 05:50:01,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722050910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:50:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119968208] [2022-01-18 05:50:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:50:01,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:50:01,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:50:01,241 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:50:01,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 05:50:01,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-01-18 05:50:01,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:50:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 05:50:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:50:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:50:02,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:50:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:50:03,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119968208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:50:03,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:50:03,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 110 [2022-01-18 05:50:03,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005506947] [2022-01-18 05:50:03,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:50:03,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-18 05:50:03,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:50:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-18 05:50:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2132, Invalid=10078, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 05:50:03,742 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:50:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:50:52,376 INFO L93 Difference]: Finished difference Result 10746 states and 20553 transitions. [2022-01-18 05:50:52,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 762 states. [2022-01-18 05:50:52,378 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-01-18 05:50:52,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:50:52,388 INFO L225 Difference]: With dead ends: 10746 [2022-01-18 05:50:52,388 INFO L226 Difference]: Without dead ends: 7797 [2022-01-18 05:50:52,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363898 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=184600, Invalid=569692, Unknown=0, NotChecked=0, Total=754292 [2022-01-18 05:50:52,496 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1970 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 6493 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 6923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 6493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:50:52,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 972 Invalid, 6923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 6493 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-18 05:50:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2022-01-18 05:50:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 489. [2022-01-18 05:50:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:50:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2022-01-18 05:50:52,536 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2022-01-18 05:50:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:50:52,536 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2022-01-18 05:50:52,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:50:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2022-01-18 05:50:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-18 05:50:52,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:50:52,537 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:50:52,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 05:50:52,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:50:52,756 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:50:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:50:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash 846109633, now seen corresponding path program 60 times [2022-01-18 05:50:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:50:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327968094] [2022-01-18 05:50:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:50:52,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:50:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:50:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:50:53,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:50:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327968094] [2022-01-18 05:50:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327968094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:50:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030401152] [2022-01-18 05:50:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:50:53,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:50:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:50:53,206 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:50:53,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 05:50:53,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-01-18 05:50:53,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:50:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 05:50:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:50:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:50:54,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:50:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:50:56,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030401152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:50:56,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:50:56,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 109 [2022-01-18 05:50:56,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747911901] [2022-01-18 05:50:56,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:50:56,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-18 05:50:56,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:50:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-18 05:50:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2819, Invalid=9171, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 05:50:56,059 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 110 states, 110 states have (on average 2.4454545454545453) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:51:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:51:20,941 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2022-01-18 05:51:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 531 states. [2022-01-18 05:51:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.4454545454545453) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-01-18 05:51:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:51:20,947 INFO L225 Difference]: With dead ends: 5622 [2022-01-18 05:51:20,947 INFO L226 Difference]: Without dead ends: 5618 [2022-01-18 05:51:20,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185287 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=104018, Invalid=301114, Unknown=0, NotChecked=0, Total=405132 [2022-01-18 05:51:20,967 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1712 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 3422 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 3422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:51:20,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 334 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 3422 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:51:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2022-01-18 05:51:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2022-01-18 05:51:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0808823529411766) internal successors, (849), 408 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:51:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2022-01-18 05:51:20,986 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2022-01-18 05:51:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:51:20,986 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2022-01-18 05:51:20,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.4454545454545453) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:51:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2022-01-18 05:51:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-18 05:51:20,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:51:20,987 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:51:21,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 05:51:21,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:51:21,188 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:51:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:51:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1150598967, now seen corresponding path program 61 times [2022-01-18 05:51:21,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:51:21,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575335522] [2022-01-18 05:51:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:51:21,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:51:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:51:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:51:21,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:51:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575335522] [2022-01-18 05:51:21,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575335522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:51:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193899374] [2022-01-18 05:51:21,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:51:21,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:51:21,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:51:21,583 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:51:21,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 05:51:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:51:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2022-01-18 05:51:21,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:51:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:51:21,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:51:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:51:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193899374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:51:22,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:51:22,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-01-18 05:51:22,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305530493] [2022-01-18 05:51:22,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:51:22,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:51:22,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:51:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:51:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:51:22,250 INFO L87 Difference]: Start difference. First operand 409 states and 849 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:51:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:51:23,239 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2022-01-18 05:51:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:51:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-01-18 05:51:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:51:23,241 INFO L225 Difference]: With dead ends: 1284 [2022-01-18 05:51:23,241 INFO L226 Difference]: Without dead ends: 1143 [2022-01-18 05:51:23,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:51:23,242 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 191 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3463 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:51:23,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3463 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 05:51:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-01-18 05:51:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2022-01-18 05:51:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.1583815028901734) internal successors, (1867), 865 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:51:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2022-01-18 05:51:23,251 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2022-01-18 05:51:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:51:23,252 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2022-01-18 05:51:23,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:51:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2022-01-18 05:51:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-18 05:51:23,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:51:23,253 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:51:23,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 05:51:23,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:51:23,453 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:51:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:51:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -568058805, now seen corresponding path program 62 times [2022-01-18 05:51:23,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:51:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265677110] [2022-01-18 05:51:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:51:23,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:51:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:51:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:51:24,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:51:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265677110] [2022-01-18 05:51:24,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265677110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:51:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052168763] [2022-01-18 05:51:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:51:24,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:51:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:51:24,229 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:51:24,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 05:51:24,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:51:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:51:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:51:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:51:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:51:25,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:51:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:51:26,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052168763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:51:26,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:51:26,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2022-01-18 05:51:26,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792343684] [2022-01-18 05:51:26,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:51:26,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-18 05:51:26,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:51:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-18 05:51:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=11019, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 05:51:26,827 INFO L87 Difference]: Start difference. First operand 866 states and 1867 transitions. Second operand has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:52:24,068 INFO L93 Difference]: Finished difference Result 11702 states and 22377 transitions. [2022-01-18 05:52:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 831 states. [2022-01-18 05:52:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-01-18 05:52:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:52:24,078 INFO L225 Difference]: With dead ends: 11702 [2022-01-18 05:52:24,078 INFO L226 Difference]: Without dead ends: 8477 [2022-01-18 05:52:24,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434245 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=217670, Invalid=670636, Unknown=0, NotChecked=0, Total=888306 [2022-01-18 05:52:24,108 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1848 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 6491 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1848 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 6850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 6491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:52:24,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1848 Valid, 991 Invalid, 6850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 6491 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-18 05:52:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-01-18 05:52:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 511. [2022-01-18 05:52:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.066666666666667) internal successors, (1054), 510 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2022-01-18 05:52:24,141 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2022-01-18 05:52:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:52:24,142 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2022-01-18 05:52:24,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2022-01-18 05:52:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-18 05:52:24,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:52:24,143 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:52:24,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 05:52:24,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 05:52:24,343 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:52:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:52:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2106862533, now seen corresponding path program 63 times [2022-01-18 05:52:24,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:52:24,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435421808] [2022-01-18 05:52:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:52:24,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:52:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:52:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:24,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:52:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435421808] [2022-01-18 05:52:24,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435421808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:52:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513512702] [2022-01-18 05:52:24,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:52:24,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:52:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:52:24,758 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:52:24,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 05:52:24,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-01-18 05:52:24,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:52:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:52:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:52:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:26,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:52:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513512702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:52:27,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:52:27,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47, 47] total 114 [2022-01-18 05:52:27,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314075919] [2022-01-18 05:52:27,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:52:27,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-18 05:52:27,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:52:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-18 05:52:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10036, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 05:52:27,803 INFO L87 Difference]: Start difference. First operand 511 states and 1054 transitions. Second operand has 115 states, 115 states have (on average 2.4434782608695653) internal successors, (281), 114 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:52:56,547 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2022-01-18 05:52:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 578 states. [2022-01-18 05:52:56,548 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.4434782608695653) internal successors, (281), 114 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-01-18 05:52:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:52:56,553 INFO L225 Difference]: With dead ends: 6130 [2022-01-18 05:52:56,553 INFO L226 Difference]: Without dead ends: 6126 [2022-01-18 05:52:56,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219743 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=121569, Invalid=352463, Unknown=0, NotChecked=0, Total=474032 [2022-01-18 05:52:56,571 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2114 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 4327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:52:56,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2114 Valid, 344 Invalid, 4327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:52:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-01-18 05:52:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2022-01-18 05:52:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.0821596244131455) internal successors, (887), 426 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2022-01-18 05:52:56,593 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2022-01-18 05:52:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:52:56,593 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2022-01-18 05:52:56,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.4434782608695653) internal successors, (281), 114 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2022-01-18 05:52:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-18 05:52:56,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:52:56,594 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:52:56,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 05:52:56,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:52:56,795 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:52:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:52:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1366570615, now seen corresponding path program 64 times [2022-01-18 05:52:56,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:52:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152176873] [2022-01-18 05:52:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:52:56,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:52:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:52:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:57,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:52:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152176873] [2022-01-18 05:52:57,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152176873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:52:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447740783] [2022-01-18 05:52:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:52:57,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:52:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:52:57,196 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:52:57,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 05:52:57,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:52:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:52:57,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2022-01-18 05:52:57,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:52:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:52:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:57,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447740783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:52:57,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:52:57,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-01-18 05:52:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201386436] [2022-01-18 05:52:57,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:52:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:52:57,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:52:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:52:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:52:57,872 INFO L87 Difference]: Start difference. First operand 427 states and 887 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:52:58,896 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2022-01-18 05:52:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:52:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-01-18 05:52:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:52:58,898 INFO L225 Difference]: With dead ends: 1343 [2022-01-18 05:52:58,898 INFO L226 Difference]: Without dead ends: 1196 [2022-01-18 05:52:58,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:52:58,898 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 200 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 3222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:52:58,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3781 Invalid, 3222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 05:52:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-18 05:52:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2022-01-18 05:52:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2022-01-18 05:52:58,907 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2022-01-18 05:52:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:52:58,907 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2022-01-18 05:52:58,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:52:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2022-01-18 05:52:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-18 05:52:58,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:52:58,908 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:52:58,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 05:52:59,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 05:52:59,109 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:52:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:52:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -897117173, now seen corresponding path program 65 times [2022-01-18 05:52:59,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:52:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681737803] [2022-01-18 05:52:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:52:59,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:52:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:52:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:52:59,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:52:59,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681737803] [2022-01-18 05:52:59,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681737803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:52:59,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76841550] [2022-01-18 05:52:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:52:59,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:52:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:52:59,912 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:52:59,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 05:52:59,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-18 05:52:59,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:52:59,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:52:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:53:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:53:01,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:53:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:53:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76841550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:53:02,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:53:02,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 120 [2022-01-18 05:53:02,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231093531] [2022-01-18 05:53:02,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:53:02,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-18 05:53:02,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:53:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-18 05:53:02,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=12002, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 05:53:02,673 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:10,011 INFO L93 Difference]: Finished difference Result 12698 states and 24277 transitions. [2022-01-18 05:54:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 903 states. [2022-01-18 05:54:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-01-18 05:54:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:10,023 INFO L225 Difference]: With dead ends: 12698 [2022-01-18 05:54:10,023 INFO L226 Difference]: Without dead ends: 9185 [2022-01-18 05:54:10,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 1018 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514384 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=255002, Invalid=784378, Unknown=0, NotChecked=0, Total=1039380 [2022-01-18 05:54:10,057 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2287 mSDsluCounter, 2471 mSDsCounter, 0 mSdLazyCounter, 6983 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 7417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 6983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:10,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 1045 Invalid, 7417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 6983 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-18 05:54:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9185 states. [2022-01-18 05:54:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9185 to 533. [2022-01-18 05:54:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.0676691729323307) internal successors, (1100), 532 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2022-01-18 05:54:10,091 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2022-01-18 05:54:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2022-01-18 05:54:10,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2022-01-18 05:54:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-18 05:54:10,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:10,092 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:10,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 05:54:10,292 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:54:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1898432055, now seen corresponding path program 66 times [2022-01-18 05:54:10,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:10,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125605056] [2022-01-18 05:54:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:10,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:10,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125605056] [2022-01-18 05:54:10,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125605056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823544877] [2022-01-18 05:54:10,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:54:10,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:10,723 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:54:10,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 05:54:10,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-01-18 05:54:10,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:54:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:13,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823544877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:13,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:13,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49, 49] total 119 [2022-01-18 05:54:13,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078333294] [2022-01-18 05:54:13,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:13,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-18 05:54:13,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:13,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-18 05:54:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3340, Invalid=10940, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 05:54:13,995 INFO L87 Difference]: Start difference. First operand 533 states and 1100 transitions. Second operand has 120 states, 120 states have (on average 2.441666666666667) internal successors, (293), 119 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 05:54:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 573 states. [2022-01-18 05:54:42,947 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:54:42,948 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:54:42,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223860 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=126781, Invalid=347251, Unknown=0, NotChecked=0, Total=474032 [2022-01-18 05:54:42,958 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1992 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 4010 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 4573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:42,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 364 Invalid, 4573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 4010 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 05:54:42,959 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 05:54:42,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 05:54:43,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 05:54:43,160 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (533states) and FLOYD_HOARE automaton (currently 573 states, 120 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 689 known predicates. [2022-01-18 05:54:43,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 05:54:43,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 05:54:43,163 INFO L732 BasicCegarLoop]: Path program histogram: [66, 2, 1] [2022-01-18 05:54:43,165 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:54:43,165 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:54:43,167 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:54:43 BasicIcfg [2022-01-18 05:54:43,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:54:43,167 INFO L158 Benchmark]: Toolchain (without parser) took 728213.46ms. Allocated memory was 377.5MB in the beginning and 2.8GB in the end (delta: 2.5GB). Free memory was 335.7MB in the beginning and 1.5GB in the end (delta: -1.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2022-01-18 05:54:43,167 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 377.5MB. Free memory is still 336.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:54:43,168 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.82ms. Allocated memory is still 377.5MB. Free memory was 335.6MB in the beginning and 334.2MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 05:54:43,168 INFO L158 Benchmark]: Boogie Preprocessor took 16.52ms. Allocated memory is still 377.5MB. Free memory was 334.2MB in the beginning and 333.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:54:43,168 INFO L158 Benchmark]: RCFGBuilder took 230.56ms. Allocated memory is still 377.5MB. Free memory was 333.1MB in the beginning and 324.2MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 05:54:43,168 INFO L158 Benchmark]: TraceAbstraction took 727932.77ms. Allocated memory was 377.5MB in the beginning and 2.8GB in the end (delta: 2.5GB). Free memory was 323.8MB in the beginning and 1.5GB in the end (delta: -1.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2022-01-18 05:54:43,168 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 0.12ms. Allocated memory is still 377.5MB. Free memory is still 336.8MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.82ms. Allocated memory is still 377.5MB. Free memory was 335.6MB in the beginning and 334.2MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.52ms. Allocated memory is still 377.5MB. Free memory was 334.2MB in the beginning and 333.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 230.56ms. Allocated memory is still 377.5MB. Free memory was 333.1MB in the beginning and 324.2MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 727932.77ms. Allocated memory was 377.5MB in the beginning and 2.8GB in the end (delta: 2.5GB). Free memory was 323.8MB in the beginning and 1.5GB in the end (delta: -1.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (533states) and FLOYD_HOARE automaton (currently 573 states, 120 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 689 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (533states) and FLOYD_HOARE automaton (currently 573 states, 120 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 689 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (533states) and FLOYD_HOARE automaton (currently 573 states, 120 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 689 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 727.8s, OverallIterations: 69, TraceHistogramMax: 23, PathProgramHistogramMax: 66, EmptinessCheckTime: 0.1s, AutomataDifference: 621.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47427 SdHoareTripleChecker+Valid, 66.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47427 mSDsluCounter, 46380 SdHoareTripleChecker+Invalid, 55.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 75361 mSDsCounter, 10972 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 132898 IncrementalHoareTripleChecker+Invalid, 143870 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10972 mSolverCounterUnsat, 2551 mSDtfsCounter, 132898 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23157 GetRequests, 6664 SyntacticMatches, 111 SemanticMatches, 16381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4147486 ImplicationChecksByTransitivity, 472.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=67, InterpolantAutomatonStates: 13119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 68 MinimizatonAttempts, 124434 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 87.2s InterpolantComputationTime, 8294 NumberOfCodeBlocks, 8294 NumberOfCodeBlocksAsserted, 608 NumberOfCheckSat, 12222 ConstructedInterpolants, 0 QuantifiedInterpolants, 107894 SizeOfPredicates, 337 NumberOfNonLiveVariables, 10517 ConjunctsInSsa, 2315 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 24378/71482 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown