/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-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:55:16,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:55:16,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:55:16,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 04:55:16,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 04:55:16,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:55:16,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:55:16,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:55:16,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:55:16,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:55:16,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:55:16,831 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:55:16,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:55:16,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:55:16,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:55:16,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:55:16,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:55:16,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:55:16,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:55:16,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:55:16,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:55:17,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:55:17,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:55:17,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:55:17,102 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:55:17,103 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:55:17,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-04-15 04:55:17,104 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-04-15 04:55:17,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:55:17,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:55:17,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:55:17,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:55:17,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:55:17,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:55:17,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:55:17,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:55:17,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:55:17,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... [2021-04-15 04:55:17,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:55:17,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:55:17,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:55:17,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:55:17,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:55:17,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:55:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:55:17,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:55:17,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:55:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:55:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:55:17,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:55:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:55:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:55:17,236 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:55:17,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:55:17,397 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:55:17,398 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:55:17 BoogieIcfgContainer [2021-04-15 04:55:17,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:55:17,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:55:17,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:55:17,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:55:17,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:55:17" (1/2) ... [2021-04-15 04:55:17,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d22a56a and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:55:17, skipping insertion in model container [2021-04-15 04:55:17,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:55:17" (2/2) ... [2021-04-15 04:55:17,403 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-04-15 04:55:17,406 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:55:17,406 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:55:17,408 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:55:17,417 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:55:17,444 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 04:55:17,455 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 04:55:17,466 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:55:17,466 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:55:17,466 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:55:17,466 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:55:17,466 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:55:17,467 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:55:17,467 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:55:17,467 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:55:17,472 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-04-15 04:55:17,482 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 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) [2021-04-15 04:55:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 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) [2021-04-15 04:55:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 04:55:17,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:17,488 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:17,488 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-04-15 04:55:17,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:17,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506209083] [2021-04-15 04:55:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506209083] [2021-04-15 04:55:17,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:55:17,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:55:17,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97510651] [2021-04-15 04:55:17,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:55:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:17,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:55:17,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:55:17,594 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:17,611 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-04-15 04:55:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:55:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 04:55:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:17,618 INFO L225 Difference]: With dead ends: 104 [2021-04-15 04:55:17,619 INFO L226 Difference]: Without dead ends: 87 [2021-04-15 04:55:17,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:55:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-04-15 04:55:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-04-15 04:55:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-04-15 04:55:17,652 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-04-15 04:55:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:17,652 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-04-15 04:55:17,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-04-15 04:55:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 04:55:17,654 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:17,654 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:17,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:55:17,654 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-04-15 04:55:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:17,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667441046] [2021-04-15 04:55:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:17,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667441046] [2021-04-15 04:55:17,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:55:17,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:55:17,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074124162] [2021-04-15 04:55:17,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:55:17,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:17,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:55:17,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:55:17,724 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:17,753 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-04-15 04:55:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:55:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 04:55:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:17,756 INFO L225 Difference]: With dead ends: 91 [2021-04-15 04:55:17,756 INFO L226 Difference]: Without dead ends: 83 [2021-04-15 04:55:17,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:55:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-04-15 04:55:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-04-15 04:55:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 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) [2021-04-15 04:55:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-04-15 04:55:17,762 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-04-15 04:55:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:17,763 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-04-15 04:55:17,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-04-15 04:55:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:55:17,763 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:17,764 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:17,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 04:55:17,764 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:17,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-04-15 04:55:17,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:17,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757033430] [2021-04-15 04:55:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:17,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757033430] [2021-04-15 04:55:17,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260346747] [2021-04-15 04:55:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 04:55:17,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:18,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-04-15 04:55:18,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:18,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:18,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:18,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-04-15 04:55:18,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:55:18,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:18,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:18,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:18,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-04-15 04:55:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:18,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:18,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 04:55:18,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86086883] [2021-04-15 04:55:18,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:55:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:18,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:55:18,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:55:18,173 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:18,290 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-04-15 04:55:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:55:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 04:55:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:18,297 INFO L225 Difference]: With dead ends: 154 [2021-04-15 04:55:18,297 INFO L226 Difference]: Without dead ends: 137 [2021-04-15 04:55:18,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:55:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-04-15 04:55:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-04-15 04:55:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 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) [2021-04-15 04:55:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-04-15 04:55:18,312 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-04-15 04:55:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:18,312 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-04-15 04:55:18,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-04-15 04:55:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 04:55:18,318 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:18,318 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:18,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 04:55:18,533 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-04-15 04:55:18,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:18,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457039038] [2021-04-15 04:55:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:18,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457039038] [2021-04-15 04:55:18,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591147654] [2021-04-15 04:55:18,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:18,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:55:18,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:55:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:18,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:18,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-04-15 04:55:18,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151713667] [2021-04-15 04:55:18,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:55:18,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:55:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:55:18,710 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:18,781 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-04-15 04:55:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:55:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 27 [2021-04-15 04:55:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:18,783 INFO L225 Difference]: With dead ends: 284 [2021-04-15 04:55:18,783 INFO L226 Difference]: Without dead ends: 264 [2021-04-15 04:55:18,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:55:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-04-15 04:55:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-04-15 04:55:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-04-15 04:55:18,791 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-04-15 04:55:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:18,791 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-04-15 04:55:18,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-04-15 04:55:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:55:18,792 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:18,792 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:19,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:19,007 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-04-15 04:55:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025070738] [2021-04-15 04:55:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:19,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025070738] [2021-04-15 04:55:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265868976] [2021-04-15 04:55:19,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:19,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:55:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:55:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:19,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:19,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-04-15 04:55:19,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:19,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:19,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:19,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-04-15 04:55:19,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:19,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-04-15 04:55:19,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:55:19,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:19,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:19,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-04-15 04:55:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:19,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:19,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-04-15 04:55:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560201223] [2021-04-15 04:55:19,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:55:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:55:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:55:19,733 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:21,497 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-04-15 04:55:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:55:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 32 [2021-04-15 04:55:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:21,503 INFO L225 Difference]: With dead ends: 650 [2021-04-15 04:55:21,503 INFO L226 Difference]: Without dead ends: 573 [2021-04-15 04:55:21,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1378.1ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:55:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-04-15 04:55:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-04-15 04:55:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-04-15 04:55:21,514 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-04-15 04:55:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:21,514 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-04-15 04:55:21,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-04-15 04:55:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:55:21,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:21,516 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:21,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:21,720 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-04-15 04:55:21,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:21,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320010647] [2021-04-15 04:55:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:55:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320010647] [2021-04-15 04:55:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632058444] [2021-04-15 04:55:21,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:22,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:55:22,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:55:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:22,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:22,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-04-15 04:55:22,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:22,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:22,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:22,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-04-15 04:55:22,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:22,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:22,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-04-15 04:55:22,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:22,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:22,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:22,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-04-15 04:55:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:22,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:22,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-04-15 04:55:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846700723] [2021-04-15 04:55:22,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 04:55:22,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 04:55:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:55:22,375 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:23,014 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-04-15 04:55:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:55:23,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 32 [2021-04-15 04:55:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:23,019 INFO L225 Difference]: With dead ends: 1023 [2021-04-15 04:55:23,019 INFO L226 Difference]: Without dead ends: 878 [2021-04-15 04:55:23,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:55:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-04-15 04:55:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-04-15 04:55:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-04-15 04:55:23,032 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-04-15 04:55:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:23,032 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-04-15 04:55:23,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-04-15 04:55:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:55:23,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:23,033 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:23,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:23,249 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-04-15 04:55:23,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:23,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704403670] [2021-04-15 04:55:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:23,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704403670] [2021-04-15 04:55:23,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576053547] [2021-04-15 04:55:23,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:23,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:55:23,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:55:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:23,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:23,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-04-15 04:55:23,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:23,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:23,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:23,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-04-15 04:55:23,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:23,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:23,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-04-15 04:55:23,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:23,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:23,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:23,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-04-15 04:55:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:23,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:23,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-04-15 04:55:23,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109736593] [2021-04-15 04:55:23,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:55:23,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:55:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:55:23,897 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:24,626 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-04-15 04:55:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:55:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 32 [2021-04-15 04:55:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:24,634 INFO L225 Difference]: With dead ends: 1081 [2021-04-15 04:55:24,634 INFO L226 Difference]: Without dead ends: 927 [2021-04-15 04:55:24,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 04:55:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-04-15 04:55:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-04-15 04:55:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-04-15 04:55:24,646 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-04-15 04:55:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:24,647 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-04-15 04:55:24,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-04-15 04:55:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:55:24,648 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:24,648 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:24,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 04:55:24,853 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-04-15 04:55:24,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:24,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077765670] [2021-04-15 04:55:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:55:25,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077765670] [2021-04-15 04:55:25,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359570091] [2021-04-15 04:55:25,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:25,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:55:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:55:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:25,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:25,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-04-15 04:55:25,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:25,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:25,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:25,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-04-15 04:55:25,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:25,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:25,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-04-15 04:55:25,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:25,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:25,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:25,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-04-15 04:55:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:25,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:25,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-04-15 04:55:25,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176399195] [2021-04-15 04:55:25,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:55:25,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:25,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:55:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:55:25,423 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:25,937 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-04-15 04:55:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:55:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 04:55:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:25,940 INFO L225 Difference]: With dead ends: 1039 [2021-04-15 04:55:25,940 INFO L226 Difference]: Without dead ends: 929 [2021-04-15 04:55:25,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:55:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-04-15 04:55:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-04-15 04:55:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-04-15 04:55:25,950 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-04-15 04:55:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:25,950 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-04-15 04:55:25,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-04-15 04:55:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:55:25,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:25,951 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:26,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:26,157 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-04-15 04:55:26,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:26,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176531983] [2021-04-15 04:55:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:26,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176531983] [2021-04-15 04:55:26,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972670827] [2021-04-15 04:55:26,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:55:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:26,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:26,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-04-15 04:55:26,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:26,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:26,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:26,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-04-15 04:55:26,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:26,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:26,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-04-15 04:55:26,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:26,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:26,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:26,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-04-15 04:55:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:26,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:26,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-04-15 04:55:26,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346457500] [2021-04-15 04:55:26,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:55:26,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:26,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:55:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:55:26,817 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:27,380 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-04-15 04:55:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 04:55:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 32 [2021-04-15 04:55:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:27,383 INFO L225 Difference]: With dead ends: 1050 [2021-04-15 04:55:27,383 INFO L226 Difference]: Without dead ends: 952 [2021-04-15 04:55:27,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:55:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-04-15 04:55:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-04-15 04:55:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-04-15 04:55:27,400 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-04-15 04:55:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:27,400 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-04-15 04:55:27,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-04-15 04:55:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:55:27,402 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:27,403 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:27,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:27,610 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-04-15 04:55:27,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:27,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188174319] [2021-04-15 04:55:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:27,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188174319] [2021-04-15 04:55:27,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645352437] [2021-04-15 04:55:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:27,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:55:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:55:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:27,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:27,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-04-15 04:55:27,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292865101] [2021-04-15 04:55:27,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:55:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:55:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:55:27,769 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:27,822 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-04-15 04:55:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:55:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:55:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:27,826 INFO L225 Difference]: With dead ends: 885 [2021-04-15 04:55:27,826 INFO L226 Difference]: Without dead ends: 847 [2021-04-15 04:55:27,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:55:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-04-15 04:55:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-04-15 04:55:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-04-15 04:55:27,837 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-04-15 04:55:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:27,838 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-04-15 04:55:27,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-04-15 04:55:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:27,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:27,839 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:28,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 04:55:28,053 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-04-15 04:55:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:28,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558797920] [2021-04-15 04:55:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:28,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558797920] [2021-04-15 04:55:28,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384079214] [2021-04-15 04:55:28,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:28,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:55:28,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:55:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:28,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:28,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-04-15 04:55:28,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:28,816 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-04-15 04:55:28,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:28,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:37 [2021-04-15 04:55:29,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:29,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 41 [2021-04-15 04:55:29,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:55:29,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:29,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:29,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:17 [2021-04-15 04:55:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:29,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:29,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-04-15 04:55:29,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189046426] [2021-04-15 04:55:29,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-04-15 04:55:29,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-04-15 04:55:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:55:29,247 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:34,562 INFO L93 Difference]: Finished difference Result 2858 states and 6129 transitions. [2021-04-15 04:55:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-04-15 04:55:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 04:55:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:34,570 INFO L225 Difference]: With dead ends: 2858 [2021-04-15 04:55:34,570 INFO L226 Difference]: Without dead ends: 2546 [2021-04-15 04:55:34,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4053 ImplicationChecksByTransitivity, 3623.4ms TimeCoverageRelationStatistics Valid=1710, Invalid=10946, Unknown=0, NotChecked=0, Total=12656 [2021-04-15 04:55:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-04-15 04:55:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 740. [2021-04-15 04:55:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.1502029769959403) internal successors, (1589), 739 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1589 transitions. [2021-04-15 04:55:34,589 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1589 transitions. Word has length 41 [2021-04-15 04:55:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:34,589 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1589 transitions. [2021-04-15 04:55:34,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1589 transitions. [2021-04-15 04:55:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:34,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:34,590 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:34,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:34,795 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-04-15 04:55:34,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:34,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776319138] [2021-04-15 04:55:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:55:35,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776319138] [2021-04-15 04:55:35,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914931247] [2021-04-15 04:55:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:35,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:55:35,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 04:55:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:35,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:35,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-04-15 04:55:35,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:35,826 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-04-15 04:55:35,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:35,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-04-15 04:55:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:36,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:36,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:36,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-04-15 04:55:36,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:36,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:36,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:36,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:36,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-04-15 04:55:36,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:36,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:36,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:36,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-04-15 04:55:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:36,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:36,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-04-15 04:55:36,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196443703] [2021-04-15 04:55:36,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:55:36,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:36,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:55:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:55:36,199 INFO L87 Difference]: Start difference. First operand 740 states and 1589 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:38,293 INFO L93 Difference]: Finished difference Result 2305 states and 4887 transitions. [2021-04-15 04:55:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:55:38,294 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 04:55:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:38,299 INFO L225 Difference]: With dead ends: 2305 [2021-04-15 04:55:38,299 INFO L226 Difference]: Without dead ends: 2148 [2021-04-15 04:55:38,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1806.8ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:55:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-04-15 04:55:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 857. [2021-04-15 04:55:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.1401869158878504) internal successors, (1832), 856 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1832 transitions. [2021-04-15 04:55:38,318 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1832 transitions. Word has length 41 [2021-04-15 04:55:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:38,318 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 1832 transitions. [2021-04-15 04:55:38,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1832 transitions. [2021-04-15 04:55:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:38,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:38,319 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:38,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:38,533 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-04-15 04:55:38,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:38,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130568830] [2021-04-15 04:55:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:38,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130568830] [2021-04-15 04:55:38,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920774657] [2021-04-15 04:55:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:38,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:55:38,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 04:55:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:39,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:39,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-04-15 04:55:39,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:39,526 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.9 percent of original size [2021-04-15 04:55:39,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:39,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:35 [2021-04-15 04:55:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:39,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:39,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 04:55:39,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:39,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:39,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:39,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-04-15 04:55:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:39,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:39,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-04-15 04:55:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131949383] [2021-04-15 04:55:39,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:55:39,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:55:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:55:39,661 INFO L87 Difference]: Start difference. First operand 857 states and 1832 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:42,493 INFO L93 Difference]: Finished difference Result 2589 states and 5456 transitions. [2021-04-15 04:55:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:55:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 04:55:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:42,499 INFO L225 Difference]: With dead ends: 2589 [2021-04-15 04:55:42,499 INFO L226 Difference]: Without dead ends: 2298 [2021-04-15 04:55:42,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 1925.8ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-04-15 04:55:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-04-15 04:55:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 749. [2021-04-15 04:55:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.1550802139037435) internal successors, (1612), 748 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1612 transitions. [2021-04-15 04:55:42,516 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1612 transitions. Word has length 41 [2021-04-15 04:55:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:42,516 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1612 transitions. [2021-04-15 04:55:42,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1612 transitions. [2021-04-15 04:55:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:42,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:42,518 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:42,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-04-15 04:55:42,733 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-04-15 04:55:42,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:42,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030291301] [2021-04-15 04:55:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:55:43,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030291301] [2021-04-15 04:55:43,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164328881] [2021-04-15 04:55:43,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:43,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:55:43,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 04:55:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:43,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:43,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-04-15 04:55:43,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:43,754 INFO L628 ElimStorePlain]: treesize reduction 43, result has 55.2 percent of original size [2021-04-15 04:55:43,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:43,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:25 [2021-04-15 04:55:43,883 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-04-15 04:55:43,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 63 [2021-04-15 04:55:43,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:55:43,949 INFO L628 ElimStorePlain]: treesize reduction 43, result has 36.8 percent of original size [2021-04-15 04:55:43,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:43,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:21 [2021-04-15 04:55:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:44,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-04-15 04:55:44,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766757917] [2021-04-15 04:55:44,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-04-15 04:55:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-04-15 04:55:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:55:44,025 INFO L87 Difference]: Start difference. First operand 749 states and 1612 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:52,015 INFO L93 Difference]: Finished difference Result 3375 states and 7212 transitions. [2021-04-15 04:55:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-04-15 04:55:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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 41 [2021-04-15 04:55:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:52,026 INFO L225 Difference]: With dead ends: 3375 [2021-04-15 04:55:52,026 INFO L226 Difference]: Without dead ends: 3175 [2021-04-15 04:55:52,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6951 ImplicationChecksByTransitivity, 6123.6ms TimeCoverageRelationStatistics Valid=2545, Invalid=17195, Unknown=0, NotChecked=0, Total=19740 [2021-04-15 04:55:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-04-15 04:55:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 878. [2021-04-15 04:55:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.1584948688711516) internal successors, (1893), 877 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1893 transitions. [2021-04-15 04:55:52,052 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1893 transitions. Word has length 41 [2021-04-15 04:55:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:52,052 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 1893 transitions. [2021-04-15 04:55:52,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1893 transitions. [2021-04-15 04:55:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:52,054 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:52,054 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:52,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 04:55:52,261 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-04-15 04:55:52,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:52,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826889539] [2021-04-15 04:55:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:55:52,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826889539] [2021-04-15 04:55:52,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666005233] [2021-04-15 04:55:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 04:55:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:53,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:53,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-04-15 04:55:53,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:53,343 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-04-15 04:55:53,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:53,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-04-15 04:55:53,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-04-15 04:55:53,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:53,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:53,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:53,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-04-15 04:55:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:53,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:53,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-04-15 04:55:53,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715441844] [2021-04-15 04:55:53,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:55:53,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:55:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:55:53,458 INFO L87 Difference]: Start difference. First operand 878 states and 1893 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:55,409 INFO L93 Difference]: Finished difference Result 3209 states and 6883 transitions. [2021-04-15 04:55:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:55:55,410 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 04:55:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:55,417 INFO L225 Difference]: With dead ends: 3209 [2021-04-15 04:55:55,417 INFO L226 Difference]: Without dead ends: 3001 [2021-04-15 04:55:55,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1608.9ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 04:55:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-04-15 04:55:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1070. [2021-04-15 04:55:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.1515434985968196) internal successors, (2300), 1069 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2300 transitions. [2021-04-15 04:55:55,436 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2300 transitions. Word has length 41 [2021-04-15 04:55:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:55,436 INFO L480 AbstractCegarLoop]: Abstraction has 1070 states and 2300 transitions. [2021-04-15 04:55:55,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2300 transitions. [2021-04-15 04:55:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:55,438 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:55,438 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:55,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-04-15 04:55:55,653 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:55,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-04-15 04:55:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:55,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540316853] [2021-04-15 04:55:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:56,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540316853] [2021-04-15 04:55:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026962840] [2021-04-15 04:55:56,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:56,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:55:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 04:55:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:56,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:56,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-04-15 04:55:56,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:56,696 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-04-15 04:55:56,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:55:56,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-04-15 04:55:56,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:56,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:56,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:56,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:55:56,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-04-15 04:55:56,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:56,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:56,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:56,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-04-15 04:55:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:56,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:56,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-04-15 04:55:56,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896787285] [2021-04-15 04:55:56,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:55:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:55:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:55:56,843 INFO L87 Difference]: Start difference. First operand 1070 states and 2300 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:59,286 INFO L93 Difference]: Finished difference Result 3490 states and 7483 transitions. [2021-04-15 04:55:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:55:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 04:55:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:59,294 INFO L225 Difference]: With dead ends: 3490 [2021-04-15 04:55:59,295 INFO L226 Difference]: Without dead ends: 3246 [2021-04-15 04:55:59,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1771.0ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:55:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-04-15 04:55:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 1322. [2021-04-15 04:55:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.161998485995458) internal successors, (2856), 1321 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2856 transitions. [2021-04-15 04:55:59,316 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2856 transitions. Word has length 41 [2021-04-15 04:55:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:59,316 INFO L480 AbstractCegarLoop]: Abstraction has 1322 states and 2856 transitions. [2021-04-15 04:55:59,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2856 transitions. [2021-04-15 04:55:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 04:55:59,318 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:59,318 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:59,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:59,532 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-04-15 04:55:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:59,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398900314] [2021-04-15 04:55:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398900314] [2021-04-15 04:55:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619845158] [2021-04-15 04:55:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:59,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:55:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:55:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:00,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:00,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-04-15 04:56:00,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:00,399 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-04-15 04:56:00,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:56:00,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-04-15 04:56:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,806 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-04-15 04:56:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-04-15 04:56:00,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:00,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:00,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-04-15 04:56:00,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 04:56:00,960 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-04-15 04:56:00,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 04:56:00,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-04-15 04:56:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:01,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:01,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-04-15 04:56:01,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445292222] [2021-04-15 04:56:01,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-04-15 04:56:01,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-04-15 04:56:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:56:01,074 INFO L87 Difference]: Start difference. First operand 1322 states and 2856 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:04,569 INFO L93 Difference]: Finished difference Result 3408 states and 7345 transitions. [2021-04-15 04:56:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 04:56:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 04:56:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:04,574 INFO L225 Difference]: With dead ends: 3408 [2021-04-15 04:56:04,574 INFO L226 Difference]: Without dead ends: 3247 [2021-04-15 04:56:04,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2755.2ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 04:56:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-04-15 04:56:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 1451. [2021-04-15 04:56:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 2.1655172413793102) internal successors, (3140), 1450 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 3140 transitions. [2021-04-15 04:56:04,633 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 3140 transitions. Word has length 41 [2021-04-15 04:56:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:04,633 INFO L480 AbstractCegarLoop]: Abstraction has 1451 states and 3140 transitions. [2021-04-15 04:56:04,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 3140 transitions. [2021-04-15 04:56:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-04-15 04:56:04,636 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:04,636 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:56:04,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 04:56:04,857 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-04-15 04:56:04,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:04,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968279532] [2021-04-15 04:56:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968279532] [2021-04-15 04:56:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055924952] [2021-04-15 04:56:04,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:04,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:56:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:56:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:56:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:05,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:05,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-04-15 04:56:05,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441341750] [2021-04-15 04:56:05,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:56:05,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:56:05,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:56:05,070 INFO L87 Difference]: Start difference. First operand 1451 states and 3140 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:05,151 INFO L93 Difference]: Finished difference Result 1952 states and 4215 transitions. [2021-04-15 04:56:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:56:05,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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 45 [2021-04-15 04:56:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:05,155 INFO L225 Difference]: With dead ends: 1952 [2021-04-15 04:56:05,155 INFO L226 Difference]: Without dead ends: 1902 [2021-04-15 04:56:05,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:56:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-04-15 04:56:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1593. [2021-04-15 04:56:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 2.1777638190954773) internal successors, (3467), 1592 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 3467 transitions. [2021-04-15 04:56:05,175 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 3467 transitions. Word has length 45 [2021-04-15 04:56:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:05,175 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 3467 transitions. [2021-04-15 04:56:05,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 3467 transitions. [2021-04-15 04:56:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 04:56:05,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:05,178 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:56:05,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-04-15 04:56:05,390 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:05,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-04-15 04:56:05,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:05,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727375551] [2021-04-15 04:56:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-04-15 04:56:05,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727375551] [2021-04-15 04:56:05,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578987116] [2021-04-15 04:56:05,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:56:05,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:56:05,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:56:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:56:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-04-15 04:56:05,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-04-15 04:56:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135583413] [2021-04-15 04:56:05,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:56:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:56:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:56:05,580 INFO L87 Difference]: Start difference. First operand 1593 states and 3467 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:05,602 INFO L93 Difference]: Finished difference Result 2042 states and 4410 transitions. [2021-04-15 04:56:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:56:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 46 [2021-04-15 04:56:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:05,605 INFO L225 Difference]: With dead ends: 2042 [2021-04-15 04:56:05,605 INFO L226 Difference]: Without dead ends: 2042 [2021-04-15 04:56:05,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:56:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-04-15 04:56:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1283. [2021-04-15 04:56:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.1731669266770672) internal successors, (2786), 1282 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2786 transitions. [2021-04-15 04:56:05,624 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2786 transitions. Word has length 46 [2021-04-15 04:56:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:05,624 INFO L480 AbstractCegarLoop]: Abstraction has 1283 states and 2786 transitions. [2021-04-15 04:56:05,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2786 transitions. [2021-04-15 04:56:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 04:56:05,626 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:05,626 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:56:05,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 04:56:05,833 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:05,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-04-15 04:56:05,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:05,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241562574] [2021-04-15 04:56:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 04:56:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241562574] [2021-04-15 04:56:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040975728] [2021-04-15 04:56:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:05,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:56:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:56:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:56:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 04:56:05,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:05,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 04:56:05,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250566655] [2021-04-15 04:56:05,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:56:05,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:05,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:56:05,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:56:05,961 INFO L87 Difference]: Start difference. First operand 1283 states and 2786 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:05,986 INFO L93 Difference]: Finished difference Result 1442 states and 3092 transitions. [2021-04-15 04:56:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:56:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 04:56:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:05,988 INFO L225 Difference]: With dead ends: 1442 [2021-04-15 04:56:05,988 INFO L226 Difference]: Without dead ends: 1442 [2021-04-15 04:56:05,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:56:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-04-15 04:56:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1063. [2021-04-15 04:56:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.1534839924670433) internal successors, (2287), 1062 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2287 transitions. [2021-04-15 04:56:06,006 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2287 transitions. Word has length 46 [2021-04-15 04:56:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:06,006 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 2287 transitions. [2021-04-15 04:56:06,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2287 transitions. [2021-04-15 04:56:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-04-15 04:56:06,007 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:06,007 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:56:06,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-04-15 04:56:06,212 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-04-15 04:56:06,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:06,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574937251] [2021-04-15 04:56:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574937251] [2021-04-15 04:56:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265044491] [2021-04-15 04:56:06,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:06,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 04:56:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:07,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:07,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-04-15 04:56:07,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:07,520 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-04-15 04:56:07,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:56:07,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-04-15 04:56:07,978 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-04-15 04:56:07,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-04-15 04:56:07,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:07,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:07,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:56:07,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-04-15 04:56:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:07,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:07,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-04-15 04:56:07,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503364168] [2021-04-15 04:56:07,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-04-15 04:56:07,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-04-15 04:56:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:56:07,997 INFO L87 Difference]: Start difference. First operand 1063 states and 2287 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:11,614 INFO L93 Difference]: Finished difference Result 2509 states and 5340 transitions. [2021-04-15 04:56:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 04:56:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-04-15 04:56:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:11,618 INFO L225 Difference]: With dead ends: 2509 [2021-04-15 04:56:11,618 INFO L226 Difference]: Without dead ends: 2413 [2021-04-15 04:56:11,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2745.9ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:56:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-04-15 04:56:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1155. [2021-04-15 04:56:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.165511265164645) internal successors, (2499), 1154 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2499 transitions. [2021-04-15 04:56:11,634 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2499 transitions. Word has length 50 [2021-04-15 04:56:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:11,634 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 2499 transitions. [2021-04-15 04:56:11,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2499 transitions. [2021-04-15 04:56:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-04-15 04:56:11,636 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:11,636 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:56:11,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:11,850 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-04-15 04:56:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:11,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975119948] [2021-04-15 04:56:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:56:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975119948] [2021-04-15 04:56:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919949448] [2021-04-15 04:56:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:12,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:56:12,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:56:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 04:56:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:13,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:13,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-04-15 04:56:13,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:13,689 INFO L628 ElimStorePlain]: treesize reduction 92, result has 58.9 percent of original size [2021-04-15 04:56:13,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:56:13,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:52 [2021-04-15 04:56:13,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:56:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:56:13,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:56:13,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-04-15 04:56:13,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:13,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:13,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:56:13,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:5 [2021-04-15 04:56:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:13,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:13,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-04-15 04:56:13,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255985205] [2021-04-15 04:56:13,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-04-15 04:56:13,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-04-15 04:56:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:56:13,825 INFO L87 Difference]: Start difference. First operand 1155 states and 2499 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 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) [2021-04-15 04:56:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:20,147 INFO L93 Difference]: Finished difference Result 2988 states and 6336 transitions. [2021-04-15 04:56:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-04-15 04:56:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 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 50 [2021-04-15 04:56:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:20,152 INFO L225 Difference]: With dead ends: 2988 [2021-04-15 04:56:20,152 INFO L226 Difference]: Without dead ends: 2875 [2021-04-15 04:56:20,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4157.1ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-04-15 04:56:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-04-15 04:56:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1493. [2021-04-15 04:56:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 2.148793565683646) internal successors, (3206), 1492 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 3206 transitions. [2021-04-15 04:56:20,181 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 3206 transitions. Word has length 50 [2021-04-15 04:56:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:20,181 INFO L480 AbstractCegarLoop]: Abstraction has 1493 states and 3206 transitions. [2021-04-15 04:56:20,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 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) [2021-04-15 04:56:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 3206 transitions. [2021-04-15 04:56:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-04-15 04:56:20,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:20,184 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:56:20,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-04-15 04:56:20,397 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-04-15 04:56:20,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:20,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470228977] [2021-04-15 04:56:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:56:20,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470228977] [2021-04-15 04:56:20,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790368819] [2021-04-15 04:56:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:21,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:56:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:56:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:56:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:23,872 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:56:24,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:24,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-04-15 04:56:24,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:24,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-04-15 04:56:24,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:24,324 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2021-04-15 04:56:24,325 INFO L628 ElimStorePlain]: treesize reduction 122, result has 69.7 percent of original size [2021-04-15 04:56:24,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-04-15 04:56:24,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:151 [2021-04-15 04:56:37,039 WARN L205 SmtUtils]: Spent 8.31 s on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:57:10,414 WARN L205 SmtUtils]: Spent 17.05 s on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-04-15 04:57:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:57:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:57:10,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:57:10,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:57:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-04-15 04:57:11,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-04-15 04:57:11,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:57:11,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:57:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:57:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:57:11,988 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-04-15 04:57:11,989 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-04-15 04:57:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-04-15 04:57:12,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:57:12,796 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 73 [2021-04-15 04:57:12,796 INFO L628 ElimStorePlain]: treesize reduction 1648, result has 9.0 percent of original size [2021-04-15 04:57:12,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 04:57:12,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-04-15 04:57:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:57:12,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:57:12,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-04-15 04:57:12,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060271149] [2021-04-15 04:57:12,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-04-15 04:57:12,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:57:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-04-15 04:57:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2264, Unknown=7, NotChecked=0, Total=2550 [2021-04-15 04:57:12,969 INFO L87 Difference]: Start difference. First operand 1493 states and 3206 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:57:34,402 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 40 [2021-04-15 04:57:42,892 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 144 DAG size of output: 42 [2021-04-15 04:57:49,691 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-04-15 04:58:00,534 WARN L205 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 111 DAG size of output: 66 [2021-04-15 04:58:04,168 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-04-15 04:58:12,739 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-04-15 04:58:22,193 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-04-15 04:58:28,682 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 135 DAG size of output: 44 [2021-04-15 04:58:38,919 WARN L205 SmtUtils]: Spent 5.08 s on a formula simplification. DAG size of input: 127 DAG size of output: 70 [2021-04-15 04:58:45,802 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 125 DAG size of output: 64 [2021-04-15 04:58:55,156 WARN L205 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-04-15 04:59:07,388 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 54 [2021-04-15 04:59:14,712 WARN L205 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 124 DAG size of output: 65 [2021-04-15 04:59:19,830 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 127 DAG size of output: 66 [2021-04-15 04:59:34,403 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 51 [2021-04-15 04:59:40,084 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 66 [2021-04-15 04:59:44,924 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-04-15 05:00:04,184 WARN L205 SmtUtils]: Spent 10.26 s on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-04-15 05:00:11,620 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-04-15 05:00:16,445 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2021-04-15 05:00:40,935 WARN L205 SmtUtils]: Spent 10.73 s on a formula simplification. DAG size of input: 126 DAG size of output: 63 [2021-04-15 05:00:54,703 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 132 DAG size of output: 69 [2021-04-15 05:01:12,196 WARN L205 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 128 DAG size of output: 71 [2021-04-15 05:01:26,815 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2021-04-15 05:01:43,133 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 56 [2021-04-15 05:01:54,713 WARN L205 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-04-15 05:02:11,699 WARN L205 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 131 DAG size of output: 64 [2021-04-15 05:02:33,280 WARN L205 SmtUtils]: Spent 7.10 s on a formula simplification. DAG size of input: 111 DAG size of output: 62 [2021-04-15 05:02:34,976 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 58 [2021-04-15 05:03:01,095 WARN L205 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 131 DAG size of output: 66 [2021-04-15 05:03:27,035 WARN L205 SmtUtils]: Spent 11.51 s on a formula simplification. DAG size of input: 121 DAG size of output: 67 [2021-04-15 05:03:46,690 WARN L205 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 136 DAG size of output: 66 [2021-04-15 05:03:57,737 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-04-15 05:04:06,486 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-04-15 05:04:33,599 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 56 [2021-04-15 05:05:05,532 WARN L205 SmtUtils]: Spent 10.54 s on a formula simplification. DAG size of input: 118 DAG size of output: 62 [2021-04-15 05:05:15,533 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-04-15 05:05:22,532 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-04-15 05:05:36,628 WARN L205 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-04-15 05:06:23,074 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2021-04-15 05:06:41,337 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2021-04-15 05:06:45,935 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-04-15 05:06:55,400 WARN L205 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-04-15 05:07:03,778 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-04-15 05:07:28,252 WARN L205 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 121 DAG size of output: 66 [2021-04-15 05:07:31,797 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-04-15 05:07:53,324 WARN L205 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2021-04-15 05:08:21,654 WARN L205 SmtUtils]: Spent 9.21 s on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-04-15 05:08:57,260 WARN L205 SmtUtils]: Spent 6.64 s on a formula simplification. DAG size of input: 123 DAG size of output: 68 [2021-04-15 05:09:00,350 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 05:09:12,779 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-04-15 05:09:26,612 WARN L205 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 Received shutdown request... [2021-04-15 05:09:55,945 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-04-15 05:09:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-04-15 05:09:56,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:56,147 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:09:56,150 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:09:56,150 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:09:56 BasicIcfg [2021-04-15 05:09:56,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:09:56,160 INFO L168 Benchmark]: Toolchain (without parser) took 878995.65 ms. Allocated memory was 255.9 MB in the beginning and 494.9 MB in the end (delta: 239.1 MB). Free memory was 236.6 MB in the beginning and 459.1 MB in the end (delta: -222.6 MB). Peak memory consumption was 293.8 MB. Max. memory is 16.0 GB. [2021-04-15 05:09:56,161 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:09:56,161 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.14 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:09:56,161 INFO L168 Benchmark]: Boogie Preprocessor took 10.00 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:09:56,161 INFO L168 Benchmark]: RCFGBuilder took 213.23 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-04-15 05:09:56,161 INFO L168 Benchmark]: TraceAbstraction took 878750.86 ms. Allocated memory was 255.9 MB in the beginning and 494.9 MB in the end (delta: 239.1 MB). Free memory was 235.4 MB in the beginning and 459.1 MB in the end (delta: -223.7 MB). Peak memory consumption was 290.6 MB. Max. memory is 16.0 GB. [2021-04-15 05:09:56,161 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.14 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.00 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 213.23 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 878750.86 ms. Allocated memory was 255.9 MB in the beginning and 494.9 MB in the end (delta: 239.1 MB). Free memory was 235.4 MB in the beginning and 459.1 MB in the end (delta: -223.7 MB). Peak memory consumption was 290.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 62). Cancelled while BasicCegarLoop was constructing difference of abstraction (1493states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 106 for 4354ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 878682.3ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 37.5ms, AutomataDifference: 803816.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1113 SDtfs, 5061 SDslu, 11931 SDs, 0 SdLazy, 29466 SolverSat, 3136 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 132386.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1815 GetRequests, 602 SyntacticMatches, 30 SemanticMatches, 1182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36764 ImplicationChecksByTransitivity, 697025.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1593occurred in iteration=18, InterpolantAutomatonStates: 764, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 386.1ms AutomataMinimizationTime, 22 MinimizatonAttempts, 18921 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 102.4ms SsaConstructionTime, 419.4ms SatisfiabilityAnalysisTime, 69037.9ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 300 QuantifiedInterpolants, 27384 SizeOfPredicates, 226 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 542 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 262/1315 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