/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:35:08,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:35:08,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:35:08,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:35:08,192 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-Separate.epf [2021-06-05 15:35:08,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:35:08,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:35:08,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:35:08,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:35:08,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:35:08,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:35:08,230 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:35:08,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:35:08,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:35:08,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:35:08,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:35:08,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:35:08,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:35:08,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:35:08,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:35:08,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:35:08,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:35:08,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:35:08,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:35:08,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:35:08,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:35:08,236 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:35:08,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:35:08,236 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:35:08,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:35:08,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:35:08,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:35:08,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:35:08,570 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:35:08,571 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:35:08,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-06-05 15:35:08,572 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-06-05 15:35:08,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:35:08,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:35:08,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:35:08,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:35:08,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:35:08,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:35:08,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:35:08,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:35:08,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:35:08,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/1) ... [2021-06-05 15:35:08,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:35:08,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:35:08,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:35:08,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:35:08,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (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 [2021-06-05 15:35:08,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:35:08,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:35:08,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:35:08,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:35:08,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:35:08,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:35:08,769 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:35:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:35:08,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:35:08,770 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:35:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:35:08,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:35:08,771 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:35:08,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:35:08,992 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:35:08,993 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:35:08 BoogieIcfgContainer [2021-06-05 15:35:08,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:35:08,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:35:08,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:35:08,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:35:08,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:08" (1/2) ... [2021-06-05 15:35:08,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff8a983 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:35:08, skipping insertion in model container [2021-06-05 15:35:08,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:35:08" (2/2) ... [2021-06-05 15:35:08,999 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-06-05 15:35:09,004 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:35:09,004 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:35:09,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:35:09,005 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:35:09,046 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:35:09,065 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:35:09,098 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:35:09,098 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:35:09,099 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:35:09,099 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:35:09,099 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:35:09,099 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:35:09,099 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:35:09,099 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:35:09,113 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2021-06-05 15:35:09,141 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:35:09,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:09,156 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:09,157 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash -718559117, now seen corresponding path program 1 times [2021-06-05 15:35:09,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:09,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006740699] [2021-06-05 15:35:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:09,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:09,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006740699] [2021-06-05 15:35:09,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006740699] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:09,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:09,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:35:09,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104521717] [2021-06-05 15:35:09,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:35:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:35:09,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:09,334 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:09,387 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2021-06-05 15:35:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:35:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:35:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:09,396 INFO L225 Difference]: With dead ends: 172 [2021-06-05 15:35:09,396 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 15:35:09,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 15:35:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-06-05 15:35:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2021-06-05 15:35:09,435 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2021-06-05 15:35:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:09,436 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2021-06-05 15:35:09,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2021-06-05 15:35:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:35:09,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:09,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:09,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:35:09,438 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash -123901407, now seen corresponding path program 2 times [2021-06-05 15:35:09,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:09,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708547315] [2021-06-05 15:35:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:09,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:09,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708547315] [2021-06-05 15:35:09,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708547315] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:09,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:09,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:35:09,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715036660] [2021-06-05 15:35:09,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:35:09,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:09,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:35:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:09,479 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:09,540 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2021-06-05 15:35:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:35:09,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:35:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:09,544 INFO L225 Difference]: With dead ends: 190 [2021-06-05 15:35:09,544 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 15:35:09,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:35:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 15:35:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-06-05 15:35:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2021-06-05 15:35:09,564 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2021-06-05 15:35:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:09,565 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2021-06-05 15:35:09,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2021-06-05 15:35:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:35:09,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:09,566 INFO L521 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] [2021-06-05 15:35:09,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:35:09,567 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1960072514, now seen corresponding path program 1 times [2021-06-05 15:35:09,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:09,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822437668] [2021-06-05 15:35:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:09,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:09,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822437668] [2021-06-05 15:35:09,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822437668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:09,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:09,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:35:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814611347] [2021-06-05 15:35:09,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:35:09,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:35:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:09,606 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:09,615 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2021-06-05 15:35:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:35:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:35:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:09,621 INFO L225 Difference]: With dead ends: 164 [2021-06-05 15:35:09,621 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 15:35:09,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 15:35:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-06-05 15:35:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2021-06-05 15:35:09,637 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2021-06-05 15:35:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:09,637 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2021-06-05 15:35:09,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2021-06-05 15:35:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:35:09,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:09,639 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:09,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:35:09,639 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash -480736564, now seen corresponding path program 1 times [2021-06-05 15:35:09,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:09,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647311438] [2021-06-05 15:35:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:09,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:09,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647311438] [2021-06-05 15:35:09,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647311438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:09,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629489262] [2021-06-05 15:35:09,777 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 [2021-06-05 15:35:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:35:09,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:10,191 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 [2021-06-05 15:35:10,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:10,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:10,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:10,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 15:35:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:10,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629489262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:10,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:10,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:35:10,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80152778] [2021-06-05 15:35:10,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:35:10,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:35:10,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:35:10,334 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2021-06-05 15:35:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:10,589 INFO L93 Difference]: Finished difference Result 302 states and 708 transitions. [2021-06-05 15:35:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:35:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 25 [2021-06-05 15:35:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:10,593 INFO L225 Difference]: With dead ends: 302 [2021-06-05 15:35:10,593 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 15:35:10,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:35:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 15:35:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2021-06-05 15:35:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2021-06-05 15:35:10,620 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2021-06-05 15:35:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:10,621 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2021-06-05 15:35:10,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2021-06-05 15:35:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2021-06-05 15:35:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:35:10,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:10,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:10,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:10,824 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1527967927, now seen corresponding path program 2 times [2021-06-05 15:35:10,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:10,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730378597] [2021-06-05 15:35:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:10,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:10,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730378597] [2021-06-05 15:35:10,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730378597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:10,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365136786] [2021-06-05 15:35:10,881 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 [2021-06-05 15:35:10,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:35:10,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:35:10,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365136786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:10,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:10,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:35:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881783848] [2021-06-05 15:35:10,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:35:10,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:10,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:35:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:10,980 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:10,993 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2021-06-05 15:35:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:35:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:35:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:10,996 INFO L225 Difference]: With dead ends: 496 [2021-06-05 15:35:10,996 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 15:35:10,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 15:35:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-06-05 15:35:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2021-06-05 15:35:11,010 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2021-06-05 15:35:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:11,010 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2021-06-05 15:35:11,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2021-06-05 15:35:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:11,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:11,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:11,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:11,235 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:11,235 INFO L82 PathProgramCache]: Analyzing trace with hash 703493603, now seen corresponding path program 3 times [2021-06-05 15:35:11,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:11,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394630734] [2021-06-05 15:35:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:11,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:11,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394630734] [2021-06-05 15:35:11,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394630734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:11,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264476537] [2021-06-05 15:35:11,467 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 [2021-06-05 15:35:11,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:35:11,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:35:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:11,814 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:11,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:35:11,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:11,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:11,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:11,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:11,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264476537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:11,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:11,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:35:11,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763282531] [2021-06-05 15:35:11,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:35:11,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:35:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:35:11,908 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:14,344 INFO L93 Difference]: Finished difference Result 1720 states and 4262 transitions. [2021-06-05 15:35:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:35:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:14,351 INFO L225 Difference]: With dead ends: 1720 [2021-06-05 15:35:14,351 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 15:35:14,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2051.3ms TimeCoverageRelationStatistics Valid=1330, Invalid=5642, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:35:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 15:35:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 409. [2021-06-05 15:35:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.4534313725490198) internal successors, (1001), 408 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1001 transitions. [2021-06-05 15:35:14,381 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1001 transitions. Word has length 31 [2021-06-05 15:35:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:14,381 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1001 transitions. [2021-06-05 15:35:14,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1001 transitions. [2021-06-05 15:35:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:14,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:14,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:14,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:14,605 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1642327051, now seen corresponding path program 4 times [2021-06-05 15:35:14,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:14,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276992420] [2021-06-05 15:35:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:14,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276992420] [2021-06-05 15:35:14,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276992420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243814921] [2021-06-05 15:35:14,841 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 [2021-06-05 15:35:14,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:35:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:35:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:15,129 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:35:15,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:15,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:15,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:15,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:15,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243814921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:15,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:15,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:35:15,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432829054] [2021-06-05 15:35:15,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:35:15,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:35:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:35:15,200 INFO L87 Difference]: Start difference. First operand 409 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:16,980 INFO L93 Difference]: Finished difference Result 1293 states and 3137 transitions. [2021-06-05 15:35:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:35:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:16,986 INFO L225 Difference]: With dead ends: 1293 [2021-06-05 15:35:16,986 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 15:35:16,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1622.3ms TimeCoverageRelationStatistics Valid=1047, Invalid=4065, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:35:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 15:35:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 413. [2021-06-05 15:35:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.4490291262135924) internal successors, (1009), 412 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1009 transitions. [2021-06-05 15:35:17,004 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1009 transitions. Word has length 31 [2021-06-05 15:35:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:17,004 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1009 transitions. [2021-06-05 15:35:17,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1009 transitions. [2021-06-05 15:35:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:17,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:17,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:17,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:17,229 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1488152547, now seen corresponding path program 5 times [2021-06-05 15:35:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:17,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192282049] [2021-06-05 15:35:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:17,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192282049] [2021-06-05 15:35:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192282049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:17,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223012008] [2021-06-05 15:35:17,452 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 [2021-06-05 15:35:17,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:35:17,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:17,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:35:17,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:17,734 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:17,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:35:17,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:17,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:17,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:17,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223012008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:17,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:17,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:35:17,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323269884] [2021-06-05 15:35:17,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:35:17,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:35:17,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:35:17,806 INFO L87 Difference]: Start difference. First operand 413 states and 1009 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:20,163 INFO L93 Difference]: Finished difference Result 3428 states and 8347 transitions. [2021-06-05 15:35:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:35:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:20,174 INFO L225 Difference]: With dead ends: 3428 [2021-06-05 15:35:20,174 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 15:35:20,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 2062.4ms TimeCoverageRelationStatistics Valid=1636, Invalid=7106, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:35:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 15:35:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 445. [2021-06-05 15:35:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.463963963963964) internal successors, (1094), 444 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1094 transitions. [2021-06-05 15:35:20,201 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1094 transitions. Word has length 31 [2021-06-05 15:35:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:20,203 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1094 transitions. [2021-06-05 15:35:20,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1094 transitions. [2021-06-05 15:35:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:20,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:20,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:20,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:35:20,427 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1925512583, now seen corresponding path program 6 times [2021-06-05 15:35:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:20,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070302836] [2021-06-05 15:35:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:35:20,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:20,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070302836] [2021-06-05 15:35:20,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070302836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:20,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386350894] [2021-06-05 15:35:20,610 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 [2021-06-05 15:35:20,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:35:20,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:35:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:20,876 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:20,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:35:20,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:20,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:20,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:20,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386350894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:20,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:20,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:35:20,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410087888] [2021-06-05 15:35:20,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:35:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:20,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:35:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:35:20,943 INFO L87 Difference]: Start difference. First operand 445 states and 1094 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:23,254 INFO L93 Difference]: Finished difference Result 2497 states and 6083 transitions. [2021-06-05 15:35:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:35:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:23,263 INFO L225 Difference]: With dead ends: 2497 [2021-06-05 15:35:23,263 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 15:35:23,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1997.4ms TimeCoverageRelationStatistics Valid=1578, Invalid=6978, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 15:35:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 15:35:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 573. [2021-06-05 15:35:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.4737762237762237) internal successors, (1415), 572 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1415 transitions. [2021-06-05 15:35:23,287 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1415 transitions. Word has length 31 [2021-06-05 15:35:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:23,288 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1415 transitions. [2021-06-05 15:35:23,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1415 transitions. [2021-06-05 15:35:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:23,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:23,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:23,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:35:23,512 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash -879696673, now seen corresponding path program 7 times [2021-06-05 15:35:23,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:23,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336541418] [2021-06-05 15:35:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:23,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:23,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336541418] [2021-06-05 15:35:23,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336541418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:23,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545875726] [2021-06-05 15:35:23,709 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 [2021-06-05 15:35:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:35:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:23,950 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:23,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:35:23,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:23,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:23,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:23,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:24,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545875726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:24,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:24,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:35:24,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001042193] [2021-06-05 15:35:24,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:35:24,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:35:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:35:24,011 INFO L87 Difference]: Start difference. First operand 573 states and 1415 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:25,807 INFO L93 Difference]: Finished difference Result 2289 states and 5693 transitions. [2021-06-05 15:35:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:35:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:25,813 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 15:35:25,813 INFO L226 Difference]: Without dead ends: 1584 [2021-06-05 15:35:25,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1595.7ms TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:35:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-05 15:35:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 605. [2021-06-05 15:35:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.468543046357616) internal successors, (1491), 604 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1491 transitions. [2021-06-05 15:35:25,833 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1491 transitions. Word has length 31 [2021-06-05 15:35:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:25,833 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1491 transitions. [2021-06-05 15:35:25,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1491 transitions. [2021-06-05 15:35:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:25,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:25,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:26,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:26,049 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash 320665773, now seen corresponding path program 8 times [2021-06-05 15:35:26,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:26,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869167065] [2021-06-05 15:35:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:35:26,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869167065] [2021-06-05 15:35:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869167065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010635784] [2021-06-05 15:35:26,237 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 [2021-06-05 15:35:26,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:35:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:35:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:26,486 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:35:26,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:26,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:26,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:26,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:26,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010635784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:26,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:26,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:35:26,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209633061] [2021-06-05 15:35:26,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:35:26,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:35:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:35:26,550 INFO L87 Difference]: Start difference. First operand 605 states and 1491 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:28,074 INFO L93 Difference]: Finished difference Result 2332 states and 5648 transitions. [2021-06-05 15:35:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:35:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:28,081 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 15:35:28,081 INFO L226 Difference]: Without dead ends: 1883 [2021-06-05 15:35:28,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1333.7ms TimeCoverageRelationStatistics Valid=1008, Invalid=4248, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:35:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-06-05 15:35:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 643. [2021-06-05 15:35:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.454828660436137) internal successors, (1576), 642 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1576 transitions. [2021-06-05 15:35:28,103 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1576 transitions. Word has length 31 [2021-06-05 15:35:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:28,103 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1576 transitions. [2021-06-05 15:35:28,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1576 transitions. [2021-06-05 15:35:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:35:28,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:28,105 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:28,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:35:28,329 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2067503680, now seen corresponding path program 9 times [2021-06-05 15:35:28,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:28,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523059269] [2021-06-05 15:35:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:28,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:28,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523059269] [2021-06-05 15:35:28,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523059269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:28,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488217305] [2021-06-05 15:35:28,366 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 [2021-06-05 15:35:28,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:35:28,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:35:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:28,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488217305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:28,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:28,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:35:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948376778] [2021-06-05 15:35:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:35:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:35:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:35:28,471 INFO L87 Difference]: Start difference. First operand 643 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:28,485 INFO L93 Difference]: Finished difference Result 1162 states and 2791 transitions. [2021-06-05 15:35:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:35:28,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:35:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:28,489 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 15:35:28,489 INFO L226 Difference]: Without dead ends: 1105 [2021-06-05 15:35:28,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:35:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-05 15:35:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 768. [2021-06-05 15:35:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.4771838331160363) internal successors, (1900), 767 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1900 transitions. [2021-06-05 15:35:28,506 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1900 transitions. Word has length 34 [2021-06-05 15:35:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:28,506 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 1900 transitions. [2021-06-05 15:35:28,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1900 transitions. [2021-06-05 15:35:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:28,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:28,508 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:28,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 15:35:28,729 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 774999660, now seen corresponding path program 10 times [2021-06-05 15:35:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:28,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805674811] [2021-06-05 15:35:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:29,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:29,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805674811] [2021-06-05 15:35:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805674811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545246808] [2021-06-05 15:35:29,005 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 [2021-06-05 15:35:29,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:35:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:35:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:29,388 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:35:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:35:29,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:29,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:29,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:29,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:35:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545246808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:29,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:29,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 15:35:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656746214] [2021-06-05 15:35:29,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:35:29,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:29,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:35:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:35:29,464 INFO L87 Difference]: Start difference. First operand 768 states and 1900 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:33,826 INFO L93 Difference]: Finished difference Result 4022 states and 9925 transitions. [2021-06-05 15:35:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 15:35:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:35:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:33,840 INFO L225 Difference]: With dead ends: 4022 [2021-06-05 15:35:33,840 INFO L226 Difference]: Without dead ends: 3406 [2021-06-05 15:35:33,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3563.5ms TimeCoverageRelationStatistics Valid=2702, Invalid=15120, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 15:35:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-06-05 15:35:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 917. [2021-06-05 15:35:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.5010917030567685) internal successors, (2291), 916 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2291 transitions. [2021-06-05 15:35:33,873 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2291 transitions. Word has length 37 [2021-06-05 15:35:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:33,873 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2291 transitions. [2021-06-05 15:35:33,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2291 transitions. [2021-06-05 15:35:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:33,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:33,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:34,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:35:34,089 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1677954198, now seen corresponding path program 11 times [2021-06-05 15:35:34,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:34,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792569158] [2021-06-05 15:35:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:34,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792569158] [2021-06-05 15:35:34,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792569158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926387986] [2021-06-05 15:35:34,322 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 [2021-06-05 15:35:34,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:35:34,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:35:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:34,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:35:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:34,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:35:34,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:35:34,846 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:35:34,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:34,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:34,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:34,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 15:35:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:34,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926387986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:34,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:34,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 15:35:34,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023461535] [2021-06-05 15:35:34,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:35:34,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:35:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:35:34,944 INFO L87 Difference]: Start difference. First operand 917 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:35:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:40,459 INFO L93 Difference]: Finished difference Result 6772 states and 16848 transitions. [2021-06-05 15:35:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 15:35:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-06-05 15:35:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:40,478 INFO L225 Difference]: With dead ends: 6772 [2021-06-05 15:35:40,478 INFO L226 Difference]: Without dead ends: 5574 [2021-06-05 15:35:40,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 4619.6ms TimeCoverageRelationStatistics Valid=3398, Invalid=18064, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 15:35:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-06-05 15:35:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 1099. [2021-06-05 15:35:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 2.517304189435337) internal successors, (2764), 1098 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 2764 transitions. [2021-06-05 15:35:40,517 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 2764 transitions. Word has length 37 [2021-06-05 15:35:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:40,517 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 2764 transitions. [2021-06-05 15:35:40,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:35:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 2764 transitions. [2021-06-05 15:35:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:40,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:40,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:40,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:40,733 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916204, now seen corresponding path program 12 times [2021-06-05 15:35:40,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:40,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602705025] [2021-06-05 15:35:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:41,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:41,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602705025] [2021-06-05 15:35:41,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602705025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:41,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730292572] [2021-06-05 15:35:41,019 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 [2021-06-05 15:35:41,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:35:41,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:35:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:41,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:35:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:35:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:35:41,686 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 30 treesize of output 18 [2021-06-05 15:35:41,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:41,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:41,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:41,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:10 [2021-06-05 15:35:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:41,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730292572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:41,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:41,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 15:35:41,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825355195] [2021-06-05 15:35:41,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:35:41,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:35:41,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:35:41,807 INFO L87 Difference]: Start difference. First operand 1099 states and 2764 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:35:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:47,180 INFO L93 Difference]: Finished difference Result 5656 states and 14216 transitions. [2021-06-05 15:35:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 15:35:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-06-05 15:35:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:47,191 INFO L225 Difference]: With dead ends: 5656 [2021-06-05 15:35:47,191 INFO L226 Difference]: Without dead ends: 5239 [2021-06-05 15:35:47,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 4395.5ms TimeCoverageRelationStatistics Valid=2865, Invalid=16595, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 15:35:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-06-05 15:35:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 1221. [2021-06-05 15:35:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.533606557377049) internal successors, (3091), 1220 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3091 transitions. [2021-06-05 15:35:47,238 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3091 transitions. Word has length 37 [2021-06-05 15:35:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:47,239 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3091 transitions. [2021-06-05 15:35:47,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:35:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3091 transitions. [2021-06-05 15:35:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:47,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:47,242 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:47,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:47,457 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1799631944, now seen corresponding path program 13 times [2021-06-05 15:35:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:47,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966291875] [2021-06-05 15:35:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:35:47,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966291875] [2021-06-05 15:35:47,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966291875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847505983] [2021-06-05 15:35:47,665 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 [2021-06-05 15:35:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:47,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:35:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:48,111 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:35:48,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:35:48,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:48,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:48,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:48,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:35:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847505983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:48,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:48,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 15:35:48,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858872330] [2021-06-05 15:35:48,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:35:48,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:35:48,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:35:48,176 INFO L87 Difference]: Start difference. First operand 1221 states and 3091 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:53,066 INFO L93 Difference]: Finished difference Result 7387 states and 18497 transitions. [2021-06-05 15:35:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 15:35:53,066 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:35:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:53,079 INFO L225 Difference]: With dead ends: 7387 [2021-06-05 15:35:53,079 INFO L226 Difference]: Without dead ends: 6259 [2021-06-05 15:35:53,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8391 ImplicationChecksByTransitivity, 4142.7ms TimeCoverageRelationStatistics Valid=3701, Invalid=18649, Unknown=0, NotChecked=0, Total=22350 [2021-06-05 15:35:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2021-06-05 15:35:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 1453. [2021-06-05 15:35:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.548898071625344) internal successors, (3701), 1452 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3701 transitions. [2021-06-05 15:35:53,133 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3701 transitions. Word has length 37 [2021-06-05 15:35:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:53,134 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 3701 transitions. [2021-06-05 15:35:53,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3701 transitions. [2021-06-05 15:35:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:53,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:53,137 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:53,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:35:53,361 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:53,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1710676408, now seen corresponding path program 14 times [2021-06-05 15:35:53,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:53,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008047552] [2021-06-05 15:35:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:53,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:53,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008047552] [2021-06-05 15:35:53,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008047552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:53,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151244581] [2021-06-05 15:35:53,617 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 [2021-06-05 15:35:53,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:35:53,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:35:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:54,042 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:35:54,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:35:54,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:54,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:54,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:35:54,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:35:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:54,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151244581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:54,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:54,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 15:35:54,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085559339] [2021-06-05 15:35:54,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:35:54,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:54,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:35:54,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:35:54,125 INFO L87 Difference]: Start difference. First operand 1453 states and 3701 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-06-05 15:35:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:59,186 INFO L93 Difference]: Finished difference Result 9364 states and 23545 transitions. [2021-06-05 15:35:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 15:35:59,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-06-05 15:35:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:59,199 INFO L225 Difference]: With dead ends: 9364 [2021-06-05 15:35:59,199 INFO L226 Difference]: Without dead ends: 8006 [2021-06-05 15:35:59,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 4228.3ms TimeCoverageRelationStatistics Valid=3731, Invalid=21709, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 15:35:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-06-05 15:35:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 2053. [2021-06-05 15:35:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.574561403508772) internal successors, (5283), 2052 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5283 transitions. [2021-06-05 15:35:59,284 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5283 transitions. Word has length 37 [2021-06-05 15:35:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:59,284 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5283 transitions. [2021-06-05 15:35:59,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-06-05 15:35:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5283 transitions. [2021-06-05 15:35:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:59,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:59,288 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:59,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:59,511 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1273316372, now seen corresponding path program 15 times [2021-06-05 15:35:59,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:59,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140245824] [2021-06-05 15:35:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:35:59,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140245824] [2021-06-05 15:35:59,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140245824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716328242] [2021-06-05 15:35:59,721 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 [2021-06-05 15:35:59,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:35:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:59,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:35:59,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:00,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:00,196 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 38 treesize of output 18 [2021-06-05 15:36:00,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:00,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:00,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:00,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 15:36:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:00,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716328242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:00,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:00,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-06-05 15:36:00,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721314239] [2021-06-05 15:36:00,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:36:00,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:36:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:36:00,279 INFO L87 Difference]: Start difference. First operand 2053 states and 5283 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-06-05 15:36:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:04,067 INFO L93 Difference]: Finished difference Result 8726 states and 22162 transitions. [2021-06-05 15:36:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 15:36:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 37 [2021-06-05 15:36:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:04,076 INFO L225 Difference]: With dead ends: 8726 [2021-06-05 15:36:04,076 INFO L226 Difference]: Without dead ends: 7790 [2021-06-05 15:36:04,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3209.3ms TimeCoverageRelationStatistics Valid=2541, Invalid=15015, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 15:36:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-06-05 15:36:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 2539. [2021-06-05 15:36:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 2.602442868400315) internal successors, (6605), 2538 states have internal predecessors, (6605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 6605 transitions. [2021-06-05 15:36:04,161 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 6605 transitions. Word has length 37 [2021-06-05 15:36:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:04,161 INFO L482 AbstractCegarLoop]: Abstraction has 2539 states and 6605 transitions. [2021-06-05 15:36:04,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-06-05 15:36:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 6605 transitions. [2021-06-05 15:36:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:04,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:04,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:04,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:04,381 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1801064030, now seen corresponding path program 16 times [2021-06-05 15:36:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:04,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916254982] [2021-06-05 15:36:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:04,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:04,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916254982] [2021-06-05 15:36:04,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916254982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:04,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450720504] [2021-06-05 15:36:04,663 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 [2021-06-05 15:36:04,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:36:04,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:36:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:05,068 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:05,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:05,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:05,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:05,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:05,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:05,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450720504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:05,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:05,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 15:36:05,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246604600] [2021-06-05 15:36:05,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:36:05,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:36:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:36:05,142 INFO L87 Difference]: Start difference. First operand 2539 states and 6605 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:09,109 INFO L93 Difference]: Finished difference Result 9458 states and 24261 transitions. [2021-06-05 15:36:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 15:36:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:36:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:09,121 INFO L225 Difference]: With dead ends: 9458 [2021-06-05 15:36:09,121 INFO L226 Difference]: Without dead ends: 8487 [2021-06-05 15:36:09,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 3420.7ms TimeCoverageRelationStatistics Valid=2478, Invalid=14552, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 15:36:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8487 states. [2021-06-05 15:36:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8487 to 2847. [2021-06-05 15:36:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.600843288826423) internal successors, (7402), 2846 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7402 transitions. [2021-06-05 15:36:09,195 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7402 transitions. Word has length 37 [2021-06-05 15:36:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:09,195 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 7402 transitions. [2021-06-05 15:36:09,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7402 transitions. [2021-06-05 15:36:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:09,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:09,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:09,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:09,402 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:09,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1293540820, now seen corresponding path program 17 times [2021-06-05 15:36:09,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:09,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447477147] [2021-06-05 15:36:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:36:09,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447477147] [2021-06-05 15:36:09,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447477147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228546657] [2021-06-05 15:36:09,658 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:09,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:36:09,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 15:36:09,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:10,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:10,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:10,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:10,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:10,215 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 32 treesize of output 18 [2021-06-05 15:36:10,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:10,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:10,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:10,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:10 [2021-06-05 15:36:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:10,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228546657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:10,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:10,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-06-05 15:36:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7710006] [2021-06-05 15:36:10,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:36:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:36:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:36:10,300 INFO L87 Difference]: Start difference. First operand 2847 states and 7402 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-06-05 15:36:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:14,014 INFO L93 Difference]: Finished difference Result 9180 states and 23382 transitions. [2021-06-05 15:36:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 15:36:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 37 [2021-06-05 15:36:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:14,022 INFO L225 Difference]: With dead ends: 9180 [2021-06-05 15:36:14,022 INFO L226 Difference]: Without dead ends: 8400 [2021-06-05 15:36:14,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 3048.3ms TimeCoverageRelationStatistics Valid=2057, Invalid=12463, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 15:36:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2021-06-05 15:36:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 3079. [2021-06-05 15:36:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.602014294996751) internal successors, (8009), 3078 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8009 transitions. [2021-06-05 15:36:14,100 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8009 transitions. Word has length 37 [2021-06-05 15:36:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:14,100 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8009 transitions. [2021-06-05 15:36:14,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-06-05 15:36:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8009 transitions. [2021-06-05 15:36:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:14,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:14,105 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:14,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:36:14,325 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1590603224, now seen corresponding path program 18 times [2021-06-05 15:36:14,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:14,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225551860] [2021-06-05 15:36:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:14,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:14,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225551860] [2021-06-05 15:36:14,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225551860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:14,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651595892] [2021-06-05 15:36:14,534 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 [2021-06-05 15:36:14,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:36:14,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:36:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:14,897 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:14,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:14,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:14,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:14,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651595892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:14,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:14,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 15:36:14,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718912360] [2021-06-05 15:36:14,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:36:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:36:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:36:14,979 INFO L87 Difference]: Start difference. First operand 3079 states and 8009 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:36:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:18,221 INFO L93 Difference]: Finished difference Result 9460 states and 24220 transitions. [2021-06-05 15:36:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 15:36:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-06-05 15:36:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:18,230 INFO L225 Difference]: With dead ends: 9460 [2021-06-05 15:36:18,230 INFO L226 Difference]: Without dead ends: 8811 [2021-06-05 15:36:18,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4494 ImplicationChecksByTransitivity, 2988.8ms TimeCoverageRelationStatistics Valid=2347, Invalid=10993, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 15:36:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8811 states. [2021-06-05 15:36:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8811 to 3651. [2021-06-05 15:36:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3650 states have (on average 2.5695890410958904) internal successors, (9379), 3650 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 9379 transitions. [2021-06-05 15:36:18,323 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 9379 transitions. Word has length 37 [2021-06-05 15:36:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:18,324 INFO L482 AbstractCegarLoop]: Abstraction has 3651 states and 9379 transitions. [2021-06-05 15:36:18,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:36:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 9379 transitions. [2021-06-05 15:36:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:18,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:18,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:18,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 15:36:18,551 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:18,551 INFO L82 PathProgramCache]: Analyzing trace with hash 49497584, now seen corresponding path program 19 times [2021-06-05 15:36:18,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:18,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432232874] [2021-06-05 15:36:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:18,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:18,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432232874] [2021-06-05 15:36:18,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432232874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:18,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083685187] [2021-06-05 15:36:18,751 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 [2021-06-05 15:36:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:36:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:19,153 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:19,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:19,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:19,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:19,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:19,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:19,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083685187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:19,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:19,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 15:36:19,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494473741] [2021-06-05 15:36:19,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:36:19,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:36:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:36:19,230 INFO L87 Difference]: Start difference. First operand 3651 states and 9379 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:21,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:21,891 INFO L93 Difference]: Finished difference Result 9814 states and 24985 transitions. [2021-06-05 15:36:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:36:21,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:36:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:21,903 INFO L225 Difference]: With dead ends: 9814 [2021-06-05 15:36:21,903 INFO L226 Difference]: Without dead ends: 9455 [2021-06-05 15:36:21,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 2486.4ms TimeCoverageRelationStatistics Valid=1922, Invalid=10068, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 15:36:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-06-05 15:36:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 3907. [2021-06-05 15:36:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 2.5629800307219663) internal successors, (10011), 3906 states have internal predecessors, (10011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 10011 transitions. [2021-06-05 15:36:21,973 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 10011 transitions. Word has length 37 [2021-06-05 15:36:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:21,973 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 10011 transitions. [2021-06-05 15:36:21,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 10011 transitions. [2021-06-05 15:36:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:21,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:21,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:22,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:22,193 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1285155348, now seen corresponding path program 20 times [2021-06-05 15:36:22,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:22,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564948481] [2021-06-05 15:36:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:22,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:22,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564948481] [2021-06-05 15:36:22,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564948481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:22,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600793780] [2021-06-05 15:36:22,372 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 [2021-06-05 15:36:22,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:36:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:36:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:22,750 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:22,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:22,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:22,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:22,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:22,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:22,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600793780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:22,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:22,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 15:36:22,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842567201] [2021-06-05 15:36:22,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:36:22,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:36:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:36:22,830 INFO L87 Difference]: Start difference. First operand 3907 states and 10011 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:36:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:25,807 INFO L93 Difference]: Finished difference Result 9734 states and 24667 transitions. [2021-06-05 15:36:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 15:36:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-06-05 15:36:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:25,817 INFO L225 Difference]: With dead ends: 9734 [2021-06-05 15:36:25,817 INFO L226 Difference]: Without dead ends: 9251 [2021-06-05 15:36:25,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 2632.6ms TimeCoverageRelationStatistics Valid=2117, Invalid=11455, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 15:36:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2021-06-05 15:36:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 4183. [2021-06-05 15:36:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.5516499282639886) internal successors, (10671), 4182 states have internal predecessors, (10671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 10671 transitions. [2021-06-05 15:36:25,886 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 10671 transitions. Word has length 37 [2021-06-05 15:36:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:25,886 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 10671 transitions. [2021-06-05 15:36:25,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-06-05 15:36:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 10671 transitions. [2021-06-05 15:36:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:25,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:25,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:26,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:36:26,095 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1568060888, now seen corresponding path program 21 times [2021-06-05 15:36:26,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:26,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773197985] [2021-06-05 15:36:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:36:26,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:26,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773197985] [2021-06-05 15:36:26,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773197985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:26,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706524751] [2021-06-05 15:36:26,260 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 [2021-06-05 15:36:26,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:36:26,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:36:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:26,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:26,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:26,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:26,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 15:36:26,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:26,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:26,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:26,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:10 [2021-06-05 15:36:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:26,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706524751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:26,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:26,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-06-05 15:36:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508357162] [2021-06-05 15:36:26,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:36:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:36:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:36:26,855 INFO L87 Difference]: Start difference. First operand 4183 states and 10671 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:30,029 INFO L93 Difference]: Finished difference Result 10750 states and 26972 transitions. [2021-06-05 15:36:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:36:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:36:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:30,039 INFO L225 Difference]: With dead ends: 10750 [2021-06-05 15:36:30,039 INFO L226 Difference]: Without dead ends: 9874 [2021-06-05 15:36:30,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2668.3ms TimeCoverageRelationStatistics Valid=1896, Invalid=9660, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 15:36:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-06-05 15:36:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 4281. [2021-06-05 15:36:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 2.549299065420561) internal successors, (10911), 4280 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 10911 transitions. [2021-06-05 15:36:30,138 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 10911 transitions. Word has length 37 [2021-06-05 15:36:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:30,138 INFO L482 AbstractCegarLoop]: Abstraction has 4281 states and 10911 transitions. [2021-06-05 15:36:30,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 10911 transitions. [2021-06-05 15:36:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:30,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:30,145 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:30,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:36:30,361 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -62441724, now seen corresponding path program 22 times [2021-06-05 15:36:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:30,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661133856] [2021-06-05 15:36:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:36:30,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:30,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661133856] [2021-06-05 15:36:30,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661133856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:30,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509550485] [2021-06-05 15:36:30,536 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:30,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:36:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:30,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:36:30,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:30,899 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:30,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:30,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:30,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:30,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:30,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:30,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509550485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:30,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:30,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 15:36:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538988397] [2021-06-05 15:36:30,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:36:30,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:36:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:36:30,967 INFO L87 Difference]: Start difference. First operand 4281 states and 10911 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:34,621 INFO L93 Difference]: Finished difference Result 13721 states and 34563 transitions. [2021-06-05 15:36:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 15:36:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:36:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:34,636 INFO L225 Difference]: With dead ends: 13721 [2021-06-05 15:36:34,636 INFO L226 Difference]: Without dead ends: 13099 [2021-06-05 15:36:34,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 3028.2ms TimeCoverageRelationStatistics Valid=2290, Invalid=13460, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 15:36:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13099 states. [2021-06-05 15:36:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13099 to 4423. [2021-06-05 15:36:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.545002261420172) internal successors, (11254), 4422 states have internal predecessors, (11254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11254 transitions. [2021-06-05 15:36:34,763 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11254 transitions. Word has length 37 [2021-06-05 15:36:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:34,763 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11254 transitions. [2021-06-05 15:36:34,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11254 transitions. [2021-06-05 15:36:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:36:34,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:34,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:34,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:34,991 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash 722217220, now seen corresponding path program 23 times [2021-06-05 15:36:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:34,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172236657] [2021-06-05 15:36:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:36:35,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172236657] [2021-06-05 15:36:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172236657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604246861] [2021-06-05 15:36:35,179 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:35,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:36:35,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:36:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:35,559 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:35,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:35,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:35,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:35,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:35,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:35,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604246861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:35,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:35,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 15:36:35,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427862011] [2021-06-05 15:36:35,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:36:35,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:36:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:36:35,628 INFO L87 Difference]: Start difference. First operand 4423 states and 11254 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:40,051 INFO L93 Difference]: Finished difference Result 14347 states and 36035 transitions. [2021-06-05 15:36:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 15:36:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:36:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:40,064 INFO L225 Difference]: With dead ends: 14347 [2021-06-05 15:36:40,064 INFO L226 Difference]: Without dead ends: 13341 [2021-06-05 15:36:40,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7884 ImplicationChecksByTransitivity, 3811.8ms TimeCoverageRelationStatistics Valid=3139, Invalid=17741, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 15:36:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-06-05 15:36:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 4643. [2021-06-05 15:36:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.5359758724687635) internal successors, (11772), 4642 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11772 transitions. [2021-06-05 15:36:40,162 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11772 transitions. Word has length 37 [2021-06-05 15:36:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:40,162 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11772 transitions. [2021-06-05 15:36:40,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11772 transitions. [2021-06-05 15:36:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:36:40,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:40,170 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:40,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:36:40,388 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2000668951, now seen corresponding path program 24 times [2021-06-05 15:36:40,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:40,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996797937] [2021-06-05 15:36:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:40,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996797937] [2021-06-05 15:36:40,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996797937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538457640] [2021-06-05 15:36:40,418 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:40,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:36:40,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:36:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:40,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538457640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:40,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:40,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:36:40,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798746085] [2021-06-05 15:36:40,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:36:40,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:36:40,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:36:40,514 INFO L87 Difference]: Start difference. First operand 4643 states and 11772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:40,539 INFO L93 Difference]: Finished difference Result 5403 states and 13571 transitions. [2021-06-05 15:36:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:36:40,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:36:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:40,544 INFO L225 Difference]: With dead ends: 5403 [2021-06-05 15:36:40,544 INFO L226 Difference]: Without dead ends: 5331 [2021-06-05 15:36:40,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:36:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2021-06-05 15:36:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 4801. [2021-06-05 15:36:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 2.536875) internal successors, (12177), 4800 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 12177 transitions. [2021-06-05 15:36:40,591 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 12177 transitions. Word has length 40 [2021-06-05 15:36:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:40,591 INFO L482 AbstractCegarLoop]: Abstraction has 4801 states and 12177 transitions. [2021-06-05 15:36:40,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 12177 transitions. [2021-06-05 15:36:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:36:40,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:40,596 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:40,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:40,797 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash 336026460, now seen corresponding path program 25 times [2021-06-05 15:36:40,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:40,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4925299] [2021-06-05 15:36:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:36:40,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:40,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4925299] [2021-06-05 15:36:40,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4925299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:40,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7379062] [2021-06-05 15:36:40,959 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:36:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:41,371 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:36:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:36:41,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:41,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:41,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:41,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:36:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7379062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:41,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:41,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2021-06-05 15:36:41,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710653522] [2021-06-05 15:36:41,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:36:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:36:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:36:41,448 INFO L87 Difference]: Start difference. First operand 4801 states and 12177 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:43,945 INFO L93 Difference]: Finished difference Result 10636 states and 26811 transitions. [2021-06-05 15:36:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:36:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:36:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:43,956 INFO L225 Difference]: With dead ends: 10636 [2021-06-05 15:36:43,956 INFO L226 Difference]: Without dead ends: 10514 [2021-06-05 15:36:43,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2154.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=8111, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 15:36:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-06-05 15:36:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 4901. [2021-06-05 15:36:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4901 states, 4900 states have (on average 2.5353061224489797) internal successors, (12423), 4900 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 12423 transitions. [2021-06-05 15:36:44,041 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 12423 transitions. Word has length 40 [2021-06-05 15:36:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:44,041 INFO L482 AbstractCegarLoop]: Abstraction has 4901 states and 12423 transitions. [2021-06-05 15:36:44,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 12423 transitions. [2021-06-05 15:36:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:36:44,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:44,047 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:44,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:36:44,248 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash -427758525, now seen corresponding path program 26 times [2021-06-05 15:36:44,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:44,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969635307] [2021-06-05 15:36:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:44,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969635307] [2021-06-05 15:36:44,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969635307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683000873] [2021-06-05 15:36:44,619 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:44,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:36:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:36:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:45,185 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:36:45,186 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 50 treesize of output 22 [2021-06-05 15:36:45,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:45,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:45,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:45,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:36:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:45,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683000873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:45,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:45,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:36:45,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207789224] [2021-06-05 15:36:45,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:36:45,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:36:45,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:36:45,260 INFO L87 Difference]: Start difference. First operand 4901 states and 12423 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:36:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:51,194 INFO L93 Difference]: Finished difference Result 12060 states and 30372 transitions. [2021-06-05 15:36:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 15:36:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:36:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:51,206 INFO L225 Difference]: With dead ends: 12060 [2021-06-05 15:36:51,206 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 15:36:51,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 4790.9ms TimeCoverageRelationStatistics Valid=3516, Invalid=21924, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 15:36:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 15:36:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 5132. [2021-06-05 15:36:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 2.540050672383551) internal successors, (13033), 5131 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 13033 transitions. [2021-06-05 15:36:51,288 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 13033 transitions. Word has length 43 [2021-06-05 15:36:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:51,288 INFO L482 AbstractCegarLoop]: Abstraction has 5132 states and 13033 transitions. [2021-06-05 15:36:51,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:36:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 13033 transitions. [2021-06-05 15:36:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:36:51,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:51,294 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:51,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:51,496 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash 110708185, now seen corresponding path program 27 times [2021-06-05 15:36:51,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:51,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796474821] [2021-06-05 15:36:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:51,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:51,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796474821] [2021-06-05 15:36:51,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796474821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:51,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783604424] [2021-06-05 15:36:51,792 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:36:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:36:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:52,457 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:36:52,457 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 50 treesize of output 22 [2021-06-05 15:36:52,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:52,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:52,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:36:52,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:36:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:52,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783604424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:52,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:52,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:36:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670926160] [2021-06-05 15:36:52,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:36:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:36:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:36:52,532 INFO L87 Difference]: Start difference. First operand 5132 states and 13033 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:01,786 INFO L93 Difference]: Finished difference Result 14776 states and 37218 transitions. [2021-06-05 15:37:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-05 15:37:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:37:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:01,798 INFO L225 Difference]: With dead ends: 14776 [2021-06-05 15:37:01,798 INFO L226 Difference]: Without dead ends: 13670 [2021-06-05 15:37:01,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15990 ImplicationChecksByTransitivity, 7693.9ms TimeCoverageRelationStatistics Valid=6081, Invalid=37391, Unknown=0, NotChecked=0, Total=43472 [2021-06-05 15:37:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13670 states. [2021-06-05 15:37:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13670 to 5194. [2021-06-05 15:37:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 2.5407279029462737) internal successors, (13194), 5193 states have internal predecessors, (13194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 13194 transitions. [2021-06-05 15:37:01,880 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 13194 transitions. Word has length 43 [2021-06-05 15:37:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:01,880 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 13194 transitions. [2021-06-05 15:37:01,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 13194 transitions. [2021-06-05 15:37:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:37:01,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:01,886 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:02,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 15:37:02,095 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash -880659713, now seen corresponding path program 28 times [2021-06-05 15:37:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:02,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068663529] [2021-06-05 15:37:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:02,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068663529] [2021-06-05 15:37:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068663529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024913280] [2021-06-05 15:37:02,389 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:02,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:37:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:37:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:03,007 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:37:03,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 15:37:03,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:03,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:03,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:37:03,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:37:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:03,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024913280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:03,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:03,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:37:03,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447857050] [2021-06-05 15:37:03,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:37:03,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:03,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:37:03,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:37:03,099 INFO L87 Difference]: Start difference. First operand 5194 states and 13194 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:11,574 INFO L93 Difference]: Finished difference Result 14820 states and 37465 transitions. [2021-06-05 15:37:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-06-05 15:37:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:37:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:11,588 INFO L225 Difference]: With dead ends: 14820 [2021-06-05 15:37:11,589 INFO L226 Difference]: Without dead ends: 13932 [2021-06-05 15:37:11,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11848 ImplicationChecksByTransitivity, 6849.8ms TimeCoverageRelationStatistics Valid=4485, Invalid=30297, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 15:37:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13932 states. [2021-06-05 15:37:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13932 to 5454. [2021-06-05 15:37:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5464881716486336) internal successors, (13886), 5453 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13886 transitions. [2021-06-05 15:37:11,743 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13886 transitions. Word has length 43 [2021-06-05 15:37:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:11,743 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13886 transitions. [2021-06-05 15:37:11,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13886 transitions. [2021-06-05 15:37:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:37:11,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:11,748 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:11,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:11,953 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -764697707, now seen corresponding path program 29 times [2021-06-05 15:37:11,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:11,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742535127] [2021-06-05 15:37:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:12,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:12,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742535127] [2021-06-05 15:37:12,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742535127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248140100] [2021-06-05 15:37:12,351 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:12,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:37:12,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:12,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:37:12,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:37:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:37:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:37:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 15:37:13,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:13,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:13,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:37:13,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:10 [2021-06-05 15:37:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:13,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248140100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:13,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:13,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:37:13,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510457829] [2021-06-05 15:37:13,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:37:13,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:37:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:37:13,607 INFO L87 Difference]: Start difference. First operand 5454 states and 13886 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:24,757 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 15:37:25,805 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 15:37:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:40,627 INFO L93 Difference]: Finished difference Result 15621 states and 39738 transitions. [2021-06-05 15:37:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 15:37:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:37:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:40,644 INFO L225 Difference]: With dead ends: 15621 [2021-06-05 15:37:40,644 INFO L226 Difference]: Without dead ends: 14882 [2021-06-05 15:37:40,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12068 ImplicationChecksByTransitivity, 12284.4ms TimeCoverageRelationStatistics Valid=4072, Invalid=29967, Unknown=1, NotChecked=0, Total=34040 [2021-06-05 15:37:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2021-06-05 15:37:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 6016. [2021-06-05 15:37:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.5620947630922695) internal successors, (15411), 6015 states have internal predecessors, (15411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 15411 transitions. [2021-06-05 15:37:40,763 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 15411 transitions. Word has length 43 [2021-06-05 15:37:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:40,763 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 15411 transitions. [2021-06-05 15:37:40,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 15411 transitions. [2021-06-05 15:37:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:37:40,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:40,771 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:40,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:40,971 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1773642173, now seen corresponding path program 30 times [2021-06-05 15:37:40,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:40,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287115702] [2021-06-05 15:37:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:41,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:41,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287115702] [2021-06-05 15:37:41,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287115702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:41,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930474925] [2021-06-05 15:37:41,322 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:41,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:37:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:37:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:41,890 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:37:41,890 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 50 treesize of output 22 [2021-06-05 15:37:41,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:41,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:41,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:37:41,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:37:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:41,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930474925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:41,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:41,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:37:41,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648665788] [2021-06-05 15:37:41,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:37:41,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:41,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:37:41,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:37:41,963 INFO L87 Difference]: Start difference. First operand 6016 states and 15411 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:53,189 INFO L93 Difference]: Finished difference Result 20637 states and 52374 transitions. [2021-06-05 15:37:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-06-05 15:37:53,189 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:37:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:53,208 INFO L225 Difference]: With dead ends: 20637 [2021-06-05 15:37:53,209 INFO L226 Difference]: Without dead ends: 18278 [2021-06-05 15:37:53,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24578 ImplicationChecksByTransitivity, 9455.8ms TimeCoverageRelationStatistics Valid=8601, Invalid=52161, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 15:37:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18278 states. [2021-06-05 15:37:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18278 to 6142. [2021-06-05 15:37:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 2.563100472235792) internal successors, (15740), 6141 states have internal predecessors, (15740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 15740 transitions. [2021-06-05 15:37:53,397 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 15740 transitions. Word has length 43 [2021-06-05 15:37:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:53,397 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 15740 transitions. [2021-06-05 15:37:53,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:37:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 15740 transitions. [2021-06-05 15:37:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:37:53,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:53,403 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:53,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:53,604 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash 875403101, now seen corresponding path program 31 times [2021-06-05 15:37:53,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:53,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607977195] [2021-06-05 15:37:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:53,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:53,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607977195] [2021-06-05 15:37:53,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607977195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:53,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463064626] [2021-06-05 15:37:53,913 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:37:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:54,489 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:37:54,490 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 50 treesize of output 22 [2021-06-05 15:37:54,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:54,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:54,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:37:54,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:37:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:54,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463064626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:54,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:54,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:37:54,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273607919] [2021-06-05 15:37:54,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:37:54,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:37:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:37:54,568 INFO L87 Difference]: Start difference. First operand 6142 states and 15740 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:38:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:04,851 INFO L93 Difference]: Finished difference Result 17902 states and 45508 transitions. [2021-06-05 15:38:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-06-05 15:38:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:38:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:04,868 INFO L225 Difference]: With dead ends: 17902 [2021-06-05 15:38:04,868 INFO L226 Difference]: Without dead ends: 16706 [2021-06-05 15:38:04,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20501 ImplicationChecksByTransitivity, 8450.9ms TimeCoverageRelationStatistics Valid=7171, Invalid=45499, Unknown=0, NotChecked=0, Total=52670 [2021-06-05 15:38:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16706 states. [2021-06-05 15:38:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16706 to 6404. [2021-06-05 15:38:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 6403 states have (on average 2.567702639387787) internal successors, (16441), 6403 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 16441 transitions. [2021-06-05 15:38:04,983 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 16441 transitions. Word has length 43 [2021-06-05 15:38:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:04,983 INFO L482 AbstractCegarLoop]: Abstraction has 6404 states and 16441 transitions. [2021-06-05 15:38:04,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:38:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 16441 transitions. [2021-06-05 15:38:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:38:04,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:04,990 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:05,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:38:05,190 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:05,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1672349977, now seen corresponding path program 32 times [2021-06-05 15:38:05,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:05,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189021935] [2021-06-05 15:38:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:05,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:05,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189021935] [2021-06-05 15:38:05,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189021935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:05,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907572505] [2021-06-05 15:38:05,498 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:05,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:38:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:38:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:06,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 15:38:06,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:06,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:06,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:06,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 15:38:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:06,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907572505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:06,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:06,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:38:06,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610965709] [2021-06-05 15:38:06,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:38:06,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:06,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:38:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:38:06,408 INFO L87 Difference]: Start difference. First operand 6404 states and 16441 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:38:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:15,743 INFO L93 Difference]: Finished difference Result 20466 states and 52270 transitions. [2021-06-05 15:38:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-05 15:38:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:38:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:15,763 INFO L225 Difference]: With dead ends: 20466 [2021-06-05 15:38:15,763 INFO L226 Difference]: Without dead ends: 18559 [2021-06-05 15:38:15,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 7442.7ms TimeCoverageRelationStatistics Valid=6025, Invalid=39131, Unknown=0, NotChecked=0, Total=45156 [2021-06-05 15:38:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18559 states. [2021-06-05 15:38:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18559 to 7142. [2021-06-05 15:38:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 2.563786584511973) internal successors, (18308), 7141 states have internal predecessors, (18308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 18308 transitions. [2021-06-05 15:38:15,901 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 18308 transitions. Word has length 43 [2021-06-05 15:38:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:15,901 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 18308 transitions. [2021-06-05 15:38:15,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:38:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 18308 transitions. [2021-06-05 15:38:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:38:15,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:15,908 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:16,108 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1747211427, now seen corresponding path program 33 times [2021-06-05 15:38:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:16,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183890741] [2021-06-05 15:38:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:16,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183890741] [2021-06-05 15:38:16,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183890741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201891515] [2021-06-05 15:38:16,416 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:16,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:38:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:17,001 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:38:17,001 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 50 treesize of output 22 [2021-06-05 15:38:17,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:17,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:17,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:17,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:38:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:17,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201891515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:17,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:17,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:38:17,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413439007] [2021-06-05 15:38:17,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:38:17,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:38:17,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:38:17,108 INFO L87 Difference]: Start difference. First operand 7142 states and 18308 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:38:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:24,175 INFO L93 Difference]: Finished difference Result 17841 states and 45530 transitions. [2021-06-05 15:38:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-05 15:38:24,175 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:38:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:24,196 INFO L225 Difference]: With dead ends: 17841 [2021-06-05 15:38:24,196 INFO L226 Difference]: Without dead ends: 17342 [2021-06-05 15:38:24,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13007 ImplicationChecksByTransitivity, 5693.4ms TimeCoverageRelationStatistics Valid=4015, Invalid=30767, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 15:38:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17342 states. [2021-06-05 15:38:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17342 to 8284. [2021-06-05 15:38:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 2.5694796571290595) internal successors, (21283), 8283 states have internal predecessors, (21283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 21283 transitions. [2021-06-05 15:38:24,346 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 21283 transitions. Word has length 43 [2021-06-05 15:38:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:24,346 INFO L482 AbstractCegarLoop]: Abstraction has 8284 states and 21283 transitions. [2021-06-05 15:38:24,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:38:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 21283 transitions. [2021-06-05 15:38:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:38:24,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:24,354 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:24,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:24,569 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1084673731, now seen corresponding path program 34 times [2021-06-05 15:38:24,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:24,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165588201] [2021-06-05 15:38:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:38:24,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165588201] [2021-06-05 15:38:24,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165588201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165184800] [2021-06-05 15:38:24,835 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:24,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:38:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:25,424 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:38:25,425 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 50 treesize of output 22 [2021-06-05 15:38:25,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:25,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:25,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:25,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:38:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:25,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165184800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:25,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:25,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:38:25,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832121821] [2021-06-05 15:38:25,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:25,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:25,495 INFO L87 Difference]: Start difference. First operand 8284 states and 21283 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:38:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:35,150 INFO L93 Difference]: Finished difference Result 20442 states and 52162 transitions. [2021-06-05 15:38:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-06-05 15:38:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:38:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:35,171 INFO L225 Difference]: With dead ends: 20442 [2021-06-05 15:38:35,171 INFO L226 Difference]: Without dead ends: 19406 [2021-06-05 15:38:35,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18575 ImplicationChecksByTransitivity, 7595.7ms TimeCoverageRelationStatistics Valid=6094, Invalid=41212, Unknown=0, NotChecked=0, Total=47306 [2021-06-05 15:38:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2021-06-05 15:38:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 8918. [2021-06-05 15:38:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 2.5737355612874286) internal successors, (22950), 8917 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 22950 transitions. [2021-06-05 15:38:35,405 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 22950 transitions. Word has length 43 [2021-06-05 15:38:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:35,405 INFO L482 AbstractCegarLoop]: Abstraction has 8918 states and 22950 transitions. [2021-06-05 15:38:35,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:38:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 22950 transitions. [2021-06-05 15:38:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:38:35,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:35,416 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 15:38:35,629 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1869332675, now seen corresponding path program 35 times [2021-06-05 15:38:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956861254] [2021-06-05 15:38:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:35,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:35,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956861254] [2021-06-05 15:38:35,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956861254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:35,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489624303] [2021-06-05 15:38:35,890 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:35,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:38:35,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:35,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:38:36,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 15:38:36,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:36,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:36,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:36,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-06-05 15:38:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:36,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489624303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:36,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:36,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:38:36,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748025538] [2021-06-05 15:38:36,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:36,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:36,559 INFO L87 Difference]: Start difference. First operand 8918 states and 22950 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:38:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:45,604 INFO L93 Difference]: Finished difference Result 23587 states and 60165 transitions. [2021-06-05 15:38:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-06-05 15:38:45,604 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:38:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:45,627 INFO L225 Difference]: With dead ends: 23587 [2021-06-05 15:38:45,627 INFO L226 Difference]: Without dead ends: 21831 [2021-06-05 15:38:45,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19157 ImplicationChecksByTransitivity, 7124.7ms TimeCoverageRelationStatistics Valid=5543, Invalid=41763, Unknown=0, NotChecked=0, Total=47306 [2021-06-05 15:38:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21831 states. [2021-06-05 15:38:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21831 to 10760. [2021-06-05 15:38:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 2.589924714192769) internal successors, (27865), 10759 states have internal predecessors, (27865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 27865 transitions. [2021-06-05 15:38:45,820 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 27865 transitions. Word has length 43 [2021-06-05 15:38:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:45,820 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 27865 transitions. [2021-06-05 15:38:45,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:38:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 27865 transitions. [2021-06-05 15:38:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:38:45,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:45,830 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:46,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:46,031 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:46,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1988274585, now seen corresponding path program 36 times [2021-06-05 15:38:46,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:46,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326557723] [2021-06-05 15:38:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:38:46,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:46,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326557723] [2021-06-05 15:38:46,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326557723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:46,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388767452] [2021-06-05 15:38:46,333 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:46,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:38:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:46,966 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:38:46,967 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 50 treesize of output 22 [2021-06-05 15:38:46,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:46,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:46,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:46,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:38:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:47,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388767452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:47,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:47,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:38:47,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566067115] [2021-06-05 15:38:47,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:38:47,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:47,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:38:47,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:38:47,041 INFO L87 Difference]: Start difference. First operand 10760 states and 27865 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:38:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:54,217 INFO L93 Difference]: Finished difference Result 22434 states and 57580 transitions. [2021-06-05 15:38:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-06-05 15:38:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 43 [2021-06-05 15:38:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:54,245 INFO L225 Difference]: With dead ends: 22434 [2021-06-05 15:38:54,245 INFO L226 Difference]: Without dead ends: 21334 [2021-06-05 15:38:54,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13996 ImplicationChecksByTransitivity, 5751.2ms TimeCoverageRelationStatistics Valid=3941, Invalid=31591, Unknown=0, NotChecked=0, Total=35532 [2021-06-05 15:38:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21334 states. [2021-06-05 15:38:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21334 to 12742. [2021-06-05 15:38:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12742 states, 12741 states have (on average 2.596028569186092) internal successors, (33076), 12741 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12742 states to 12742 states and 33076 transitions. [2021-06-05 15:38:54,492 INFO L78 Accepts]: Start accepts. Automaton has 12742 states and 33076 transitions. Word has length 43 [2021-06-05 15:38:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:54,492 INFO L482 AbstractCegarLoop]: Abstraction has 12742 states and 33076 transitions. [2021-06-05 15:38:54,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:38:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12742 states and 33076 transitions. [2021-06-05 15:38:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:38:54,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:54,505 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:54,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:38:54,709 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1217725385, now seen corresponding path program 37 times [2021-06-05 15:38:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:54,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30363339] [2021-06-05 15:38:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:55,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:55,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30363339] [2021-06-05 15:38:55,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30363339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:55,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713811137] [2021-06-05 15:38:55,022 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:55,595 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:38:55,595 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 50 treesize of output 22 [2021-06-05 15:38:55,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:55,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:55,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:55,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:38:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:55,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713811137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:55,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:55,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:38:55,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996119179] [2021-06-05 15:38:55,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:38:55,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:55,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:38:55,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:38:55,670 INFO L87 Difference]: Start difference. First operand 12742 states and 33076 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:39:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:03,609 INFO L93 Difference]: Finished difference Result 32165 states and 83382 transitions. [2021-06-05 15:39:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-06-05 15:39:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:39:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:03,651 INFO L225 Difference]: With dead ends: 32165 [2021-06-05 15:39:03,651 INFO L226 Difference]: Without dead ends: 31312 [2021-06-05 15:39:03,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13281 ImplicationChecksByTransitivity, 6293.8ms TimeCoverageRelationStatistics Valid=4644, Invalid=31266, Unknown=0, NotChecked=0, Total=35910 [2021-06-05 15:39:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2021-06-05 15:39:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 13654. [2021-06-05 15:39:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13654 states, 13653 states have (on average 2.5966454259137186) internal successors, (35452), 13653 states have internal predecessors, (35452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13654 states to 13654 states and 35452 transitions. [2021-06-05 15:39:03,961 INFO L78 Accepts]: Start accepts. Automaton has 13654 states and 35452 transitions. Word has length 43 [2021-06-05 15:39:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:03,961 INFO L482 AbstractCegarLoop]: Abstraction has 13654 states and 35452 transitions. [2021-06-05 15:39:03,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:39:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 13654 states and 35452 transitions. [2021-06-05 15:39:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:03,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:03,975 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:04,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 15:39:04,175 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1101763379, now seen corresponding path program 38 times [2021-06-05 15:39:04,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:04,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047010118] [2021-06-05 15:39:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:04,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047010118] [2021-06-05 15:39:04,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047010118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614192727] [2021-06-05 15:39:04,527 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:04,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:39:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:04,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:05,084 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:39:05,084 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 50 treesize of output 22 [2021-06-05 15:39:05,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:05,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:05,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:05,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:39:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:05,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614192727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:05,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:05,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:39:05,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473491002] [2021-06-05 15:39:05,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:39:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:39:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:39:05,159 INFO L87 Difference]: Start difference. First operand 13654 states and 35452 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:39:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:11,803 INFO L93 Difference]: Finished difference Result 31006 states and 80485 transitions. [2021-06-05 15:39:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-05 15:39:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:39:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:11,842 INFO L225 Difference]: With dead ends: 31006 [2021-06-05 15:39:11,842 INFO L226 Difference]: Without dead ends: 30540 [2021-06-05 15:39:11,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11497 ImplicationChecksByTransitivity, 5286.5ms TimeCoverageRelationStatistics Valid=3867, Invalid=26583, Unknown=0, NotChecked=0, Total=30450 [2021-06-05 15:39:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30540 states. [2021-06-05 15:39:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30540 to 13812. [2021-06-05 15:39:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 13811 states have (on average 2.600825429005865) internal successors, (35920), 13811 states have internal predecessors, (35920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 35920 transitions. [2021-06-05 15:39:12,126 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 35920 transitions. Word has length 43 [2021-06-05 15:39:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:12,126 INFO L482 AbstractCegarLoop]: Abstraction has 13812 states and 35920 transitions. [2021-06-05 15:39:12,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:39:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 35920 transitions. [2021-06-05 15:39:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:12,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:12,140 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:12,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:12,341 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -979642131, now seen corresponding path program 39 times [2021-06-05 15:39:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:12,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802074835] [2021-06-05 15:39:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:12,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:12,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802074835] [2021-06-05 15:39:12,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802074835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:12,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418162956] [2021-06-05 15:39:12,676 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:12,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:39:12,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:12,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:13,278 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:39:13,279 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 50 treesize of output 22 [2021-06-05 15:39:13,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:13,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:13,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:13,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:39:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:13,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418162956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:13,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:13,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:39:13,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913807856] [2021-06-05 15:39:13,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:39:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:39:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:39:13,348 INFO L87 Difference]: Start difference. First operand 13812 states and 35920 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:39:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:21,512 INFO L93 Difference]: Finished difference Result 36511 states and 95055 transitions. [2021-06-05 15:39:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-06-05 15:39:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:39:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:21,559 INFO L225 Difference]: With dead ends: 36511 [2021-06-05 15:39:21,559 INFO L226 Difference]: Without dead ends: 34823 [2021-06-05 15:39:21,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15877 ImplicationChecksByTransitivity, 6262.2ms TimeCoverageRelationStatistics Valid=5024, Invalid=34776, Unknown=0, NotChecked=0, Total=39800 [2021-06-05 15:39:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34823 states. [2021-06-05 15:39:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34823 to 15038. [2021-06-05 15:39:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15038 states, 15037 states have (on average 2.606969475294274) internal successors, (39201), 15037 states have internal predecessors, (39201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15038 states to 15038 states and 39201 transitions. [2021-06-05 15:39:21,924 INFO L78 Accepts]: Start accepts. Automaton has 15038 states and 39201 transitions. Word has length 43 [2021-06-05 15:39:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:21,924 INFO L482 AbstractCegarLoop]: Abstraction has 15038 states and 39201 transitions. [2021-06-05 15:39:21,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:39:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15038 states and 39201 transitions. [2021-06-05 15:39:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:21,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:21,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:22,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 15:39:22,139 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash -542282095, now seen corresponding path program 40 times [2021-06-05 15:39:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:22,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12901558] [2021-06-05 15:39:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:39:22,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:22,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12901558] [2021-06-05 15:39:22,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12901558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:22,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051799764] [2021-06-05 15:39:22,412 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:22,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:39:22,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:23,064 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:39:23,064 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 50 treesize of output 22 [2021-06-05 15:39:23,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:23,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:23,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:23,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:39:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:23,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051799764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:23,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:23,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:39:23,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883186651] [2021-06-05 15:39:23,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:39:23,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:23,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:39:23,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:39:23,138 INFO L87 Difference]: Start difference. First operand 15038 states and 39201 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:39:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:29,735 INFO L93 Difference]: Finished difference Result 33624 states and 87489 transitions. [2021-06-05 15:39:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 15:39:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 43 [2021-06-05 15:39:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:29,779 INFO L225 Difference]: With dead ends: 33624 [2021-06-05 15:39:29,779 INFO L226 Difference]: Without dead ends: 32372 [2021-06-05 15:39:29,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11409 ImplicationChecksByTransitivity, 5195.6ms TimeCoverageRelationStatistics Valid=3608, Invalid=25804, Unknown=0, NotChecked=0, Total=29412 [2021-06-05 15:39:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32372 states. [2021-06-05 15:39:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32372 to 14940. [2021-06-05 15:39:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14940 states, 14939 states have (on average 2.6187830510743693) internal successors, (39122), 14939 states have internal predecessors, (39122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14940 states to 14940 states and 39122 transitions. [2021-06-05 15:39:30,090 INFO L78 Accepts]: Start accepts. Automaton has 14940 states and 39122 transitions. Word has length 43 [2021-06-05 15:39:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:30,090 INFO L482 AbstractCegarLoop]: Abstraction has 14940 states and 39122 transitions. [2021-06-05 15:39:30,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:39:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 14940 states and 39122 transitions. [2021-06-05 15:39:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:30,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:30,106 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:30,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:39:30,307 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1709625473, now seen corresponding path program 41 times [2021-06-05 15:39:30,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:30,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298792213] [2021-06-05 15:39:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:30,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:30,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298792213] [2021-06-05 15:39:30,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298792213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:30,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901286304] [2021-06-05 15:39:30,580 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:30,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:39:30,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:31,153 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:39:31,153 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 50 treesize of output 22 [2021-06-05 15:39:31,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:31,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:31,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:31,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:39:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:31,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901286304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:31,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:31,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:39:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760378184] [2021-06-05 15:39:31,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:39:31,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:39:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:39:31,233 INFO L87 Difference]: Start difference. First operand 14940 states and 39122 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:39:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:39,440 INFO L93 Difference]: Finished difference Result 36476 states and 95769 transitions. [2021-06-05 15:39:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-06-05 15:39:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:39:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:39,490 INFO L225 Difference]: With dead ends: 36476 [2021-06-05 15:39:39,491 INFO L226 Difference]: Without dead ends: 34935 [2021-06-05 15:39:39,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14698 ImplicationChecksByTransitivity, 6153.9ms TimeCoverageRelationStatistics Valid=4399, Invalid=33043, Unknown=0, NotChecked=0, Total=37442 [2021-06-05 15:39:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34935 states. [2021-06-05 15:39:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34935 to 16690. [2021-06-05 15:39:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16690 states, 16689 states have (on average 2.6272994187788363) internal successors, (43847), 16689 states have internal predecessors, (43847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16690 states to 16690 states and 43847 transitions. [2021-06-05 15:39:39,885 INFO L78 Accepts]: Start accepts. Automaton has 16690 states and 43847 transitions. Word has length 43 [2021-06-05 15:39:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:39,885 INFO L482 AbstractCegarLoop]: Abstraction has 16690 states and 43847 transitions. [2021-06-05 15:39:39,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:39:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 16690 states and 43847 transitions. [2021-06-05 15:39:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:39,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:39,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:40,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:39:40,104 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash -509263027, now seen corresponding path program 42 times [2021-06-05 15:39:40,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:40,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548321113] [2021-06-05 15:39:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:39:40,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:40,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548321113] [2021-06-05 15:39:40,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548321113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:40,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184912769] [2021-06-05 15:39:40,362 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:40,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:39:40,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:40,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:40,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:40,911 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:39:40,912 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 50 treesize of output 22 [2021-06-05 15:39:40,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:40,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:40,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:40,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:39:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:40,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184912769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:40,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:40,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:39:40,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306682800] [2021-06-05 15:39:40,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:39:40,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:39:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:39:40,978 INFO L87 Difference]: Start difference. First operand 16690 states and 43847 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:39:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:47,344 INFO L93 Difference]: Finished difference Result 30990 states and 80539 transitions. [2021-06-05 15:39:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 15:39:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 43 [2021-06-05 15:39:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:47,378 INFO L225 Difference]: With dead ends: 30990 [2021-06-05 15:39:47,378 INFO L226 Difference]: Without dead ends: 29948 [2021-06-05 15:39:47,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10628 ImplicationChecksByTransitivity, 4830.5ms TimeCoverageRelationStatistics Valid=3180, Invalid=24542, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 15:39:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29948 states. [2021-06-05 15:39:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29948 to 17300. [2021-06-05 15:39:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17300 states, 17299 states have (on average 2.6337360541071737) internal successors, (45561), 17299 states have internal predecessors, (45561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17300 states to 17300 states and 45561 transitions. [2021-06-05 15:39:47,668 INFO L78 Accepts]: Start accepts. Automaton has 17300 states and 45561 transitions. Word has length 43 [2021-06-05 15:39:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:47,668 INFO L482 AbstractCegarLoop]: Abstraction has 17300 states and 45561 transitions. [2021-06-05 15:39:47,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:39:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17300 states and 45561 transitions. [2021-06-05 15:39:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:47,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:47,687 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:47,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:47,889 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2104375741, now seen corresponding path program 43 times [2021-06-05 15:39:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:47,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232327532] [2021-06-05 15:39:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:48,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:48,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232327532] [2021-06-05 15:39:48,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232327532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:48,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517594642] [2021-06-05 15:39:48,249 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:48,830 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:39:48,830 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 50 treesize of output 22 [2021-06-05 15:39:48,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:48,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:48,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:48,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:39:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:48,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517594642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:48,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:48,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:39:48,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765023326] [2021-06-05 15:39:48,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:39:48,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:48,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:39:48,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:39:48,918 INFO L87 Difference]: Start difference. First operand 17300 states and 45561 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:39:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:53,988 INFO L93 Difference]: Finished difference Result 37293 states and 97067 transitions. [2021-06-05 15:39:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 15:39:53,988 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:39:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:54,109 INFO L225 Difference]: With dead ends: 37293 [2021-06-05 15:39:54,109 INFO L226 Difference]: Without dead ends: 36869 [2021-06-05 15:39:54,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8047 ImplicationChecksByTransitivity, 4519.3ms TimeCoverageRelationStatistics Valid=3368, Invalid=20194, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 15:39:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36869 states. [2021-06-05 15:39:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36869 to 18932. [2021-06-05 15:39:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18932 states, 18931 states have (on average 2.627700596904548) internal successors, (49745), 18931 states have internal predecessors, (49745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18932 states to 18932 states and 49745 transitions. [2021-06-05 15:39:54,414 INFO L78 Accepts]: Start accepts. Automaton has 18932 states and 49745 transitions. Word has length 43 [2021-06-05 15:39:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:54,414 INFO L482 AbstractCegarLoop]: Abstraction has 18932 states and 49745 transitions. [2021-06-05 15:39:54,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:39:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18932 states and 49745 transitions. [2021-06-05 15:39:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:39:54,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:54,434 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:54,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 15:39:54,634 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash 544669533, now seen corresponding path program 44 times [2021-06-05 15:39:54,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:54,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407169006] [2021-06-05 15:39:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:54,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407169006] [2021-06-05 15:39:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407169006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588417880] [2021-06-05 15:39:54,910 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:54,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:39:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:39:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:39:55,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:55,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 15:39:55,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:55,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:55,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:39:55,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 15:39:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588417880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:55,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:55,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:39:55,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570897658] [2021-06-05 15:39:55,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:39:55,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:39:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:39:55,692 INFO L87 Difference]: Start difference. First operand 18932 states and 49745 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:40:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:02,712 INFO L93 Difference]: Finished difference Result 39448 states and 103216 transitions. [2021-06-05 15:40:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 15:40:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:40:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:02,765 INFO L225 Difference]: With dead ends: 39448 [2021-06-05 15:40:02,765 INFO L226 Difference]: Without dead ends: 38630 [2021-06-05 15:40:02,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10922 ImplicationChecksByTransitivity, 5967.2ms TimeCoverageRelationStatistics Valid=4697, Invalid=25753, Unknown=0, NotChecked=0, Total=30450 [2021-06-05 15:40:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38630 states. [2021-06-05 15:40:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38630 to 19230. [2021-06-05 15:40:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19230 states, 19229 states have (on average 2.623953403713142) internal successors, (50456), 19229 states have internal predecessors, (50456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19230 states to 19230 states and 50456 transitions. [2021-06-05 15:40:03,178 INFO L78 Accepts]: Start accepts. Automaton has 19230 states and 50456 transitions. Word has length 43 [2021-06-05 15:40:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:03,178 INFO L482 AbstractCegarLoop]: Abstraction has 19230 states and 50456 transitions. [2021-06-05 15:40:03,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:40:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 19230 states and 50456 transitions. [2021-06-05 15:40:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:03,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:03,199 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:03,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:40:03,400 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -268346073, now seen corresponding path program 45 times [2021-06-05 15:40:03,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:03,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391484947] [2021-06-05 15:40:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:40:03,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391484947] [2021-06-05 15:40:03,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391484947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629491616] [2021-06-05 15:40:03,692 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:03,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:40:03,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:03,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:40:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:04,357 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:40:04,357 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 50 treesize of output 22 [2021-06-05 15:40:04,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:04,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:04,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:04,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:40:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:04,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629491616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:04,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:04,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:40:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480699785] [2021-06-05 15:40:04,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:40:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:40:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:40:04,426 INFO L87 Difference]: Start difference. First operand 19230 states and 50456 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:40:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:10,443 INFO L93 Difference]: Finished difference Result 39931 states and 104656 transitions. [2021-06-05 15:40:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 15:40:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 43 [2021-06-05 15:40:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:10,496 INFO L225 Difference]: With dead ends: 39931 [2021-06-05 15:40:10,496 INFO L226 Difference]: Without dead ends: 38867 [2021-06-05 15:40:10,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11020 ImplicationChecksByTransitivity, 4991.4ms TimeCoverageRelationStatistics Valid=3483, Invalid=24573, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 15:40:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38867 states. [2021-06-05 15:40:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38867 to 21046. [2021-06-05 15:40:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21046 states, 21045 states have (on average 2.633071988595866) internal successors, (55413), 21045 states have internal predecessors, (55413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21046 states to 21046 states and 55413 transitions. [2021-06-05 15:40:10,916 INFO L78 Accepts]: Start accepts. Automaton has 21046 states and 55413 transitions. Word has length 43 [2021-06-05 15:40:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:10,916 INFO L482 AbstractCegarLoop]: Abstraction has 21046 states and 55413 transitions. [2021-06-05 15:40:10,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:40:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21046 states and 55413 transitions. [2021-06-05 15:40:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:10,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:10,938 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:11,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:40:11,139 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash 494656337, now seen corresponding path program 46 times [2021-06-05 15:40:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:11,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733331830] [2021-06-05 15:40:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:40:11,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733331830] [2021-06-05 15:40:11,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733331830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987610248] [2021-06-05 15:40:11,382 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:11,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:40:11,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:40:11,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:12,002 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:40:12,002 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 50 treesize of output 22 [2021-06-05 15:40:12,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:12,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:12,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:12,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:40:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:12,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987610248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:12,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:12,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:40:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437998023] [2021-06-05 15:40:12,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:40:12,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:40:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:40:12,068 INFO L87 Difference]: Start difference. First operand 21046 states and 55413 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:40:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:18,564 INFO L93 Difference]: Finished difference Result 40519 states and 105709 transitions. [2021-06-05 15:40:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-05 15:40:18,564 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 43 [2021-06-05 15:40:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:18,617 INFO L225 Difference]: With dead ends: 40519 [2021-06-05 15:40:18,618 INFO L226 Difference]: Without dead ends: 39385 [2021-06-05 15:40:18,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11957 ImplicationChecksByTransitivity, 5081.7ms TimeCoverageRelationStatistics Valid=3626, Invalid=26476, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 15:40:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39385 states. [2021-06-05 15:40:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39385 to 21992. [2021-06-05 15:40:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21992 states, 21991 states have (on average 2.637442590150516) internal successors, (58000), 21991 states have internal predecessors, (58000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21992 states to 21992 states and 58000 transitions. [2021-06-05 15:40:19,045 INFO L78 Accepts]: Start accepts. Automaton has 21992 states and 58000 transitions. Word has length 43 [2021-06-05 15:40:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:19,046 INFO L482 AbstractCegarLoop]: Abstraction has 21992 states and 58000 transitions. [2021-06-05 15:40:19,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:40:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 21992 states and 58000 transitions. [2021-06-05 15:40:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:19,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:19,070 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:19,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 15:40:19,271 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1349265309, now seen corresponding path program 47 times [2021-06-05 15:40:19,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:19,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265785657] [2021-06-05 15:40:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:19,512 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-06-05 15:40:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:19,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265785657] [2021-06-05 15:40:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265785657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352843672] [2021-06-05 15:40:19,627 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:19,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:40:19,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:40:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:20,171 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:40:20,172 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 50 treesize of output 22 [2021-06-05 15:40:20,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:20,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:20,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:20,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:40:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:20,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352843672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:20,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:20,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:40:20,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676821508] [2021-06-05 15:40:20,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:40:20,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:20,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:40:20,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:40:20,240 INFO L87 Difference]: Start difference. First operand 21992 states and 58000 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:40:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:27,761 INFO L93 Difference]: Finished difference Result 53558 states and 141893 transitions. [2021-06-05 15:40:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 15:40:27,762 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:40:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:27,845 INFO L225 Difference]: With dead ends: 53558 [2021-06-05 15:40:27,845 INFO L226 Difference]: Without dead ends: 52355 [2021-06-05 15:40:27,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14187 ImplicationChecksByTransitivity, 6229.6ms TimeCoverageRelationStatistics Valid=5074, Invalid=31598, Unknown=0, NotChecked=0, Total=36672 [2021-06-05 15:40:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52355 states. [2021-06-05 15:40:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52355 to 22438. [2021-06-05 15:40:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22438 states, 22437 states have (on average 2.634398538128983) internal successors, (59108), 22437 states have internal predecessors, (59108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22438 states to 22438 states and 59108 transitions. [2021-06-05 15:40:28,412 INFO L78 Accepts]: Start accepts. Automaton has 22438 states and 59108 transitions. Word has length 43 [2021-06-05 15:40:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:28,412 INFO L482 AbstractCegarLoop]: Abstraction has 22438 states and 59108 transitions. [2021-06-05 15:40:28,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:40:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 22438 states and 59108 transitions. [2021-06-05 15:40:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:28,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:28,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:28,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:28,644 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1954334089, now seen corresponding path program 48 times [2021-06-05 15:40:28,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:28,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028858044] [2021-06-05 15:40:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:28,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028858044] [2021-06-05 15:40:28,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028858044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885148038] [2021-06-05 15:40:28,960 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:28,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:40:28,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:40:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:29,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:40:29,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 15:40:29,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:29,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:29,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:29,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 15:40:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:29,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885148038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:29,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:29,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:40:29,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949025636] [2021-06-05 15:40:29,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:40:29,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:29,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:40:29,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:40:29,698 INFO L87 Difference]: Start difference. First operand 22438 states and 59108 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:40:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:35,986 INFO L93 Difference]: Finished difference Result 42320 states and 111228 transitions. [2021-06-05 15:40:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 15:40:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:40:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:36,050 INFO L225 Difference]: With dead ends: 42320 [2021-06-05 15:40:36,050 INFO L226 Difference]: Without dead ends: 41609 [2021-06-05 15:40:36,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 4958.6ms TimeCoverageRelationStatistics Valid=3725, Invalid=23335, Unknown=0, NotChecked=0, Total=27060 [2021-06-05 15:40:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41609 states. [2021-06-05 15:40:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41609 to 23462. [2021-06-05 15:40:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 2.626699629171817) internal successors, (61625), 23461 states have internal predecessors, (61625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 61625 transitions. [2021-06-05 15:40:36,581 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 61625 transitions. Word has length 43 [2021-06-05 15:40:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:36,581 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 61625 transitions. [2021-06-05 15:40:36,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:40:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 61625 transitions. [2021-06-05 15:40:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:36,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:36,607 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:36,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:40:36,808 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1632170849, now seen corresponding path program 49 times [2021-06-05 15:40:36,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:36,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240768645] [2021-06-05 15:40:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:40:37,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240768645] [2021-06-05 15:40:37,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240768645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:37,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507928924] [2021-06-05 15:40:37,104 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:37,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:40:37,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:37,631 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:40:37,631 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 50 treesize of output 22 [2021-06-05 15:40:37,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:37,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:37,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:37,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:40:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:37,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507928924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:37,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:37,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:40:37,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815706493] [2021-06-05 15:40:37,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:40:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:40:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:40:37,695 INFO L87 Difference]: Start difference. First operand 23462 states and 61625 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:40:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:44,280 INFO L93 Difference]: Finished difference Result 44417 states and 116031 transitions. [2021-06-05 15:40:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-05 15:40:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 43 [2021-06-05 15:40:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:44,340 INFO L225 Difference]: With dead ends: 44417 [2021-06-05 15:40:44,341 INFO L226 Difference]: Without dead ends: 43235 [2021-06-05 15:40:44,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13733 ImplicationChecksByTransitivity, 5390.2ms TimeCoverageRelationStatistics Valid=4150, Invalid=29890, Unknown=0, NotChecked=0, Total=34040 [2021-06-05 15:40:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43235 states. [2021-06-05 15:40:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43235 to 21862. [2021-06-05 15:40:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21862 states, 21861 states have (on average 2.6247198206852387) internal successors, (57379), 21861 states have internal predecessors, (57379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21862 states to 21862 states and 57379 transitions. [2021-06-05 15:40:44,877 INFO L78 Accepts]: Start accepts. Automaton has 21862 states and 57379 transitions. Word has length 43 [2021-06-05 15:40:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:44,877 INFO L482 AbstractCegarLoop]: Abstraction has 21862 states and 57379 transitions. [2021-06-05 15:40:44,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-06-05 15:40:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 21862 states and 57379 transitions. [2021-06-05 15:40:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:44,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:44,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:45,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:45,104 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 446049553, now seen corresponding path program 50 times [2021-06-05 15:40:45,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:45,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888662368] [2021-06-05 15:40:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:40:45,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:45,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888662368] [2021-06-05 15:40:45,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888662368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:45,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369951037] [2021-06-05 15:40:45,368 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:45,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:40:45,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:40:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:45,904 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:40:45,904 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 50 treesize of output 22 [2021-06-05 15:40:45,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:45,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:45,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:45,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:40:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:45,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369951037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:45,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:45,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:40:45,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556237007] [2021-06-05 15:40:45,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:40:45,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:40:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:40:45,988 INFO L87 Difference]: Start difference. First operand 21862 states and 57379 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:52,607 INFO L93 Difference]: Finished difference Result 52606 states and 136330 transitions. [2021-06-05 15:40:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-05 15:40:52,607 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:40:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:52,692 INFO L225 Difference]: With dead ends: 52606 [2021-06-05 15:40:52,692 INFO L226 Difference]: Without dead ends: 52287 [2021-06-05 15:40:52,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10927 ImplicationChecksByTransitivity, 5462.0ms TimeCoverageRelationStatistics Valid=3986, Invalid=26116, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 15:40:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52287 states. [2021-06-05 15:40:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52287 to 22552. [2021-06-05 15:40:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22552 states, 22551 states have (on average 2.6213471686399714) internal successors, (59114), 22551 states have internal predecessors, (59114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22552 states to 22552 states and 59114 transitions. [2021-06-05 15:40:53,179 INFO L78 Accepts]: Start accepts. Automaton has 22552 states and 59114 transitions. Word has length 43 [2021-06-05 15:40:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:53,179 INFO L482 AbstractCegarLoop]: Abstraction has 22552 states and 59114 transitions. [2021-06-05 15:40:53,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22552 states and 59114 transitions. [2021-06-05 15:40:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:40:53,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:53,201 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:53,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 15:40:53,405 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1890627837, now seen corresponding path program 51 times [2021-06-05 15:40:53,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:53,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842122394] [2021-06-05 15:40:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:40:53,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:53,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842122394] [2021-06-05 15:40:53,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842122394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:53,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012152743] [2021-06-05 15:40:53,720 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:53,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:40:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:40:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:54,254 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:40:54,254 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 50 treesize of output 22 [2021-06-05 15:40:54,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:54,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:54,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:40:54,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:40:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:54,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012152743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:54,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:54,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 15:40:54,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258170169] [2021-06-05 15:40:54,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:40:54,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:40:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:40:54,323 INFO L87 Difference]: Start difference. First operand 22552 states and 59114 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:59,065 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 15:41:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:01,019 INFO L93 Difference]: Finished difference Result 52725 states and 138064 transitions. [2021-06-05 15:41:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 15:41:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:41:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:01,100 INFO L225 Difference]: With dead ends: 52725 [2021-06-05 15:41:01,101 INFO L226 Difference]: Without dead ends: 52097 [2021-06-05 15:41:01,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11810 ImplicationChecksByTransitivity, 5578.8ms TimeCoverageRelationStatistics Valid=4212, Invalid=26940, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 15:41:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52097 states. [2021-06-05 15:41:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52097 to 25356. [2021-06-05 15:41:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25356 states, 25355 states have (on average 2.6195227765726683) internal successors, (66418), 25355 states have internal predecessors, (66418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25356 states to 25356 states and 66418 transitions. [2021-06-05 15:41:01,694 INFO L78 Accepts]: Start accepts. Automaton has 25356 states and 66418 transitions. Word has length 43 [2021-06-05 15:41:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:01,694 INFO L482 AbstractCegarLoop]: Abstraction has 25356 states and 66418 transitions. [2021-06-05 15:41:01,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25356 states and 66418 transitions. [2021-06-05 15:41:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:01,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:01,721 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:01,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:41:01,921 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:01,922 INFO L82 PathProgramCache]: Analyzing trace with hash 821149183, now seen corresponding path program 52 times [2021-06-05 15:41:01,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:01,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796186448] [2021-06-05 15:41:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:41:02,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796186448] [2021-06-05 15:41:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796186448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312006004] [2021-06-05 15:41:02,182 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:02,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:02,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:41:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:02,731 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:41:02,731 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 50 treesize of output 22 [2021-06-05 15:41:02,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:02,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:02,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:02,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:41:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312006004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:02,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:02,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 15:41:02,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208724846] [2021-06-05 15:41:02,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:41:02,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:02,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:41:02,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:41:02,796 INFO L87 Difference]: Start difference. First operand 25356 states and 66418 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:09,313 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-05 15:41:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:10,754 INFO L93 Difference]: Finished difference Result 51875 states and 136134 transitions. [2021-06-05 15:41:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 15:41:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:41:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:10,826 INFO L225 Difference]: With dead ends: 51875 [2021-06-05 15:41:10,826 INFO L226 Difference]: Without dead ends: 50985 [2021-06-05 15:41:10,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14878 ImplicationChecksByTransitivity, 6307.0ms TimeCoverageRelationStatistics Valid=4543, Invalid=33287, Unknown=0, NotChecked=0, Total=37830 [2021-06-05 15:41:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50985 states. [2021-06-05 15:41:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50985 to 30858. [2021-06-05 15:41:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30858 states, 30857 states have (on average 2.614868587354571) internal successors, (80687), 30857 states have internal predecessors, (80687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30858 states to 30858 states and 80687 transitions. [2021-06-05 15:41:11,409 INFO L78 Accepts]: Start accepts. Automaton has 30858 states and 80687 transitions. Word has length 43 [2021-06-05 15:41:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:11,409 INFO L482 AbstractCegarLoop]: Abstraction has 30858 states and 80687 transitions. [2021-06-05 15:41:11,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30858 states and 80687 transitions. [2021-06-05 15:41:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:11,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:11,443 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:11,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:11,644 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1239161813, now seen corresponding path program 53 times [2021-06-05 15:41:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:11,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080298992] [2021-06-05 15:41:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:11,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:11,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080298992] [2021-06-05 15:41:11,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080298992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:11,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25356981] [2021-06-05 15:41:11,887 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:11,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:41:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:11,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:41:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:12,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:12,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 15:41:12,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:12,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:12,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:12,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:10 [2021-06-05 15:41:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:12,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25356981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:12,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:12,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:41:12,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460721095] [2021-06-05 15:41:12,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:41:12,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:41:12,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:41:12,797 INFO L87 Difference]: Start difference. First operand 30858 states and 80687 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:41:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:20,694 INFO L93 Difference]: Finished difference Result 76344 states and 199558 transitions. [2021-06-05 15:41:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 15:41:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:41:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:20,799 INFO L225 Difference]: With dead ends: 76344 [2021-06-05 15:41:20,799 INFO L226 Difference]: Without dead ends: 75918 [2021-06-05 15:41:20,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10917 ImplicationChecksByTransitivity, 5779.2ms TimeCoverageRelationStatistics Valid=3708, Invalid=26048, Unknown=0, NotChecked=0, Total=29756 [2021-06-05 15:41:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75918 states. [2021-06-05 15:41:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75918 to 34178. [2021-06-05 15:41:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34178 states, 34177 states have (on average 2.6042952863036546) internal successors, (89007), 34177 states have internal predecessors, (89007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34178 states to 34178 states and 89007 transitions. [2021-06-05 15:41:21,549 INFO L78 Accepts]: Start accepts. Automaton has 34178 states and 89007 transitions. Word has length 43 [2021-06-05 15:41:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:21,549 INFO L482 AbstractCegarLoop]: Abstraction has 34178 states and 89007 transitions. [2021-06-05 15:41:21,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:41:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 34178 states and 89007 transitions. [2021-06-05 15:41:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:21,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:21,585 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:21,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:21,789 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2064437585, now seen corresponding path program 54 times [2021-06-05 15:41:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:21,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284455725] [2021-06-05 15:41:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:22,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:22,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284455725] [2021-06-05 15:41:22,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284455725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:22,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022730059] [2021-06-05 15:41:22,039 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:22,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:41:22,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:22,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:41:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:22,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:41:22,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:41:22,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 15:41:22,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:22,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:22,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:22,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 15:41:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:22,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022730059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:22,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:22,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:41:22,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627733253] [2021-06-05 15:41:22,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:41:22,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:41:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:41:22,863 INFO L87 Difference]: Start difference. First operand 34178 states and 89007 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:41:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:29,030 INFO L93 Difference]: Finished difference Result 58808 states and 153180 transitions. [2021-06-05 15:41:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 15:41:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 43 [2021-06-05 15:41:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:29,121 INFO L225 Difference]: With dead ends: 58808 [2021-06-05 15:41:29,121 INFO L226 Difference]: Without dead ends: 58636 [2021-06-05 15:41:29,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 4935.1ms TimeCoverageRelationStatistics Valid=3127, Invalid=18925, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 15:41:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58636 states. [2021-06-05 15:41:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58636 to 32974. [2021-06-05 15:41:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32974 states, 32973 states have (on average 2.6076790100991722) internal successors, (85983), 32973 states have internal predecessors, (85983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32974 states to 32974 states and 85983 transitions. [2021-06-05 15:41:29,854 INFO L78 Accepts]: Start accepts. Automaton has 32974 states and 85983 transitions. Word has length 43 [2021-06-05 15:41:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:29,854 INFO L482 AbstractCegarLoop]: Abstraction has 32974 states and 85983 transitions. [2021-06-05 15:41:29,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2021-06-05 15:41:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32974 states and 85983 transitions. [2021-06-05 15:41:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:29,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:29,890 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:30,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:41:30,090 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash -16448189, now seen corresponding path program 55 times [2021-06-05 15:41:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:30,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883800721] [2021-06-05 15:41:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:41:30,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:30,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883800721] [2021-06-05 15:41:30,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883800721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:30,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752410380] [2021-06-05 15:41:30,351 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:30,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:41:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:30,878 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:41:30,878 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 50 treesize of output 22 [2021-06-05 15:41:30,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:30,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:30,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:30,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:41:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:30,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752410380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:30,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:30,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 15:41:30,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122728879] [2021-06-05 15:41:30,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:41:30,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:30,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:41:30,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:41:30,947 INFO L87 Difference]: Start difference. First operand 32974 states and 85983 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:36,426 INFO L93 Difference]: Finished difference Result 54518 states and 141071 transitions. [2021-06-05 15:41:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 15:41:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:41:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:36,503 INFO L225 Difference]: With dead ends: 54518 [2021-06-05 15:41:36,504 INFO L226 Difference]: Without dead ends: 54068 [2021-06-05 15:41:36,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8388 ImplicationChecksByTransitivity, 4475.5ms TimeCoverageRelationStatistics Valid=3168, Invalid=20088, Unknown=0, NotChecked=0, Total=23256 [2021-06-05 15:41:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54068 states. [2021-06-05 15:41:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54068 to 33126. [2021-06-05 15:41:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33126 states, 33125 states have (on average 2.6063396226415096) internal successors, (86335), 33125 states have internal predecessors, (86335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33126 states to 33126 states and 86335 transitions. [2021-06-05 15:41:37,125 INFO L78 Accepts]: Start accepts. Automaton has 33126 states and 86335 transitions. Word has length 43 [2021-06-05 15:41:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:37,125 INFO L482 AbstractCegarLoop]: Abstraction has 33126 states and 86335 transitions. [2021-06-05 15:41:37,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 33126 states and 86335 transitions. [2021-06-05 15:41:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:37,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:37,166 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:37,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:37,366 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash 768210755, now seen corresponding path program 56 times [2021-06-05 15:41:37,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:37,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56600612] [2021-06-05 15:41:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:37,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:37,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56600612] [2021-06-05 15:41:37,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56600612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:37,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096502377] [2021-06-05 15:41:37,579 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:37,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:37,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:41:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:38,093 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:41:38,093 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 50 treesize of output 22 [2021-06-05 15:41:38,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:38,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:38,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:38,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:41:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096502377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:38,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:38,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 15:41:38,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836369227] [2021-06-05 15:41:38,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:41:38,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:41:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:41:38,159 INFO L87 Difference]: Start difference. First operand 33126 states and 86335 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:44,758 INFO L93 Difference]: Finished difference Result 56520 states and 146433 transitions. [2021-06-05 15:41:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 15:41:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:41:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:44,838 INFO L225 Difference]: With dead ends: 56520 [2021-06-05 15:41:44,838 INFO L226 Difference]: Without dead ends: 56166 [2021-06-05 15:41:44,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11908 ImplicationChecksByTransitivity, 5164.3ms TimeCoverageRelationStatistics Valid=3892, Invalid=27260, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 15:41:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56166 states. [2021-06-05 15:41:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56166 to 33074. [2021-06-05 15:41:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33074 states, 33073 states have (on average 2.6075650833005777) internal successors, (86240), 33073 states have internal predecessors, (86240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33074 states to 33074 states and 86240 transitions. [2021-06-05 15:41:45,486 INFO L78 Accepts]: Start accepts. Automaton has 33074 states and 86240 transitions. Word has length 43 [2021-06-05 15:41:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:45,486 INFO L482 AbstractCegarLoop]: Abstraction has 33074 states and 86240 transitions. [2021-06-05 15:41:45,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33074 states and 86240 transitions. [2021-06-05 15:41:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:45,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:45,522 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:45,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:45,723 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1813418433, now seen corresponding path program 57 times [2021-06-05 15:41:45,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:45,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370595099] [2021-06-05 15:41:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:45,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370595099] [2021-06-05 15:41:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370595099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038085411] [2021-06-05 15:41:45,992 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:46,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:41:46,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:41:46,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:46,549 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:41:46,549 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 50 treesize of output 22 [2021-06-05 15:41:46,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:46,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:41:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:46,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038085411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:46,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:41:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594608432] [2021-06-05 15:41:46,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:41:46,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:41:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:41:46,623 INFO L87 Difference]: Start difference. First operand 33074 states and 86240 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:41:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:51,040 INFO L93 Difference]: Finished difference Result 51180 states and 133041 transitions. [2021-06-05 15:41:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 15:41:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:41:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:51,117 INFO L225 Difference]: With dead ends: 51180 [2021-06-05 15:41:51,117 INFO L226 Difference]: Without dead ends: 50194 [2021-06-05 15:41:51,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5914 ImplicationChecksByTransitivity, 3681.2ms TimeCoverageRelationStatistics Valid=2552, Invalid=15270, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 15:41:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50194 states. [2021-06-05 15:41:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50194 to 34498. [2021-06-05 15:41:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34498 states, 34497 states have (on average 2.606052700234803) internal successors, (89901), 34497 states have internal predecessors, (89901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34498 states to 34498 states and 89901 transitions. [2021-06-05 15:41:51,713 INFO L78 Accepts]: Start accepts. Automaton has 34498 states and 89901 transitions. Word has length 43 [2021-06-05 15:41:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:51,714 INFO L482 AbstractCegarLoop]: Abstraction has 34498 states and 89901 transitions. [2021-06-05 15:41:51,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:41:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34498 states and 89901 transitions. [2021-06-05 15:41:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:51,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:51,750 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:51,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:51,953 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 835626841, now seen corresponding path program 58 times [2021-06-05 15:41:51,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:51,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162974873] [2021-06-05 15:41:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:52,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:52,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162974873] [2021-06-05 15:41:52,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162974873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:52,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166476425] [2021-06-05 15:41:52,213 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:52,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:41:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:52,913 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:41:52,913 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 50 treesize of output 22 [2021-06-05 15:41:52,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:52,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:41:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166476425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:52,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:52,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:41:52,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320421937] [2021-06-05 15:41:52,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:41:52,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:41:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:41:52,986 INFO L87 Difference]: Start difference. First operand 34498 states and 89901 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:41:57,637 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 15:41:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:59,229 INFO L93 Difference]: Finished difference Result 50970 states and 132040 transitions. [2021-06-05 15:41:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 15:41:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:41:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:59,306 INFO L225 Difference]: With dead ends: 50970 [2021-06-05 15:41:59,306 INFO L226 Difference]: Without dead ends: 50500 [2021-06-05 15:41:59,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 5574.0ms TimeCoverageRelationStatistics Valid=4304, Invalid=22756, Unknown=0, NotChecked=0, Total=27060 [2021-06-05 15:41:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50500 states. [2021-06-05 15:41:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50500 to 34480. [2021-06-05 15:41:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.6040198381623596) internal successors, (89784), 34479 states have internal predecessors, (89784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 89784 transitions. [2021-06-05 15:41:59,920 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 89784 transitions. Word has length 43 [2021-06-05 15:41:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:59,920 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 89784 transitions. [2021-06-05 15:41:59,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:41:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 89784 transitions. [2021-06-05 15:41:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:41:59,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:59,959 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:00,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 15:42:00,161 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -155741057, now seen corresponding path program 59 times [2021-06-05 15:42:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:00,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053966922] [2021-06-05 15:42:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:00,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:00,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053966922] [2021-06-05 15:42:00,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053966922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:00,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490980384] [2021-06-05 15:42:00,435 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:00,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:42:00,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:00,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:42:00,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:01,005 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:01,006 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 50 treesize of output 22 [2021-06-05 15:42:01,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:01,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:01,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490980384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:01,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:01,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:42:01,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123370684] [2021-06-05 15:42:01,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:42:01,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:42:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:42:01,081 INFO L87 Difference]: Start difference. First operand 34480 states and 89784 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:06,758 INFO L93 Difference]: Finished difference Result 50258 states and 130327 transitions. [2021-06-05 15:42:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 15:42:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:42:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:06,834 INFO L225 Difference]: With dead ends: 50258 [2021-06-05 15:42:06,834 INFO L226 Difference]: Without dead ends: 49346 [2021-06-05 15:42:06,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7705 ImplicationChecksByTransitivity, 4956.1ms TimeCoverageRelationStatistics Valid=3493, Invalid=19157, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:42:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49346 states. [2021-06-05 15:42:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49346 to 34988. [2021-06-05 15:42:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34988 states, 34987 states have (on average 2.5989939120244663) internal successors, (90931), 34987 states have internal predecessors, (90931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34988 states to 34988 states and 90931 transitions. [2021-06-05 15:42:07,509 INFO L78 Accepts]: Start accepts. Automaton has 34988 states and 90931 transitions. Word has length 43 [2021-06-05 15:42:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:07,509 INFO L482 AbstractCegarLoop]: Abstraction has 34988 states and 90931 transitions. [2021-06-05 15:42:07,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34988 states and 90931 transitions. [2021-06-05 15:42:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:07,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:07,546 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:07,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:07,747 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:07,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1440813171, now seen corresponding path program 60 times [2021-06-05 15:42:07,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:07,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234633868] [2021-06-05 15:42:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:08,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234633868] [2021-06-05 15:42:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234633868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562781922] [2021-06-05 15:42:08,075 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:08,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:42:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:42:08,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:08,625 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:08,625 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 50 treesize of output 22 [2021-06-05 15:42:08,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:08,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:08,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:08,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562781922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:08,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:08,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:42:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214539974] [2021-06-05 15:42:08,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:42:08,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:08,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:42:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:42:08,697 INFO L87 Difference]: Start difference. First operand 34988 states and 90931 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:11,437 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-06-05 15:42:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:13,946 INFO L93 Difference]: Finished difference Result 66217 states and 172225 transitions. [2021-06-05 15:42:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 15:42:13,946 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:42:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:14,043 INFO L225 Difference]: With dead ends: 66217 [2021-06-05 15:42:14,043 INFO L226 Difference]: Without dead ends: 65095 [2021-06-05 15:42:14,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7329 ImplicationChecksByTransitivity, 4058.9ms TimeCoverageRelationStatistics Valid=2811, Invalid=18069, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 15:42:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65095 states. [2021-06-05 15:42:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65095 to 36274. [2021-06-05 15:42:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36274 states, 36273 states have (on average 2.5966696992253193) internal successors, (94189), 36273 states have internal predecessors, (94189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36274 states to 36274 states and 94189 transitions. [2021-06-05 15:42:14,766 INFO L78 Accepts]: Start accepts. Automaton has 36274 states and 94189 transitions. Word has length 43 [2021-06-05 15:42:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:14,766 INFO L482 AbstractCegarLoop]: Abstraction has 36274 states and 94189 transitions. [2021-06-05 15:42:14,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36274 states and 94189 transitions. [2021-06-05 15:42:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:14,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:14,806 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:15,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:15,018 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash -421896627, now seen corresponding path program 61 times [2021-06-05 15:42:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:15,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459572354] [2021-06-05 15:42:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:15,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459572354] [2021-06-05 15:42:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459572354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126699415] [2021-06-05 15:42:15,442 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:42:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:15,986 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:15,987 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 50 treesize of output 22 [2021-06-05 15:42:15,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:15,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:15,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:15,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:16,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126699415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:16,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:16,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:42:16,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562862403] [2021-06-05 15:42:16,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:42:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:42:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:42:16,057 INFO L87 Difference]: Start difference. First operand 36274 states and 94189 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:22,967 INFO L93 Difference]: Finished difference Result 69190 states and 180203 transitions. [2021-06-05 15:42:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-05 15:42:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:42:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:23,066 INFO L225 Difference]: With dead ends: 69190 [2021-06-05 15:42:23,066 INFO L226 Difference]: Without dead ends: 68489 [2021-06-05 15:42:23,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11327 ImplicationChecksByTransitivity, 5740.2ms TimeCoverageRelationStatistics Valid=4164, Invalid=26636, Unknown=0, NotChecked=0, Total=30800 [2021-06-05 15:42:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68489 states. [2021-06-05 15:42:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68489 to 41444. [2021-06-05 15:42:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41444 states, 41443 states have (on average 2.5922109885867335) internal successors, (107429), 41443 states have internal predecessors, (107429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41444 states to 41444 states and 107429 transitions. [2021-06-05 15:42:23,853 INFO L78 Accepts]: Start accepts. Automaton has 41444 states and 107429 transitions. Word has length 43 [2021-06-05 15:42:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:23,853 INFO L482 AbstractCegarLoop]: Abstraction has 41444 states and 107429 transitions. [2021-06-05 15:42:23,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 41444 states and 107429 transitions. [2021-06-05 15:42:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:23,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:23,896 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:24,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:24,096 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1254279549, now seen corresponding path program 62 times [2021-06-05 15:42:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:24,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108390458] [2021-06-05 15:42:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:24,485 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 15:42:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:42:24,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:24,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108390458] [2021-06-05 15:42:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108390458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845440779] [2021-06-05 15:42:24,510 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:24,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:24,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:42:24,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:25,089 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:25,089 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 50 treesize of output 22 [2021-06-05 15:42:25,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:25,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:25,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:25,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:25,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845440779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:25,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:25,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:42:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409378514] [2021-06-05 15:42:25,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:42:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:42:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:42:25,161 INFO L87 Difference]: Start difference. First operand 41444 states and 107429 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:33,428 INFO L93 Difference]: Finished difference Result 82935 states and 213989 transitions. [2021-06-05 15:42:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 15:42:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:42:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:33,580 INFO L225 Difference]: With dead ends: 82935 [2021-06-05 15:42:33,580 INFO L226 Difference]: Without dead ends: 82258 [2021-06-05 15:42:33,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13846 ImplicationChecksByTransitivity, 6691.2ms TimeCoverageRelationStatistics Valid=5046, Invalid=32010, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 15:42:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82258 states. [2021-06-05 15:42:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82258 to 42748. [2021-06-05 15:42:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42748 states, 42747 states have (on average 2.5865908718740496) internal successors, (110569), 42747 states have internal predecessors, (110569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42748 states to 42748 states and 110569 transitions. [2021-06-05 15:42:34,675 INFO L78 Accepts]: Start accepts. Automaton has 42748 states and 110569 transitions. Word has length 43 [2021-06-05 15:42:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:34,675 INFO L482 AbstractCegarLoop]: Abstraction has 42748 states and 110569 transitions. [2021-06-05 15:42:34,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 42748 states and 110569 transitions. [2021-06-05 15:42:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:34,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:34,717 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:34,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:34,918 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1888042687, now seen corresponding path program 63 times [2021-06-05 15:42:34,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:34,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670538675] [2021-06-05 15:42:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:42:35,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670538675] [2021-06-05 15:42:35,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670538675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:35,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846070269] [2021-06-05 15:42:35,122 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:35,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:42:35,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:42:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:35,635 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:35,635 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 50 treesize of output 22 [2021-06-05 15:42:35,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:35,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846070269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:35,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:35,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:42:35,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628171139] [2021-06-05 15:42:35,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:42:35,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:42:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:42:35,702 INFO L87 Difference]: Start difference. First operand 42748 states and 110569 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:38,152 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-06-05 15:42:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:41,327 INFO L93 Difference]: Finished difference Result 78182 states and 200986 transitions. [2021-06-05 15:42:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-05 15:42:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:42:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:41,439 INFO L225 Difference]: With dead ends: 78182 [2021-06-05 15:42:41,439 INFO L226 Difference]: Without dead ends: 77766 [2021-06-05 15:42:41,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 4680.9ms TimeCoverageRelationStatistics Valid=3303, Invalid=23103, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 15:42:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77766 states. [2021-06-05 15:42:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77766 to 43178. [2021-06-05 15:42:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 2.5850568589758436) internal successors, (111615), 43177 states have internal predecessors, (111615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 111615 transitions. [2021-06-05 15:42:42,311 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 111615 transitions. Word has length 43 [2021-06-05 15:42:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:42,311 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 111615 transitions. [2021-06-05 15:42:42,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 111615 transitions. [2021-06-05 15:42:42,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:42,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:42,354 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:42,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:42,575 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1766160425, now seen corresponding path program 64 times [2021-06-05 15:42:42,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:42,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297156188] [2021-06-05 15:42:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:42:42,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:42,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297156188] [2021-06-05 15:42:42,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297156188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:42,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453435921] [2021-06-05 15:42:42,817 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:42,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:42,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:42:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:43,327 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:43,327 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 50 treesize of output 22 [2021-06-05 15:42:43,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:43,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:43,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:43,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:43,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453435921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:43,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:43,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 15:42:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247610039] [2021-06-05 15:42:43,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:42:43,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:43,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:42:43,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:42:43,395 INFO L87 Difference]: Start difference. First operand 43178 states and 111615 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:44,234 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 15:42:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:48,872 INFO L93 Difference]: Finished difference Result 62543 states and 160562 transitions. [2021-06-05 15:42:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 15:42:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:42:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:48,960 INFO L225 Difference]: With dead ends: 62543 [2021-06-05 15:42:48,960 INFO L226 Difference]: Without dead ends: 62315 [2021-06-05 15:42:48,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9536 ImplicationChecksByTransitivity, 4860.0ms TimeCoverageRelationStatistics Valid=3394, Invalid=22046, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 15:42:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-06-05 15:42:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 43786. [2021-06-05 15:42:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.582254196642686) internal successors, (113064), 43785 states have internal predecessors, (113064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 113064 transitions. [2021-06-05 15:42:49,883 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 113064 transitions. Word has length 43 [2021-06-05 15:42:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:49,883 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 113064 transitions. [2021-06-05 15:42:49,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 113064 transitions. [2021-06-05 15:42:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:49,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:49,924 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:50,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:50,129 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1317965889, now seen corresponding path program 65 times [2021-06-05 15:42:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:50,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314175250] [2021-06-05 15:42:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:50,324 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 15:42:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:50,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:50,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314175250] [2021-06-05 15:42:50,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314175250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:50,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994534561] [2021-06-05 15:42:50,618 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:50,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:42:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:42:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:51,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:42:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:42:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 15:42:51,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:51,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:51,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:51,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-06-05 15:42:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:51,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994534561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:51,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:51,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:42:51,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708329924] [2021-06-05 15:42:51,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:42:51,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:42:51,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:42:51,438 INFO L87 Difference]: Start difference. First operand 43786 states and 113064 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:56,537 INFO L93 Difference]: Finished difference Result 61157 states and 157678 transitions. [2021-06-05 15:42:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 15:42:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:42:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:56,621 INFO L225 Difference]: With dead ends: 61157 [2021-06-05 15:42:56,621 INFO L226 Difference]: Without dead ends: 60050 [2021-06-05 15:42:56,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6467 ImplicationChecksByTransitivity, 4512.3ms TimeCoverageRelationStatistics Valid=2723, Invalid=16737, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 15:42:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60050 states. [2021-06-05 15:42:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60050 to 44366. [2021-06-05 15:42:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44366 states, 44365 states have (on average 2.580637890228784) internal successors, (114490), 44365 states have internal predecessors, (114490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44366 states to 44366 states and 114490 transitions. [2021-06-05 15:42:57,390 INFO L78 Accepts]: Start accepts. Automaton has 44366 states and 114490 transitions. Word has length 43 [2021-06-05 15:42:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:57,390 INFO L482 AbstractCegarLoop]: Abstraction has 44366 states and 114490 transitions. [2021-06-05 15:42:57,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:42:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 44366 states and 114490 transitions. [2021-06-05 15:42:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:42:57,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:57,436 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 15:42:57,637 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1331079385, now seen corresponding path program 66 times [2021-06-05 15:42:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:57,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94442509] [2021-06-05 15:42:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:57,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94442509] [2021-06-05 15:42:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94442509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125077760] [2021-06-05 15:42:57,898 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:57,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:42:57,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:57,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:42:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:58,537 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:42:58,537 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 50 treesize of output 22 [2021-06-05 15:42:58,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:58,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:58,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:58,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:42:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:58,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125077760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:58,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:58,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:42:58,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850445830] [2021-06-05 15:42:58,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:42:58,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:58,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:42:58,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:42:58,613 INFO L87 Difference]: Start difference. First operand 44366 states and 114490 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:05,182 INFO L93 Difference]: Finished difference Result 59354 states and 152483 transitions. [2021-06-05 15:43:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 15:43:05,183 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:43:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:05,264 INFO L225 Difference]: With dead ends: 59354 [2021-06-05 15:43:05,265 INFO L226 Difference]: Without dead ends: 58884 [2021-06-05 15:43:05,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10503 ImplicationChecksByTransitivity, 5782.5ms TimeCoverageRelationStatistics Valid=4494, Invalid=24918, Unknown=0, NotChecked=0, Total=29412 [2021-06-05 15:43:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2021-06-05 15:43:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 44338. [2021-06-05 15:43:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44338 states, 44337 states have (on average 2.5801475065971986) internal successors, (114396), 44337 states have internal predecessors, (114396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44338 states to 44338 states and 114396 transitions. [2021-06-05 15:43:06,017 INFO L78 Accepts]: Start accepts. Automaton has 44338 states and 114396 transitions. Word has length 43 [2021-06-05 15:43:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:06,018 INFO L482 AbstractCegarLoop]: Abstraction has 44338 states and 114396 transitions. [2021-06-05 15:43:06,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 44338 states and 114396 transitions. [2021-06-05 15:43:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:06,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:06,061 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:06,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:06,262 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 339711487, now seen corresponding path program 67 times [2021-06-05 15:43:06,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:06,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510501195] [2021-06-05 15:43:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:06,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510501195] [2021-06-05 15:43:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510501195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304103061] [2021-06-05 15:43:06,596 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:06,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:43:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:07,379 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:43:07,380 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 50 treesize of output 22 [2021-06-05 15:43:07,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:07,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:07,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:07,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:43:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:07,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304103061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:07,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:07,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:43:07,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874178724] [2021-06-05 15:43:07,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:43:07,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:43:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:43:07,464 INFO L87 Difference]: Start difference. First operand 44338 states and 114396 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:13,376 INFO L93 Difference]: Finished difference Result 56803 states and 146198 transitions. [2021-06-05 15:43:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 15:43:13,376 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:43:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:13,459 INFO L225 Difference]: With dead ends: 56803 [2021-06-05 15:43:13,459 INFO L226 Difference]: Without dead ends: 56159 [2021-06-05 15:43:13,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7134 ImplicationChecksByTransitivity, 5297.9ms TimeCoverageRelationStatistics Valid=3364, Invalid=18392, Unknown=0, NotChecked=0, Total=21756 [2021-06-05 15:43:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56159 states. [2021-06-05 15:43:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56159 to 44676. [2021-06-05 15:43:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44676 states, 44675 states have (on average 2.5777504196978174) internal successors, (115161), 44675 states have internal predecessors, (115161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44676 states to 44676 states and 115161 transitions. [2021-06-05 15:43:14,343 INFO L78 Accepts]: Start accepts. Automaton has 44676 states and 115161 transitions. Word has length 43 [2021-06-05 15:43:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:14,343 INFO L482 AbstractCegarLoop]: Abstraction has 44676 states and 115161 transitions. [2021-06-05 15:43:14,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 44676 states and 115161 transitions. [2021-06-05 15:43:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:14,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:14,392 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:14,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:14,593 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash -945360627, now seen corresponding path program 68 times [2021-06-05 15:43:14,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:14,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737449144] [2021-06-05 15:43:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:14,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:14,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737449144] [2021-06-05 15:43:14,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737449144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:14,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335600504] [2021-06-05 15:43:14,840 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:14,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:14,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:43:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:15,381 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 15:43:15,563 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:43:15,563 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 50 treesize of output 22 [2021-06-05 15:43:15,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:15,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:15,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:15,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:43:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335600504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:15,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:15,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:43:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406716138] [2021-06-05 15:43:15,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:43:15,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:15,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:43:15,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:43:15,635 INFO L87 Difference]: Start difference. First operand 44676 states and 115161 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:20,311 INFO L93 Difference]: Finished difference Result 67792 states and 175050 transitions. [2021-06-05 15:43:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 15:43:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:43:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:20,406 INFO L225 Difference]: With dead ends: 67792 [2021-06-05 15:43:20,406 INFO L226 Difference]: Without dead ends: 66797 [2021-06-05 15:43:20,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6148 ImplicationChecksByTransitivity, 3871.8ms TimeCoverageRelationStatistics Valid=2542, Invalid=15818, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 15:43:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66797 states. [2021-06-05 15:43:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66797 to 47392. [2021-06-05 15:43:21,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47392 states, 47391 states have (on average 2.5755945221666563) internal successors, (122060), 47391 states have internal predecessors, (122060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47392 states to 47392 states and 122060 transitions. [2021-06-05 15:43:21,460 INFO L78 Accepts]: Start accepts. Automaton has 47392 states and 122060 transitions. Word has length 43 [2021-06-05 15:43:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:21,460 INFO L482 AbstractCegarLoop]: Abstraction has 47392 states and 122060 transitions. [2021-06-05 15:43:21,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 47392 states and 122060 transitions. [2021-06-05 15:43:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:21,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:21,514 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:21,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:21,714 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash 948961809, now seen corresponding path program 69 times [2021-06-05 15:43:21,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:21,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545885596] [2021-06-05 15:43:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:21,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545885596] [2021-06-05 15:43:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545885596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549131497] [2021-06-05 15:43:21,965 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:22,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:43:22,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:43:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:22,656 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:43:22,656 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 50 treesize of output 22 [2021-06-05 15:43:22,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:22,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:22,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:22,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:43:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:22,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549131497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:22,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:22,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 15:43:22,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583379006] [2021-06-05 15:43:22,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:43:22,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:43:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:43:22,729 INFO L87 Difference]: Start difference. First operand 47392 states and 122060 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:30,024 INFO L93 Difference]: Finished difference Result 72464 states and 186435 transitions. [2021-06-05 15:43:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 15:43:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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 43 [2021-06-05 15:43:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:30,117 INFO L225 Difference]: With dead ends: 72464 [2021-06-05 15:43:30,117 INFO L226 Difference]: Without dead ends: 71461 [2021-06-05 15:43:30,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12076 ImplicationChecksByTransitivity, 6170.6ms TimeCoverageRelationStatistics Valid=4790, Invalid=27790, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 15:43:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71461 states. [2021-06-05 15:43:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71461 to 48146. [2021-06-05 15:43:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48146 states, 48145 states have (on average 2.5708796344376363) internal successors, (123775), 48145 states have internal predecessors, (123775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48146 states to 48146 states and 123775 transitions. [2021-06-05 15:43:30,945 INFO L78 Accepts]: Start accepts. Automaton has 48146 states and 123775 transitions. Word has length 43 [2021-06-05 15:43:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:30,945 INFO L482 AbstractCegarLoop]: Abstraction has 48146 states and 123775 transitions. [2021-06-05 15:43:30,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 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) [2021-06-05 15:43:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 48146 states and 123775 transitions. [2021-06-05 15:43:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:30,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:30,991 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:31,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 15:43:31,191 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1074030681, now seen corresponding path program 70 times [2021-06-05 15:43:31,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:31,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219890051] [2021-06-05 15:43:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:31,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:31,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219890051] [2021-06-05 15:43:31,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219890051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:31,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771165503] [2021-06-05 15:43:31,414 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:31,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:43:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:31,956 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:43:31,957 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 50 treesize of output 22 [2021-06-05 15:43:31,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:31,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:31,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:31,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:43:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:32,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771165503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:32,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:32,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:43:32,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844956204] [2021-06-05 15:43:32,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:43:32,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:43:32,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:43:32,165 INFO L87 Difference]: Start difference. First operand 48146 states and 123775 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:43:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:38,931 INFO L93 Difference]: Finished difference Result 100466 states and 258593 transitions. [2021-06-05 15:43:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 15:43:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:43:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:39,097 INFO L225 Difference]: With dead ends: 100466 [2021-06-05 15:43:39,097 INFO L226 Difference]: Without dead ends: 99703 [2021-06-05 15:43:39,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10642 ImplicationChecksByTransitivity, 5310.7ms TimeCoverageRelationStatistics Valid=3660, Invalid=25410, Unknown=0, NotChecked=0, Total=29070 [2021-06-05 15:43:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99703 states. [2021-06-05 15:43:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99703 to 50130. [2021-06-05 15:43:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.5679546769335118) internal successors, (128729), 50129 states have internal predecessors, (128729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 128729 transitions. [2021-06-05 15:43:40,465 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 128729 transitions. Word has length 43 [2021-06-05 15:43:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:40,466 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 128729 transitions. [2021-06-05 15:43:40,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:43:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 128729 transitions. [2021-06-05 15:43:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:40,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:40,518 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:40,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 15:43:40,719 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1488545191, now seen corresponding path program 71 times [2021-06-05 15:43:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:40,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610501400] [2021-06-05 15:43:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:40,961 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 15:43:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:41,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610501400] [2021-06-05 15:43:41,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610501400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058186944] [2021-06-05 15:43:41,130 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:41,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:43:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:43:41,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:41,662 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:43:41,662 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 50 treesize of output 22 [2021-06-05 15:43:41,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:41,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:43:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:41,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058186944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:41,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:41,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:43:41,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252649214] [2021-06-05 15:43:41,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:43:41,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:43:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:43:41,733 INFO L87 Difference]: Start difference. First operand 50130 states and 128729 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:43:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:51,157 INFO L93 Difference]: Finished difference Result 91246 states and 235782 transitions. [2021-06-05 15:43:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-06-05 15:43:51,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:43:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:51,284 INFO L225 Difference]: With dead ends: 91246 [2021-06-05 15:43:51,284 INFO L226 Difference]: Without dead ends: 90154 [2021-06-05 15:43:51,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17867 ImplicationChecksByTransitivity, 7361.1ms TimeCoverageRelationStatistics Valid=5977, Invalid=39605, Unknown=0, NotChecked=0, Total=45582 [2021-06-05 15:43:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90154 states. [2021-06-05 15:43:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90154 to 47190. [2021-06-05 15:43:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47190 states, 47189 states have (on average 2.5532009578503465) internal successors, (120483), 47189 states have internal predecessors, (120483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47190 states to 47190 states and 120483 transitions. [2021-06-05 15:43:52,391 INFO L78 Accepts]: Start accepts. Automaton has 47190 states and 120483 transitions. Word has length 43 [2021-06-05 15:43:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:52,391 INFO L482 AbstractCegarLoop]: Abstraction has 47190 states and 120483 transitions. [2021-06-05 15:43:52,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:43:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 47190 states and 120483 transitions. [2021-06-05 15:43:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:52,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:52,437 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:52,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:52,638 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash -78287429, now seen corresponding path program 72 times [2021-06-05 15:43:52,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:52,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047675592] [2021-06-05 15:43:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:43:52,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:52,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047675592] [2021-06-05 15:43:52,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047675592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:52,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996301432] [2021-06-05 15:43:52,855 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:52,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:43:52,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:52,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:43:52,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:53,501 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:43:53,501 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 50 treesize of output 22 [2021-06-05 15:43:53,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:53,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:53,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:53,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:43:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996301432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:53,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:53,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 15:43:53,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168056628] [2021-06-05 15:43:53,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:43:53,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:43:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:43:53,571 INFO L87 Difference]: Start difference. First operand 47190 states and 120483 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-06-05 15:43:54,839 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-06-05 15:43:58,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:58,790 INFO L93 Difference]: Finished difference Result 66174 states and 167928 transitions. [2021-06-05 15:43:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 15:43:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 43 [2021-06-05 15:43:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:58,921 INFO L225 Difference]: With dead ends: 66174 [2021-06-05 15:43:58,921 INFO L226 Difference]: Without dead ends: 65870 [2021-06-05 15:43:58,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 4436.9ms TimeCoverageRelationStatistics Valid=3106, Invalid=18946, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 15:43:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65870 states. [2021-06-05 15:43:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65870 to 46632. [2021-06-05 15:43:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46632 states, 46631 states have (on average 2.554995603782891) internal successors, (119142), 46631 states have internal predecessors, (119142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46632 states to 46632 states and 119142 transitions. [2021-06-05 15:43:59,800 INFO L78 Accepts]: Start accepts. Automaton has 46632 states and 119142 transitions. Word has length 43 [2021-06-05 15:43:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:59,800 INFO L482 AbstractCegarLoop]: Abstraction has 46632 states and 119142 transitions. [2021-06-05 15:43:59,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-06-05 15:43:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 46632 states and 119142 transitions. [2021-06-05 15:43:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:43:59,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:59,847 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:00,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 15:44:00,048 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1134775143, now seen corresponding path program 73 times [2021-06-05 15:44:00,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:00,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749244765] [2021-06-05 15:44:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:00,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:00,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749244765] [2021-06-05 15:44:00,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749244765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:00,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169734405] [2021-06-05 15:44:00,283 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:00,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:00,839 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:00,839 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 50 treesize of output 22 [2021-06-05 15:44:00,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:00,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:00,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:00,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:01,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169734405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:01,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:01,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:01,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577206629] [2021-06-05 15:44:01,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:01,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:01,080 INFO L87 Difference]: Start difference. First operand 46632 states and 119142 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:44:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:05,833 INFO L93 Difference]: Finished difference Result 72140 states and 184136 transitions. [2021-06-05 15:44:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 15:44:05,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:44:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:05,940 INFO L225 Difference]: With dead ends: 72140 [2021-06-05 15:44:05,941 INFO L226 Difference]: Without dead ends: 71943 [2021-06-05 15:44:05,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7253 ImplicationChecksByTransitivity, 3794.7ms TimeCoverageRelationStatistics Valid=2368, Invalid=17938, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 15:44:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71943 states. [2021-06-05 15:44:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71943 to 47146. [2021-06-05 15:44:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47146 states, 47145 states have (on average 2.5532506098207657) internal successors, (120373), 47145 states have internal predecessors, (120373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47146 states to 47146 states and 120373 transitions. [2021-06-05 15:44:06,989 INFO L78 Accepts]: Start accepts. Automaton has 47146 states and 120373 transitions. Word has length 43 [2021-06-05 15:44:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:06,989 INFO L482 AbstractCegarLoop]: Abstraction has 47146 states and 120373 transitions. [2021-06-05 15:44:06,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:44:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 47146 states and 120373 transitions. [2021-06-05 15:44:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:07,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:07,037 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:07,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 15:44:07,238 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash 335639619, now seen corresponding path program 74 times [2021-06-05 15:44:07,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:07,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670102359] [2021-06-05 15:44:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:07,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:07,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670102359] [2021-06-05 15:44:07,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670102359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:07,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903829508] [2021-06-05 15:44:07,478 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:07,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:08,018 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:08,019 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 50 treesize of output 22 [2021-06-05 15:44:08,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:08,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:08,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:08,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:08,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903829508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:08,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:08,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042816983] [2021-06-05 15:44:08,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:08,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:08,087 INFO L87 Difference]: Start difference. First operand 47146 states and 120373 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:44:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:13,019 INFO L93 Difference]: Finished difference Result 74152 states and 188777 transitions. [2021-06-05 15:44:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 15:44:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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 43 [2021-06-05 15:44:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:13,123 INFO L225 Difference]: With dead ends: 74152 [2021-06-05 15:44:13,124 INFO L226 Difference]: Without dead ends: 74010 [2021-06-05 15:44:13,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8025 ImplicationChecksByTransitivity, 3797.1ms TimeCoverageRelationStatistics Valid=2577, Invalid=19475, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 15:44:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74010 states. [2021-06-05 15:44:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74010 to 47166. [2021-06-05 15:44:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47166 states, 47165 states have (on average 2.5532280292589844) internal successors, (120423), 47165 states have internal predecessors, (120423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47166 states to 47166 states and 120423 transitions. [2021-06-05 15:44:14,016 INFO L78 Accepts]: Start accepts. Automaton has 47166 states and 120423 transitions. Word has length 43 [2021-06-05 15:44:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:14,017 INFO L482 AbstractCegarLoop]: Abstraction has 47166 states and 120423 transitions. [2021-06-05 15:44:14,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) 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) [2021-06-05 15:44:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 47166 states and 120423 transitions. [2021-06-05 15:44:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:14,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:14,275 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:14,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 15:44:14,489 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1122185933, now seen corresponding path program 75 times [2021-06-05 15:44:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:14,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052094300] [2021-06-05 15:44:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052094300] [2021-06-05 15:44:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052094300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987184361] [2021-06-05 15:44:14,731 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:14,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:44:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:14,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:15,291 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:15,291 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 50 treesize of output 22 [2021-06-05 15:44:15,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:15,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:15,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987184361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:15,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:15,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427992993] [2021-06-05 15:44:15,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:15,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:15,374 INFO L87 Difference]: Start difference. First operand 47166 states and 120423 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:15,847 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-06-05 15:44:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:20,160 INFO L93 Difference]: Finished difference Result 63023 states and 160770 transitions. [2021-06-05 15:44:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 15:44:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:44:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:20,244 INFO L225 Difference]: With dead ends: 63023 [2021-06-05 15:44:20,244 INFO L226 Difference]: Without dead ends: 62729 [2021-06-05 15:44:20,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8120 ImplicationChecksByTransitivity, 3777.1ms TimeCoverageRelationStatistics Valid=2461, Invalid=19591, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 15:44:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62729 states. [2021-06-05 15:44:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62729 to 47330. [2021-06-05 15:44:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47330 states, 47329 states have (on average 2.5527900441589724) internal successors, (120821), 47329 states have internal predecessors, (120821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47330 states to 47330 states and 120821 transitions. [2021-06-05 15:44:21,240 INFO L78 Accepts]: Start accepts. Automaton has 47330 states and 120821 transitions. Word has length 43 [2021-06-05 15:44:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:21,240 INFO L482 AbstractCegarLoop]: Abstraction has 47330 states and 120821 transitions. [2021-06-05 15:44:21,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 47330 states and 120821 transitions. [2021-06-05 15:44:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:21,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:21,292 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:21,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:21,492 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1278458927, now seen corresponding path program 76 times [2021-06-05 15:44:21,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:21,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786639572] [2021-06-05 15:44:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:21,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:21,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786639572] [2021-06-05 15:44:21,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786639572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841986400] [2021-06-05 15:44:21,741 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:21,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:21,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:21,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:22,282 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:22,282 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 50 treesize of output 22 [2021-06-05 15:44:22,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:22,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841986400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:22,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:22,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530974174] [2021-06-05 15:44:22,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:22,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:22,351 INFO L87 Difference]: Start difference. First operand 47330 states and 120821 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:26,869 INFO L93 Difference]: Finished difference Result 64330 states and 163895 transitions. [2021-06-05 15:44:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 15:44:26,869 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:44:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:26,958 INFO L225 Difference]: With dead ends: 64330 [2021-06-05 15:44:26,958 INFO L226 Difference]: Without dead ends: 64041 [2021-06-05 15:44:26,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7628 ImplicationChecksByTransitivity, 3692.8ms TimeCoverageRelationStatistics Valid=2403, Invalid=18477, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 15:44:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64041 states. [2021-06-05 15:44:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64041 to 47290. [2021-06-05 15:44:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47290 states, 47289 states have (on average 2.5528346972868956) internal successors, (120721), 47289 states have internal predecessors, (120721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47290 states to 47290 states and 120721 transitions. [2021-06-05 15:44:27,836 INFO L78 Accepts]: Start accepts. Automaton has 47290 states and 120721 transitions. Word has length 43 [2021-06-05 15:44:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:27,836 INFO L482 AbstractCegarLoop]: Abstraction has 47290 states and 120721 transitions. [2021-06-05 15:44:27,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 47290 states and 120721 transitions. [2021-06-05 15:44:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:27,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:27,884 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:28,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 15:44:28,084 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 191955835, now seen corresponding path program 77 times [2021-06-05 15:44:28,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:28,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267896814] [2021-06-05 15:44:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:28,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:28,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267896814] [2021-06-05 15:44:28,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267896814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:28,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291961492] [2021-06-05 15:44:28,331 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:28,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:44:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:28,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:29,040 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:29,040 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 50 treesize of output 22 [2021-06-05 15:44:29,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:29,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291961492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:29,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:29,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:29,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916464549] [2021-06-05 15:44:29,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:29,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:29,109 INFO L87 Difference]: Start difference. First operand 47290 states and 120721 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:30,578 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-06-05 15:44:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:34,021 INFO L93 Difference]: Finished difference Result 65796 states and 167500 transitions. [2021-06-05 15:44:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 15:44:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:44:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:34,119 INFO L225 Difference]: With dead ends: 65796 [2021-06-05 15:44:34,119 INFO L226 Difference]: Without dead ends: 65562 [2021-06-05 15:44:34,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 4022.8ms TimeCoverageRelationStatistics Valid=2614, Invalid=20036, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:44:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65562 states. [2021-06-05 15:44:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65562 to 47298. [2021-06-05 15:44:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47298 states, 47297 states have (on average 2.5528257606190667) internal successors, (120741), 47297 states have internal predecessors, (120741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47298 states to 47298 states and 120741 transitions. [2021-06-05 15:44:34,991 INFO L78 Accepts]: Start accepts. Automaton has 47298 states and 120741 transitions. Word has length 43 [2021-06-05 15:44:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:34,992 INFO L482 AbstractCegarLoop]: Abstraction has 47298 states and 120741 transitions. [2021-06-05 15:44:34,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 47298 states and 120741 transitions. [2021-06-05 15:44:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:35,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:35,178 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:35,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 15:44:35,393 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2025140471, now seen corresponding path program 78 times [2021-06-05 15:44:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:35,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977079448] [2021-06-05 15:44:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:35,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:35,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977079448] [2021-06-05 15:44:35,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977079448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:35,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251627491] [2021-06-05 15:44:35,641 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:35,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:44:35,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:35,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:36,186 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:36,187 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 50 treesize of output 22 [2021-06-05 15:44:36,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:36,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251627491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:36,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:36,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:36,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608829996] [2021-06-05 15:44:36,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:36,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:36,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:36,256 INFO L87 Difference]: Start difference. First operand 47298 states and 120741 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:41,529 INFO L93 Difference]: Finished difference Result 61026 states and 155120 transitions. [2021-06-05 15:44:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 15:44:41,529 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:44:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:41,609 INFO L225 Difference]: With dead ends: 61026 [2021-06-05 15:44:41,609 INFO L226 Difference]: Without dead ends: 60852 [2021-06-05 15:44:41,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10710 ImplicationChecksByTransitivity, 4439.8ms TimeCoverageRelationStatistics Valid=3227, Invalid=24829, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 15:44:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60852 states. [2021-06-05 15:44:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60852 to 47304. [2021-06-05 15:44:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47304 states, 47303 states have (on average 2.5528190601018963) internal successors, (120756), 47303 states have internal predecessors, (120756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47304 states to 47304 states and 120756 transitions. [2021-06-05 15:44:42,384 INFO L78 Accepts]: Start accepts. Automaton has 47304 states and 120756 transitions. Word has length 43 [2021-06-05 15:44:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:42,384 INFO L482 AbstractCegarLoop]: Abstraction has 47304 states and 120756 transitions. [2021-06-05 15:44:42,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 47304 states and 120756 transitions. [2021-06-05 15:44:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:42,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:42,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:42,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 15:44:42,636 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2141102477, now seen corresponding path program 79 times [2021-06-05 15:44:42,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:42,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110963523] [2021-06-05 15:44:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:42,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:42,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110963523] [2021-06-05 15:44:42,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110963523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:42,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451468565] [2021-06-05 15:44:42,969 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:42,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:43,528 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 15:44:43,615 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:44:43,615 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 50 treesize of output 22 [2021-06-05 15:44:43,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:44:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:43,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451468565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:43,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:43,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:43,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915994588] [2021-06-05 15:44:43,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:43,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:43,684 INFO L87 Difference]: Start difference. First operand 47304 states and 120756 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:47,777 INFO L93 Difference]: Finished difference Result 56783 states and 144456 transitions. [2021-06-05 15:44:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 15:44:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:44:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:47,851 INFO L225 Difference]: With dead ends: 56783 [2021-06-05 15:44:47,851 INFO L226 Difference]: Without dead ends: 56701 [2021-06-05 15:44:47,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7607 ImplicationChecksByTransitivity, 3811.9ms TimeCoverageRelationStatistics Valid=2455, Invalid=18137, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 15:44:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56701 states. [2021-06-05 15:44:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56701 to 47304. [2021-06-05 15:44:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47304 states, 47303 states have (on average 2.5528190601018963) internal successors, (120756), 47303 states have internal predecessors, (120756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47304 states to 47304 states and 120756 transitions. [2021-06-05 15:44:48,659 INFO L78 Accepts]: Start accepts. Automaton has 47304 states and 120756 transitions. Word has length 43 [2021-06-05 15:44:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 47304 states and 120756 transitions. [2021-06-05 15:44:48,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 47304 states and 120756 transitions. [2021-06-05 15:44:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:44:48,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:48,708 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:48,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:48,909 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash -610205491, now seen corresponding path program 80 times [2021-06-05 15:44:48,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:48,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732166340] [2021-06-05 15:44:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:49,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:49,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732166340] [2021-06-05 15:44:49,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732166340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:49,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797352568] [2021-06-05 15:44:49,165 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:49,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:49,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:49,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,930 INFO L244 Elim1Store]: Index analysis took 124 ms [2021-06-05 15:44:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 15:44:49,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:49,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 15:44:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:50,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797352568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:50,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:50,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:44:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688507156] [2021-06-05 15:44:50,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:44:50,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:50,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:44:50,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:50,011 INFO L87 Difference]: Start difference. First operand 47304 states and 120756 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:44:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:59,947 INFO L93 Difference]: Finished difference Result 70608 states and 179724 transitions. [2021-06-05 15:44:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 15:44:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:44:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:00,123 INFO L225 Difference]: With dead ends: 70608 [2021-06-05 15:45:00,123 INFO L226 Difference]: Without dead ends: 69991 [2021-06-05 15:45:00,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19698 ImplicationChecksByTransitivity, 7019.3ms TimeCoverageRelationStatistics Valid=5051, Invalid=44901, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 15:45:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69991 states. [2021-06-05 15:45:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69991 to 47428. [2021-06-05 15:45:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47428 states, 47427 states have (on average 2.5528918126805404) internal successors, (121076), 47427 states have internal predecessors, (121076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47428 states to 47428 states and 121076 transitions. [2021-06-05 15:45:01,077 INFO L78 Accepts]: Start accepts. Automaton has 47428 states and 121076 transitions. Word has length 43 [2021-06-05 15:45:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 47428 states and 121076 transitions. [2021-06-05 15:45:01,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:45:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 47428 states and 121076 transitions. [2021-06-05 15:45:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:45:01,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:01,124 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:01,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 15:45:01,325 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2146818217, now seen corresponding path program 81 times [2021-06-05 15:45:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122640018] [2021-06-05 15:45:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:01,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122640018] [2021-06-05 15:45:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122640018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610735952] [2021-06-05 15:45:01,607 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:01,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:45:01,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:02,221 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:45:02,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 15:45:02,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:02,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:02,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:02,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:45:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610735952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:02,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:02,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:45:02,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036547707] [2021-06-05 15:45:02,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:45:02,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:45:02,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:45:02,290 INFO L87 Difference]: Start difference. First operand 47428 states and 121076 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:45:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:10,230 INFO L93 Difference]: Finished difference Result 69796 states and 177489 transitions. [2021-06-05 15:45:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-05 15:45:10,230 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 43 [2021-06-05 15:45:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:10,389 INFO L225 Difference]: With dead ends: 69796 [2021-06-05 15:45:10,390 INFO L226 Difference]: Without dead ends: 69406 [2021-06-05 15:45:10,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21210 ImplicationChecksByTransitivity, 6808.6ms TimeCoverageRelationStatistics Valid=5217, Invalid=46995, Unknown=0, NotChecked=0, Total=52212 [2021-06-05 15:45:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69406 states. [2021-06-05 15:45:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69406 to 47466. [2021-06-05 15:45:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47466 states, 47465 states have (on average 2.552933740651006) internal successors, (121175), 47465 states have internal predecessors, (121175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47466 states to 47466 states and 121175 transitions. [2021-06-05 15:45:11,303 INFO L78 Accepts]: Start accepts. Automaton has 47466 states and 121175 transitions. Word has length 43 [2021-06-05 15:45:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:11,303 INFO L482 AbstractCegarLoop]: Abstraction has 47466 states and 121175 transitions. [2021-06-05 15:45:11,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:45:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 47466 states and 121175 transitions. [2021-06-05 15:45:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:45:11,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:11,352 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:11,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:11,553 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -314964443, now seen corresponding path program 82 times [2021-06-05 15:45:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:11,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689117730] [2021-06-05 15:45:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:11,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689117730] [2021-06-05 15:45:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689117730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332496583] [2021-06-05 15:45:11,782 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:11,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:11,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:11,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:12,322 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:45:12,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 15:45:12,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:12,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:12,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:12,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:45:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332496583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:12,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:12,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:45:12,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460720414] [2021-06-05 15:45:12,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:45:12,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:45:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:45:12,389 INFO L87 Difference]: Start difference. First operand 47466 states and 121175 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:45:13,678 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-06-05 15:45:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:19,625 INFO L93 Difference]: Finished difference Result 67405 states and 171230 transitions. [2021-06-05 15:45:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-05 15:45:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 43 [2021-06-05 15:45:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:19,717 INFO L225 Difference]: With dead ends: 67405 [2021-06-05 15:45:19,717 INFO L226 Difference]: Without dead ends: 67187 [2021-06-05 15:45:19,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21733 ImplicationChecksByTransitivity, 6125.1ms TimeCoverageRelationStatistics Valid=5437, Invalid=46775, Unknown=0, NotChecked=0, Total=52212 [2021-06-05 15:45:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67187 states. [2021-06-05 15:45:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67187 to 47470. [2021-06-05 15:45:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47470 states, 47469 states have (on average 2.552887147401462) internal successors, (121183), 47469 states have internal predecessors, (121183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47470 states to 47470 states and 121183 transitions. [2021-06-05 15:45:20,569 INFO L78 Accepts]: Start accepts. Automaton has 47470 states and 121183 transitions. Word has length 43 [2021-06-05 15:45:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:20,569 INFO L482 AbstractCegarLoop]: Abstraction has 47470 states and 121183 transitions. [2021-06-05 15:45:20,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:45:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 47470 states and 121183 transitions. [2021-06-05 15:45:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:45:20,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:20,618 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:20,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:20,818 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1363490135, now seen corresponding path program 83 times [2021-06-05 15:45:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:20,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478789791] [2021-06-05 15:45:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:45:21,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478789791] [2021-06-05 15:45:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478789791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254768435] [2021-06-05 15:45:21,056 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:21,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:45:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:21,343 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 15:45:21,797 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:45:21,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 15:45:21,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:21,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:45:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:21,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254768435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:21,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:21,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:45:21,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817996824] [2021-06-05 15:45:21,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:45:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:45:21,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:45:21,865 INFO L87 Difference]: Start difference. First operand 47470 states and 121183 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:45:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:31,498 INFO L93 Difference]: Finished difference Result 85613 states and 217148 transitions. [2021-06-05 15:45:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2021-06-05 15:45:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 43 [2021-06-05 15:45:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:31,605 INFO L225 Difference]: With dead ends: 85613 [2021-06-05 15:45:31,605 INFO L226 Difference]: Without dead ends: 85251 [2021-06-05 15:45:31,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32674 ImplicationChecksByTransitivity, 7610.3ms TimeCoverageRelationStatistics Valid=7362, Invalid=68538, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 15:45:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85251 states. [2021-06-05 15:45:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85251 to 51758. [2021-06-05 15:45:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51758 states, 51757 states have (on average 2.551461638039299) internal successors, (132056), 51757 states have internal predecessors, (132056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51758 states to 51758 states and 132056 transitions. [2021-06-05 15:45:32,714 INFO L78 Accepts]: Start accepts. Automaton has 51758 states and 132056 transitions. Word has length 43 [2021-06-05 15:45:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:32,714 INFO L482 AbstractCegarLoop]: Abstraction has 51758 states and 132056 transitions. [2021-06-05 15:45:32,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:45:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 51758 states and 132056 transitions. [2021-06-05 15:45:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:45:32,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:32,769 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:32,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 15:45:32,970 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash -663449007, now seen corresponding path program 84 times [2021-06-05 15:45:32,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:32,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924222531] [2021-06-05 15:45:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:45:33,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924222531] [2021-06-05 15:45:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924222531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349100880] [2021-06-05 15:45:33,199 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:33,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:45:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:33,782 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:45:33,782 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 50 treesize of output 22 [2021-06-05 15:45:33,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:33,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:45:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:33,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349100880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:33,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:33,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:45:33,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893373263] [2021-06-05 15:45:33,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:45:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:45:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:45:33,852 INFO L87 Difference]: Start difference. First operand 51758 states and 132056 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:45:35,214 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-06-05 15:45:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:40,339 INFO L93 Difference]: Finished difference Result 77822 states and 198068 transitions. [2021-06-05 15:45:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 15:45:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:45:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:40,451 INFO L225 Difference]: With dead ends: 77822 [2021-06-05 15:45:40,451 INFO L226 Difference]: Without dead ends: 77358 [2021-06-05 15:45:40,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12809 ImplicationChecksByTransitivity, 4769.2ms TimeCoverageRelationStatistics Valid=3379, Invalid=29927, Unknown=0, NotChecked=0, Total=33306 [2021-06-05 15:45:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77358 states. [2021-06-05 15:45:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77358 to 51884. [2021-06-05 15:45:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51884 states, 51883 states have (on average 2.5517221440548927) internal successors, (132391), 51883 states have internal predecessors, (132391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51884 states to 51884 states and 132391 transitions. [2021-06-05 15:45:41,512 INFO L78 Accepts]: Start accepts. Automaton has 51884 states and 132391 transitions. Word has length 43 [2021-06-05 15:45:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:41,512 INFO L482 AbstractCegarLoop]: Abstraction has 51884 states and 132391 transitions. [2021-06-05 15:45:41,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:45:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 51884 states and 132391 transitions. [2021-06-05 15:45:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:45:41,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:41,562 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:41,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:45:41,762 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash 806965755, now seen corresponding path program 85 times [2021-06-05 15:45:41,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:41,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671147798] [2021-06-05 15:45:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:45:41,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:41,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671147798] [2021-06-05 15:45:41,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671147798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:41,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655753676] [2021-06-05 15:45:41,990 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:42,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:42,560 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:45:42,560 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 50 treesize of output 22 [2021-06-05 15:45:42,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:42,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:42,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:42,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:45:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:42,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655753676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:42,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:42,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:45:42,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006122100] [2021-06-05 15:45:42,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:45:42,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:42,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:45:42,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:45:42,631 INFO L87 Difference]: Start difference. First operand 51884 states and 132391 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:45:42,889 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 15:45:44,688 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-06-05 15:45:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:50,103 INFO L93 Difference]: Finished difference Result 75873 states and 192774 transitions. [2021-06-05 15:45:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-06-05 15:45:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:45:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:50,200 INFO L225 Difference]: With dead ends: 75873 [2021-06-05 15:45:50,200 INFO L226 Difference]: Without dead ends: 75565 [2021-06-05 15:45:50,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17790 ImplicationChecksByTransitivity, 6114.0ms TimeCoverageRelationStatistics Valid=4551, Invalid=40181, Unknown=0, NotChecked=0, Total=44732 [2021-06-05 15:45:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75565 states. [2021-06-05 15:45:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75565 to 51854. [2021-06-05 15:45:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51854 states, 51853 states have (on average 2.551250650878445) internal successors, (132290), 51853 states have internal predecessors, (132290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51854 states to 51854 states and 132290 transitions. [2021-06-05 15:45:51,114 INFO L78 Accepts]: Start accepts. Automaton has 51854 states and 132290 transitions. Word has length 43 [2021-06-05 15:45:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:51,114 INFO L482 AbstractCegarLoop]: Abstraction has 51854 states and 132290 transitions. [2021-06-05 15:45:51,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:45:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 51854 states and 132290 transitions. [2021-06-05 15:45:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:45:51,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:51,163 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:51,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:51,364 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1654816905, now seen corresponding path program 86 times [2021-06-05 15:45:51,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:51,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274230748] [2021-06-05 15:45:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:45:51,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:51,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274230748] [2021-06-05 15:45:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274230748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:51,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498608295] [2021-06-05 15:45:51,633 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:51,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:51,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:52,231 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:45:52,231 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 50 treesize of output 22 [2021-06-05 15:45:52,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:45:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:52,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498608295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:52,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:52,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:45:52,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507333679] [2021-06-05 15:45:52,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:45:52,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:45:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:45:52,300 INFO L87 Difference]: Start difference. First operand 51854 states and 132290 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:45:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:59,173 INFO L93 Difference]: Finished difference Result 74637 states and 189395 transitions. [2021-06-05 15:45:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-06-05 15:45:59,174 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:45:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:59,279 INFO L225 Difference]: With dead ends: 74637 [2021-06-05 15:45:59,279 INFO L226 Difference]: Without dead ends: 74393 [2021-06-05 15:45:59,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16287 ImplicationChecksByTransitivity, 5955.0ms TimeCoverageRelationStatistics Valid=4561, Invalid=36445, Unknown=0, NotChecked=0, Total=41006 [2021-06-05 15:45:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74393 states. [2021-06-05 15:46:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74393 to 51872. [2021-06-05 15:46:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51872 states, 51871 states have (on average 2.551232866148715) internal successors, (132335), 51871 states have internal predecessors, (132335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51872 states to 51872 states and 132335 transitions. [2021-06-05 15:46:00,234 INFO L78 Accepts]: Start accepts. Automaton has 51872 states and 132335 transitions. Word has length 43 [2021-06-05 15:46:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:00,234 INFO L482 AbstractCegarLoop]: Abstraction has 51872 states and 132335 transitions. [2021-06-05 15:46:00,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 51872 states and 132335 transitions. [2021-06-05 15:46:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:46:00,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:00,286 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:00,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:00,489 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -252245953, now seen corresponding path program 87 times [2021-06-05 15:46:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:00,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382238975] [2021-06-05 15:46:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382238975] [2021-06-05 15:46:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382238975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855035559] [2021-06-05 15:46:00,733 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:00,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:46:00,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:00,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:00,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:01,268 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:46:01,268 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 50 treesize of output 22 [2021-06-05 15:46:01,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:46:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:01,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855035559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:01,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:01,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:46:01,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001394550] [2021-06-05 15:46:01,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:46:01,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:01,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:46:01,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:01,534 INFO L87 Difference]: Start difference. First operand 51872 states and 132335 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:46:03,203 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 15:46:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:07,230 INFO L93 Difference]: Finished difference Result 69212 states and 175696 transitions. [2021-06-05 15:46:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 15:46:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 43 [2021-06-05 15:46:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:07,332 INFO L225 Difference]: With dead ends: 69212 [2021-06-05 15:46:07,332 INFO L226 Difference]: Without dead ends: 69130 [2021-06-05 15:46:07,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12857 ImplicationChecksByTransitivity, 4678.5ms TimeCoverageRelationStatistics Valid=3678, Invalid=28542, Unknown=0, NotChecked=0, Total=32220 [2021-06-05 15:46:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69130 states. [2021-06-05 15:46:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69130 to 51878. [2021-06-05 15:46:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51878 states, 51877 states have (on average 2.551226940648071) internal successors, (132350), 51877 states have internal predecessors, (132350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51878 states to 51878 states and 132350 transitions. [2021-06-05 15:46:08,327 INFO L78 Accepts]: Start accepts. Automaton has 51878 states and 132350 transitions. Word has length 43 [2021-06-05 15:46:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:08,327 INFO L482 AbstractCegarLoop]: Abstraction has 51878 states and 132350 transitions. [2021-06-05 15:46:08,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:46:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 51878 states and 132350 transitions. [2021-06-05 15:46:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:46:08,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:08,377 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:08,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 15:46:08,578 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1416733651, now seen corresponding path program 88 times [2021-06-05 15:46:08,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:08,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98105944] [2021-06-05 15:46:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:46:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98105944] [2021-06-05 15:46:08,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98105944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2358082] [2021-06-05 15:46:08,898 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:08,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:08,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:09,467 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:46:09,467 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 50 treesize of output 22 [2021-06-05 15:46:09,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:09,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:09,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:09,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:46:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:09,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2358082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:09,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:09,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:46:09,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50579195] [2021-06-05 15:46:09,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:46:09,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:46:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:09,537 INFO L87 Difference]: Start difference. First operand 51878 states and 132350 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:46:10,165 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-06-05 15:46:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:18,639 INFO L93 Difference]: Finished difference Result 89690 states and 227050 transitions. [2021-06-05 15:46:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-05 15:46:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 43 [2021-06-05 15:46:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:18,772 INFO L225 Difference]: With dead ends: 89690 [2021-06-05 15:46:18,773 INFO L226 Difference]: Without dead ends: 89290 [2021-06-05 15:46:18,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26996 ImplicationChecksByTransitivity, 7579.3ms TimeCoverageRelationStatistics Valid=6679, Invalid=58091, Unknown=0, NotChecked=0, Total=64770 [2021-06-05 15:46:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89290 states. [2021-06-05 15:46:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89290 to 54716. [2021-06-05 15:46:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54716 states, 54715 states have (on average 2.5474184410125194) internal successors, (139382), 54715 states have internal predecessors, (139382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54716 states to 54716 states and 139382 transitions. [2021-06-05 15:46:19,907 INFO L78 Accepts]: Start accepts. Automaton has 54716 states and 139382 transitions. Word has length 43 [2021-06-05 15:46:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:19,907 INFO L482 AbstractCegarLoop]: Abstraction has 54716 states and 139382 transitions. [2021-06-05 15:46:19,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:46:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54716 states and 139382 transitions. [2021-06-05 15:46:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:46:20,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:20,174 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:20,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:20,387 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash -368011059, now seen corresponding path program 89 times [2021-06-05 15:46:20,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:20,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644074112] [2021-06-05 15:46:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:46:20,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644074112] [2021-06-05 15:46:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644074112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405714886] [2021-06-05 15:46:20,659 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:20,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:46:20,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:21,226 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:46:21,226 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 50 treesize of output 22 [2021-06-05 15:46:21,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:21,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:46:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:21,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405714886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:21,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:21,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:46:21,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600859373] [2021-06-05 15:46:21,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:21,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:21,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:21,299 INFO L87 Difference]: Start difference. First operand 54716 states and 139382 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:21,917 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-06-05 15:46:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:26,549 INFO L93 Difference]: Finished difference Result 84710 states and 215092 transitions. [2021-06-05 15:46:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 15:46:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:46:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:26,667 INFO L225 Difference]: With dead ends: 84710 [2021-06-05 15:46:26,668 INFO L226 Difference]: Without dead ends: 84396 [2021-06-05 15:46:26,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 4412.1ms TimeCoverageRelationStatistics Valid=3092, Invalid=21088, Unknown=0, NotChecked=0, Total=24180 [2021-06-05 15:46:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84396 states. [2021-06-05 15:46:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84396 to 55026. [2021-06-05 15:46:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55026 states, 55025 states have (on average 2.5467878237164925) internal successors, (140137), 55025 states have internal predecessors, (140137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55026 states to 55026 states and 140137 transitions. [2021-06-05 15:46:27,923 INFO L78 Accepts]: Start accepts. Automaton has 55026 states and 140137 transitions. Word has length 43 [2021-06-05 15:46:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:27,923 INFO L482 AbstractCegarLoop]: Abstraction has 55026 states and 140137 transitions. [2021-06-05 15:46:27,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 55026 states and 140137 transitions. [2021-06-05 15:46:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:46:27,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:27,992 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:28,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:28,193 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1102403703, now seen corresponding path program 90 times [2021-06-05 15:46:28,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:28,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384927846] [2021-06-05 15:46:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:46:28,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:28,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384927846] [2021-06-05 15:46:28,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384927846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:28,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268051621] [2021-06-05 15:46:28,429 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:28,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:46:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:29,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 15:46:29,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:29,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 15:46:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268051621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:29,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:29,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:46:29,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071928919] [2021-06-05 15:46:29,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:29,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:29,149 INFO L87 Difference]: Start difference. First operand 55026 states and 140137 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:29,407 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-06-05 15:46:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:36,066 INFO L93 Difference]: Finished difference Result 96340 states and 244151 transitions. [2021-06-05 15:46:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 15:46:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:46:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:36,193 INFO L225 Difference]: With dead ends: 96340 [2021-06-05 15:46:36,193 INFO L226 Difference]: Without dead ends: 95949 [2021-06-05 15:46:36,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10517 ImplicationChecksByTransitivity, 5410.7ms TimeCoverageRelationStatistics Valid=3570, Invalid=24822, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 15:46:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95949 states. [2021-06-05 15:46:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95949 to 54740. [2021-06-05 15:46:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54740 states, 54739 states have (on average 2.5474341876906776) internal successors, (139444), 54739 states have internal predecessors, (139444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54740 states to 54740 states and 139444 transitions. [2021-06-05 15:46:37,348 INFO L78 Accepts]: Start accepts. Automaton has 54740 states and 139444 transitions. Word has length 43 [2021-06-05 15:46:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:37,348 INFO L482 AbstractCegarLoop]: Abstraction has 54740 states and 139444 transitions. [2021-06-05 15:46:37,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 54740 states and 139444 transitions. [2021-06-05 15:46:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:46:37,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:37,415 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:37,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:37,615 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash -72770011, now seen corresponding path program 91 times [2021-06-05 15:46:37,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:37,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461585721] [2021-06-05 15:46:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:37,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461585721] [2021-06-05 15:46:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461585721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016576662] [2021-06-05 15:46:37,846 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:37,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:38,438 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 15:46:38,588 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:46:38,589 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 50 treesize of output 22 [2021-06-05 15:46:38,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:38,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:38,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:38,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:46:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:38,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016576662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:38,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:38,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 15:46:38,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654553453] [2021-06-05 15:46:38,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:46:38,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:46:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:38,655 INFO L87 Difference]: Start difference. First operand 54740 states and 139444 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:46:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:44,498 INFO L93 Difference]: Finished difference Result 76775 states and 194999 transitions. [2021-06-05 15:46:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 15:46:44,499 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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 43 [2021-06-05 15:46:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:44,602 INFO L225 Difference]: With dead ends: 76775 [2021-06-05 15:46:44,602 INFO L226 Difference]: Without dead ends: 76634 [2021-06-05 15:46:44,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10333 ImplicationChecksByTransitivity, 5192.9ms TimeCoverageRelationStatistics Valid=3895, Invalid=23495, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 15:46:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76634 states. [2021-06-05 15:46:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76634 to 54504. [2021-06-05 15:46:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54504 states, 54503 states have (on average 2.5480248793644384) internal successors, (138875), 54503 states have internal predecessors, (138875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54504 states to 54504 states and 138875 transitions. [2021-06-05 15:46:45,573 INFO L78 Accepts]: Start accepts. Automaton has 54504 states and 138875 transitions. Word has length 43 [2021-06-05 15:46:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:45,573 INFO L482 AbstractCegarLoop]: Abstraction has 54504 states and 138875 transitions. [2021-06-05 15:46:45,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 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) [2021-06-05 15:46:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 54504 states and 138875 transitions. [2021-06-05 15:46:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:46:45,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:45,639 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:45,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 15:46:45,840 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1929336973, now seen corresponding path program 92 times [2021-06-05 15:46:45,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:45,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795461794] [2021-06-05 15:46:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:46:46,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:46,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795461794] [2021-06-05 15:46:46,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795461794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:46,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880900208] [2021-06-05 15:46:46,117 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:46,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:46,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:46,464 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 15:46:46,869 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:46:46,870 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 50 treesize of output 22 [2021-06-05 15:46:46,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:46,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:46,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:46,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:46:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880900208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:46,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:46,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 15:46:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021650680] [2021-06-05 15:46:46,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:46,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:46,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:46,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:46,937 INFO L87 Difference]: Start difference. First operand 54504 states and 138875 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:48,180 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-06-05 15:46:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:51,280 INFO L93 Difference]: Finished difference Result 67173 states and 170272 transitions. [2021-06-05 15:46:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 15:46:51,280 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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 43 [2021-06-05 15:46:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:51,370 INFO L225 Difference]: With dead ends: 67173 [2021-06-05 15:46:51,370 INFO L226 Difference]: Without dead ends: 66985 [2021-06-05 15:46:51,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7191 ImplicationChecksByTransitivity, 3878.8ms TimeCoverageRelationStatistics Valid=2722, Invalid=17018, Unknown=0, NotChecked=0, Total=19740 [2021-06-05 15:46:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66985 states. [2021-06-05 15:46:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66985 to 54678. [2021-06-05 15:46:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54678 states, 54677 states have (on average 2.547177057995135) internal successors, (139272), 54677 states have internal predecessors, (139272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54678 states to 54678 states and 139272 transitions. [2021-06-05 15:46:52,379 INFO L78 Accepts]: Start accepts. Automaton has 54678 states and 139272 transitions. Word has length 43 [2021-06-05 15:46:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:52,379 INFO L482 AbstractCegarLoop]: Abstraction has 54678 states and 139272 transitions. [2021-06-05 15:46:52,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) 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) [2021-06-05 15:46:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54678 states and 139272 transitions. [2021-06-05 15:46:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 15:46:52,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:52,448 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:52,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:52,649 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:52,650 INFO L82 PathProgramCache]: Analyzing trace with hash -751237152, now seen corresponding path program 93 times [2021-06-05 15:46:52,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:52,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470537702] [2021-06-05 15:46:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:52,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:52,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470537702] [2021-06-05 15:46:52,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470537702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:52,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251417171] [2021-06-05 15:46:52,677 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:52,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:46:52,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:46:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:52,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251417171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:52,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:52,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:46:52,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153486783] [2021-06-05 15:46:52,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:46:52,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:46:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:46:52,761 INFO L87 Difference]: Start difference. First operand 54678 states and 139272 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:52,910 INFO L93 Difference]: Finished difference Result 55712 states and 141736 transitions. [2021-06-05 15:46:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:46:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 15:46:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:52,985 INFO L225 Difference]: With dead ends: 55712 [2021-06-05 15:46:52,985 INFO L226 Difference]: Without dead ends: 55625 [2021-06-05 15:46:52,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:46:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55625 states. [2021-06-05 15:46:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55625 to 54869. [2021-06-05 15:46:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54869 states, 54868 states have (on average 2.547167748049865) internal successors, (139758), 54868 states have internal predecessors, (139758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54869 states to 54869 states and 139758 transitions. [2021-06-05 15:46:54,140 INFO L78 Accepts]: Start accepts. Automaton has 54869 states and 139758 transitions. Word has length 46 [2021-06-05 15:46:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:54,140 INFO L482 AbstractCegarLoop]: Abstraction has 54869 states and 139758 transitions. [2021-06-05 15:46:54,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 54869 states and 139758 transitions. [2021-06-05 15:46:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:46:54,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:54,211 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:54,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:54,411 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:54,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1620698612, now seen corresponding path program 94 times [2021-06-05 15:46:54,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:54,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954947232] [2021-06-05 15:46:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:54,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:54,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954947232] [2021-06-05 15:46:54,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954947232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:54,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799807142] [2021-06-05 15:46:54,870 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:54,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:54,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:46:54,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:55,859 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 15:46:55,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-06-05 15:46:55,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:55,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:55,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:55,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:10 [2021-06-05 15:46:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:55,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799807142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:55,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:55,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-06-05 15:46:55,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963802729] [2021-06-05 15:46:55,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:46:55,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:55,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:46:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:46:55,946 INFO L87 Difference]: Start difference. First operand 54869 states and 139758 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:04,884 INFO L93 Difference]: Finished difference Result 79251 states and 201727 transitions. [2021-06-05 15:47:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 15:47:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:47:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:04,988 INFO L225 Difference]: With dead ends: 79251 [2021-06-05 15:47:04,988 INFO L226 Difference]: Without dead ends: 77743 [2021-06-05 15:47:04,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12439 ImplicationChecksByTransitivity, 7008.7ms TimeCoverageRelationStatistics Valid=4504, Invalid=31406, Unknown=0, NotChecked=0, Total=35910 [2021-06-05 15:47:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77743 states. [2021-06-05 15:47:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77743 to 55624. [2021-06-05 15:47:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55624 states, 55623 states have (on average 2.5484421911799076) internal successors, (141752), 55623 states have internal predecessors, (141752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55624 states to 55624 states and 141752 transitions. [2021-06-05 15:47:06,011 INFO L78 Accepts]: Start accepts. Automaton has 55624 states and 141752 transitions. Word has length 49 [2021-06-05 15:47:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:06,011 INFO L482 AbstractCegarLoop]: Abstraction has 55624 states and 141752 transitions. [2021-06-05 15:47:06,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 55624 states and 141752 transitions. [2021-06-05 15:47:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:47:06,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:06,233 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:06,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:06,433 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:06,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1861791562, now seen corresponding path program 95 times [2021-06-05 15:47:06,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:06,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048011960] [2021-06-05 15:47:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:06,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048011960] [2021-06-05 15:47:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048011960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699730098] [2021-06-05 15:47:06,851 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:06,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:47:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:47:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:07,704 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 15:47:07,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-06-05 15:47:07,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:07,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:07,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:07,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:10 [2021-06-05 15:47:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:07,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699730098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:07,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:07,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-06-05 15:47:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681283392] [2021-06-05 15:47:07,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:47:07,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:07,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:47:07,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:47:07,793 INFO L87 Difference]: Start difference. First operand 55624 states and 141752 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:19,745 INFO L93 Difference]: Finished difference Result 83043 states and 211467 transitions. [2021-06-05 15:47:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-06-05 15:47:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:47:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:19,856 INFO L225 Difference]: With dead ends: 83043 [2021-06-05 15:47:19,856 INFO L226 Difference]: Without dead ends: 81631 [2021-06-05 15:47:19,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20657 ImplicationChecksByTransitivity, 9222.3ms TimeCoverageRelationStatistics Valid=6717, Invalid=48743, Unknown=0, NotChecked=0, Total=55460 [2021-06-05 15:47:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81631 states. [2021-06-05 15:47:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81631 to 55732. [2021-06-05 15:47:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55732 states, 55731 states have (on average 2.5483124293481185) internal successors, (142020), 55731 states have internal predecessors, (142020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55732 states to 55732 states and 142020 transitions. [2021-06-05 15:47:21,090 INFO L78 Accepts]: Start accepts. Automaton has 55732 states and 142020 transitions. Word has length 49 [2021-06-05 15:47:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:21,091 INFO L482 AbstractCegarLoop]: Abstraction has 55732 states and 142020 transitions. [2021-06-05 15:47:21,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 55732 states and 142020 transitions. [2021-06-05 15:47:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:47:21,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:21,169 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:21,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:47:21,370 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:21,370 INFO L82 PathProgramCache]: Analyzing trace with hash 787253712, now seen corresponding path program 96 times [2021-06-05 15:47:21,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:21,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368798535] [2021-06-05 15:47:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:21,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:21,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368798535] [2021-06-05 15:47:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368798535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89084203] [2021-06-05 15:47:21,800 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:21,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:47:21,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:47:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 15:47:22,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-05 15:47:22,324 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:47:22,326 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:47:22,327 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:47:22,327 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:47:22 BasicIcfg [2021-06-05 15:47:22,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:47:22,328 INFO L168 Benchmark]: Toolchain (without parser) took 733710.41 ms. Allocated memory was 358.6 MB in the beginning and 9.1 GB in the end (delta: 8.7 GB). Free memory was 337.7 MB in the beginning and 6.5 GB in the end (delta: -6.2 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. [2021-06-05 15:47:22,328 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 358.6 MB. Free memory was 338.9 MB in the beginning and 338.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:47:22,328 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.84 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:47:22,328 INFO L168 Benchmark]: Boogie Preprocessor took 17.19 ms. Allocated memory is still 358.6 MB. Free memory was 336.2 MB in the beginning and 335.2 MB in the end (delta: 947.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:47:22,328 INFO L168 Benchmark]: RCFGBuilder took 325.09 ms. Allocated memory is still 358.6 MB. Free memory was 335.2 MB in the beginning and 322.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 15:47:22,328 INFO L168 Benchmark]: TraceAbstraction took 733332.84 ms. Allocated memory was 358.6 MB in the beginning and 9.1 GB in the end (delta: 8.7 GB). Free memory was 322.2 MB in the beginning and 6.5 GB in the end (delta: -6.2 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-06-05 15:47:22,329 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 0.13 ms. Allocated memory is still 358.6 MB. Free memory was 338.9 MB in the beginning and 338.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.84 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.19 ms. Allocated memory is still 358.6 MB. Free memory was 336.2 MB in the beginning and 335.2 MB in the end (delta: 947.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 325.09 ms. Allocated memory is still 358.6 MB. Free memory was 335.2 MB in the beginning and 322.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 733332.84 ms. Allocated memory was 358.6 MB in the beginning and 9.1 GB in the end (delta: 8.7 GB). Free memory was 322.2 MB in the beginning and 6.5 GB in the end (delta: -6.2 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 733228.6ms, OverallIterations: 99, TraceHistogramMax: 5, EmptinessCheckTime: 3371.5ms, AutomataDifference: 574583.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7958 SDtfs, 59956 SDslu, 148089 SDs, 0 SdLazy, 263545 SolverSat, 26924 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 132175.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17334 GetRequests, 2544 SyntacticMatches, 44 SemanticMatches, 14746 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976627 ImplicationChecksByTransitivity, 455553.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55732occurred in iteration=98, InterpolantAutomatonStates: 11995, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49443.7ms AutomataMinimizationTime, 98 MinimizatonAttempts, 1518638 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 438.4ms SsaConstructionTime, 1492.2ms SatisfiabilityAnalysisTime, 81112.7ms InterpolantComputationTime, 7852 NumberOfCodeBlocks, 7852 NumberOfCodeBlocksAsserted, 404 NumberOfCheckSat, 7659 ConstructedInterpolants, 181 QuantifiedInterpolants, 130149 SizeOfPredicates, 715 NumberOfNonLiveVariables, 9566 ConjunctsInSsa, 2911 ConjunctsInUnsatCore, 193 InterpolantComputations, 3 PerfectInterpolantSequences, 391/7269 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