/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:50:26,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:50:26,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:50:26,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 15:50:27,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 15:50:27,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:50:27,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:50:27,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:50:27,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:50:27,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:50:27,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:50:27,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:50:27,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:50:27,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:50:27,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:50:27,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:50:27,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:50:27,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:50:27,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:50:27,036 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:50:27,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:50:27,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:50:27,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:50:27,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:50:27,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:50:27,412 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:50:27,413 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:50:27,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-05-03 15:50:27,414 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-05-03 15:50:27,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:50:27,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:50:27,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:50:27,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:50:27,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:50:27,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:50:27,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:50:27,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:50:27,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:50:27,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/1) ... [2021-05-03 15:50:27,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:50:27,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:50:27,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:50:27,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:50:27,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (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 [2021-05-03 15:50:27,595 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:50:27,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:50:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:50:27,597 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:50:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:50:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:50:27,597 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:50:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:50:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:50:27,598 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:50:27,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:50:27,904 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 15:50:27,904 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 15:50:27,905 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:50:27 BoogieIcfgContainer [2021-05-03 15:50:27,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:50:27,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:50:27,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:50:27,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:50:27,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:50:27" (1/2) ... [2021-05-03 15:50:27,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84d0f4 and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:50:27, skipping insertion in model container [2021-05-03 15:50:27,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:50:27" (2/2) ... [2021-05-03 15:50:27,913 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-05-03 15:50:27,918 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:50:27,918 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:50:27,934 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:50:27,935 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:50:28,009 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 15:50:28,024 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 15:50:28,056 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:50:28,056 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:50:28,056 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:50:28,056 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:50:28,057 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:50:28,057 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:50:28,057 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:50:28,057 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:50:28,065 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-05-03 15:50:28,092 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) [2021-05-03 15:50:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) [2021-05-03 15:50:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 15:50:28,130 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:28,131 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:28,131 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-05-03 15:50:28,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:28,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179945830] [2021-05-03 15:50:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:28,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179945830] [2021-05-03 15:50:28,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:50:28,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:50:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505821702] [2021-05-03 15:50:28,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 15:50:28,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 15:50:28,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:50:28,351 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:28,381 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-05-03 15:50:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 15:50:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 15:50:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:28,398 INFO L225 Difference]: With dead ends: 42 [2021-05-03 15:50:28,399 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 15:50:28,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:50:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 15:50:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-03 15:50:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-05-03 15:50:28,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-05-03 15:50:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-05-03 15:50:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-05-03 15:50:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 15:50:28,446 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:28,447 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:28,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:50:28,447 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-05-03 15:50:28,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:28,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309077004] [2021-05-03 15:50:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:28,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309077004] [2021-05-03 15:50:28,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:50:28,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 15:50:28,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342920675] [2021-05-03 15:50:28,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 15:50:28,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 15:50:28,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:50:28,529 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:28,549 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-05-03 15:50:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 15:50:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 15:50:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:28,552 INFO L225 Difference]: With dead ends: 32 [2021-05-03 15:50:28,553 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 15:50:28,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:50:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 15:50:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-03 15:50:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-05-03 15:50:28,565 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-05-03 15:50:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:28,565 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-05-03 15:50:28,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-05-03 15:50:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 15:50:28,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:28,569 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:28,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 15:50:28,569 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-05-03 15:50:28,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:28,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918034669] [2021-05-03 15:50:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:28,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918034669] [2021-05-03 15:50:28,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013203526] [2021-05-03 15:50:28,690 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 [2021-05-03 15:50:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:50:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:28,933 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 16 treesize of output 10 [2021-05-03 15:50:28,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:28,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:28,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:28,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-05-03 15:50:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:28,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:28,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-03 15:50:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724564431] [2021-05-03 15:50:28,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:50:28,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:50:28,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:50:28,995 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:29,052 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-05-03 15:50:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:50:29,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 15:50:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:29,054 INFO L225 Difference]: With dead ends: 52 [2021-05-03 15:50:29,054 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 15:50:29,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:50:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 15:50:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-05-03 15:50:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-05-03 15:50:29,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-05-03 15:50:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:29,059 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-05-03 15:50:29,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-05-03 15:50:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 15:50:29,060 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:29,060 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:29,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 15:50:29,279 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-05-03 15:50:29,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:29,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161643295] [2021-05-03 15:50:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:50:29,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161643295] [2021-05-03 15:50:29,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:50:29,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:50:29,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837951314] [2021-05-03 15:50:29,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 15:50:29,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:29,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 15:50:29,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:50:29,300 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:29,307 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-05-03 15:50:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 15:50:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 15:50:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:29,310 INFO L225 Difference]: With dead ends: 40 [2021-05-03 15:50:29,310 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 15:50:29,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:50:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 15:50:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-05-03 15:50:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 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) [2021-05-03 15:50:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-05-03 15:50:29,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-05-03 15:50:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:29,315 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-05-03 15:50:29,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-05-03 15:50:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 15:50:29,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:29,315 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:29,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 15:50:29,316 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-05-03 15:50:29,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:29,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066296522] [2021-05-03 15:50:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:29,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066296522] [2021-05-03 15:50:29,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:50:29,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:50:29,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420647673] [2021-05-03 15:50:29,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:50:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:50:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:50:29,369 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:29,407 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-05-03 15:50:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:50:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 15:50:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:29,414 INFO L225 Difference]: With dead ends: 86 [2021-05-03 15:50:29,414 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 15:50:29,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:50:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 15:50:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-05-03 15:50:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-05-03 15:50:29,420 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-05-03 15:50:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:29,420 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-05-03 15:50:29,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-05-03 15:50:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:50:29,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:29,421 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:29,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 15:50:29,421 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:29,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-05-03 15:50:29,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:29,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824101673] [2021-05-03 15:50:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:50:29,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824101673] [2021-05-03 15:50:29,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870187478] [2021-05-03 15:50:29,441 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 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 [2021-05-03 15:50:29,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:50:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 15:50:29,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:50:29,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:29,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-03 15:50:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982172157] [2021-05-03 15:50:29,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:50:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:50:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:50:29,602 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:29,616 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-05-03 15:50:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:50:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:50:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:29,618 INFO L225 Difference]: With dead ends: 79 [2021-05-03 15:50:29,618 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 15:50:29,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:50:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 15:50:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-03 15:50:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-05-03 15:50:29,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-05-03 15:50:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:29,625 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-05-03 15:50:29,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-05-03 15:50:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:50:29,626 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:29,626 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:29,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:29,829 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:29,830 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-05-03 15:50:29,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:29,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553418460] [2021-05-03 15:50:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:29,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553418460] [2021-05-03 15:50:29,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689519881] [2021-05-03 15:50:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 15:50:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:50:29,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:30,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:30,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 15:50:30,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:30,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:30,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:30,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-05-03 15:50:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:30,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:30,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 15:50:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872004545] [2021-05-03 15:50:30,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:50:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:50:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:50:30,188 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:30,246 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-05-03 15:50:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:50:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:50:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:30,248 INFO L225 Difference]: With dead ends: 106 [2021-05-03 15:50:30,248 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 15:50:30,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:50:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 15:50:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-05-03 15:50:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-05-03 15:50:30,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-05-03 15:50:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:30,254 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-05-03 15:50:30,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-05-03 15:50:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:50:30,254 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:30,254 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:30,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:30,469 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-05-03 15:50:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:30,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865685138] [2021-05-03 15:50:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865685138] [2021-05-03 15:50:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838052617] [2021-05-03 15:50:30,555 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 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 [2021-05-03 15:50:30,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:50:30,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:50:30,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:30,676 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 15:50:30,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 15:50:30,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:30,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:30,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:30,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-05-03 15:50:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:30,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:30,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 15:50:30,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770356798] [2021-05-03 15:50:30,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:50:30,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:50:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:50:30,696 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:30,742 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-05-03 15:50:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:50:30,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:50:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:30,744 INFO L225 Difference]: With dead ends: 111 [2021-05-03 15:50:30,744 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 15:50:30,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:50:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 15:50:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-05-03 15:50:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-05-03 15:50:30,750 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-05-03 15:50:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:30,750 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-05-03 15:50:30,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-05-03 15:50:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:50:30,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:30,751 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:30,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:30,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-05-03 15:50:30,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:30,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022757136] [2021-05-03 15:50:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:31,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022757136] [2021-05-03 15:50:31,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377236529] [2021-05-03 15:50:31,016 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 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 [2021-05-03 15:50:31,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:50:31,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:50:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:31,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:31,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:50:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343737943] [2021-05-03 15:50:31,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:50:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:31,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:50:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:50:31,103 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:31,125 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-05-03 15:50:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:50:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 15:50:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:31,126 INFO L225 Difference]: With dead ends: 178 [2021-05-03 15:50:31,126 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 15:50:31,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:50:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 15:50:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-05-03 15:50:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-05-03 15:50:31,145 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-05-03 15:50:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:31,145 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-05-03 15:50:31,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-05-03 15:50:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:50:31,146 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:31,146 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:31,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:31,347 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-05-03 15:50:31,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:31,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984986235] [2021-05-03 15:50:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984986235] [2021-05-03 15:50:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870245315] [2021-05-03 15:50:31,588 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:50:31,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:50:31,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:31,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:31,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:31,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:31,822 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 54 treesize of output 24 [2021-05-03 15:50:31,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:31,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:31,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:31,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-05-03 15:50:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:31,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:31,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 15:50:31,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388215395] [2021-05-03 15:50:31,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:50:31,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:31,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:50:31,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:50:31,843 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:31,950 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-05-03 15:50:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:50:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:50:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:31,952 INFO L225 Difference]: With dead ends: 229 [2021-05-03 15:50:31,952 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 15:50:31,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:50:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 15:50:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-05-03 15:50:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-05-03 15:50:31,956 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-05-03 15:50:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:31,956 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-05-03 15:50:31,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-05-03 15:50:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:50:31,957 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:31,957 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:32,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:32,173 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-05-03 15:50:32,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:32,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322572625] [2021-05-03 15:50:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:32,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322572625] [2021-05-03 15:50:32,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948792573] [2021-05-03 15:50:32,382 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:50:32,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:50:32,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:32,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:50:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:32,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:32,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:32,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:32,621 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 54 treesize of output 24 [2021-05-03 15:50:32,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:32,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:32,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:32,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-05-03 15:50:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:32,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:32,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 15:50:32,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209056496] [2021-05-03 15:50:32,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:50:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:50:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:50:32,647 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:32,749 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-05-03 15:50:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:50:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:50:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:32,751 INFO L225 Difference]: With dead ends: 242 [2021-05-03 15:50:32,751 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 15:50:32,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:50:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 15:50:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-05-03 15:50:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-05-03 15:50:32,758 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-05-03 15:50:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:32,759 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-05-03 15:50:32,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-05-03 15:50:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:50:32,760 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:32,760 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:32,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:32,986 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:32,986 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-05-03 15:50:32,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:32,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648431064] [2021-05-03 15:50:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:33,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648431064] [2021-05-03 15:50:33,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681179098] [2021-05-03 15:50:33,144 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 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 [2021-05-03 15:50:33,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:50:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:50:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:33,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:33,292 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 54 treesize of output 24 [2021-05-03 15:50:33,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:33,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:33,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:33,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-05-03 15:50:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:33,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:33,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 15:50:33,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304298438] [2021-05-03 15:50:33,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:50:33,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:33,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:50:33,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:50:33,324 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:33,487 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-05-03 15:50:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:50:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:50:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:33,489 INFO L225 Difference]: With dead ends: 370 [2021-05-03 15:50:33,489 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 15:50:33,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 15:50:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-05-03 15:50:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-05-03 15:50:33,494 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-05-03 15:50:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:33,494 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-05-03 15:50:33,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-05-03 15:50:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:50:33,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:33,495 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:33,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-03 15:50:33,702 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-05-03 15:50:33,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:33,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653904168] [2021-05-03 15:50:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:33,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653904168] [2021-05-03 15:50:33,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570027452] [2021-05-03 15:50:33,878 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 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 [2021-05-03 15:50:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:50:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:34,071 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 54 treesize of output 24 [2021-05-03 15:50:34,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:34,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:34,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:34,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-05-03 15:50:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:34,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:34,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 15:50:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73112010] [2021-05-03 15:50:34,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:50:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:50:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:50:34,092 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:34,237 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-05-03 15:50:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:50:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:50:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:34,239 INFO L225 Difference]: With dead ends: 296 [2021-05-03 15:50:34,239 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 15:50:34,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:50:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 15:50:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-05-03 15:50:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-05-03 15:50:34,244 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-05-03 15:50:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:34,245 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-05-03 15:50:34,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-05-03 15:50:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:50:34,245 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:34,245 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:34,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:34,461 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:34,461 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-05-03 15:50:34,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:34,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397654932] [2021-05-03 15:50:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397654932] [2021-05-03 15:50:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530141676] [2021-05-03 15:50:34,581 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 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 [2021-05-03 15:50:34,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:50:34,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:50:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:34,712 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-03 15:50:34,712 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 54 treesize of output 24 [2021-05-03 15:50:34,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:34,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:34,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:34,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-05-03 15:50:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:34,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:34,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 15:50:34,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518143467] [2021-05-03 15:50:34,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:50:34,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:50:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:50:34,730 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:34,816 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-05-03 15:50:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:50:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:50:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:34,818 INFO L225 Difference]: With dead ends: 174 [2021-05-03 15:50:34,818 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 15:50:34,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:50:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 15:50:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-05-03 15:50:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 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) [2021-05-03 15:50:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-05-03 15:50:34,822 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-05-03 15:50:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:34,822 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-05-03 15:50:34,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:34,823 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-05-03 15:50:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:50:34,823 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:34,823 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:35,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:35,037 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:35,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:35,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-05-03 15:50:35,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:35,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725327734] [2021-05-03 15:50:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:35,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725327734] [2021-05-03 15:50:35,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176258783] [2021-05-03 15:50:35,070 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 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 [2021-05-03 15:50:35,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:50:35,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:50:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:35,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:35,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 15:50:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637159085] [2021-05-03 15:50:35,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:50:35,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:50:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:50:35,146 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:35,167 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-05-03 15:50:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:50:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 15:50:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:35,169 INFO L225 Difference]: With dead ends: 258 [2021-05-03 15:50:35,169 INFO L226 Difference]: Without dead ends: 254 [2021-05-03 15:50:35,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:50:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-03 15:50:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-05-03 15:50:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-05-03 15:50:35,174 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-05-03 15:50:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:35,174 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-05-03 15:50:35,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-05-03 15:50:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:35,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:35,175 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:35,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:50:35,393 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-05-03 15:50:35,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:35,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648281054] [2021-05-03 15:50:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:50:35,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648281054] [2021-05-03 15:50:35,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3138658] [2021-05-03 15:50:35,642 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 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 [2021-05-03 15:50:35,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:50:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:35,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:50:35,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:35,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:35,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:35,940 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 73 treesize of output 31 [2021-05-03 15:50:35,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:35,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:35,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:35,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-05-03 15:50:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:35,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:35,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 15:50:35,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597249258] [2021-05-03 15:50:35,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:50:35,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:50:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:50:35,965 INFO L87 Difference]: Start difference. First operand 144 states and 301 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-05-03 15:50:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:36,219 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-05-03 15:50:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:50:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-05-03 15:50:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:36,224 INFO L225 Difference]: With dead ends: 412 [2021-05-03 15:50:36,225 INFO L226 Difference]: Without dead ends: 275 [2021-05-03 15:50:36,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-03 15:50:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-05-03 15:50:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-05-03 15:50:36,234 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-05-03 15:50:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:36,234 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-05-03 15:50:36,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-05-03 15:50:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-05-03 15:50:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:36,235 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:36,235 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:36,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 15:50:36,453 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-05-03 15:50:36,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:36,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475073606] [2021-05-03 15:50:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:36,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475073606] [2021-05-03 15:50:36,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521733145] [2021-05-03 15:50:36,634 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 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 [2021-05-03 15:50:36,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:50:36,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:50:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:36,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:36,982 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 73 treesize of output 31 [2021-05-03 15:50:36,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:36,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:36,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:36,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-05-03 15:50:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:37,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:37,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 15:50:37,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525105423] [2021-05-03 15:50:37,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:50:37,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:50:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:50:37,004 INFO L87 Difference]: Start difference. First operand 186 states and 376 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-05-03 15:50:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:37,157 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-05-03 15:50:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:50:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-05-03 15:50:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:37,159 INFO L225 Difference]: With dead ends: 449 [2021-05-03 15:50:37,160 INFO L226 Difference]: Without dead ends: 397 [2021-05-03 15:50:37,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:50:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-03 15:50:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-05-03 15:50:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-05-03 15:50:37,169 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-05-03 15:50:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:37,169 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-05-03 15:50:37,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-05-03 15:50:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-05-03 15:50:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:37,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:37,170 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:37,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:50:37,389 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-05-03 15:50:37,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:37,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5871895] [2021-05-03 15:50:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:37,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5871895] [2021-05-03 15:50:37,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840019301] [2021-05-03 15:50:37,549 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:50:37,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:50:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:37,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 15:50:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:37,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:37,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:37,854 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 77 treesize of output 31 [2021-05-03 15:50:37,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:37,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:37,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:37,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:87, output treesize:7 [2021-05-03 15:50:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:37,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:37,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 15:50:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436044327] [2021-05-03 15:50:37,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:50:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:50:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:50:37,890 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-05-03 15:50:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:38,031 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-05-03 15:50:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:50:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 27 [2021-05-03 15:50:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:38,033 INFO L225 Difference]: With dead ends: 418 [2021-05-03 15:50:38,033 INFO L226 Difference]: Without dead ends: 381 [2021-05-03 15:50:38,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:50:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-03 15:50:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-05-03 15:50:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-05-03 15:50:38,054 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-05-03 15:50:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:38,054 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-05-03 15:50:38,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-05-03 15:50:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-05-03 15:50:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:38,057 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:38,057 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:38,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:38,271 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:38,272 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-05-03 15:50:38,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:38,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130963572] [2021-05-03 15:50:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130963572] [2021-05-03 15:50:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287527488] [2021-05-03 15:50:38,453 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:50:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:38,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:50:38,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:38,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-05-03 15:50:38,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:38,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:38,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:38,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-05-03 15:50:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:38,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:38,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-05-03 15:50:38,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265980657] [2021-05-03 15:50:38,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:50:38,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:50:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:38,711 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:39,039 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-05-03 15:50:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:50:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:39,042 INFO L225 Difference]: With dead ends: 607 [2021-05-03 15:50:39,042 INFO L226 Difference]: Without dead ends: 443 [2021-05-03 15:50:39,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-05-03 15:50:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-05-03 15:50:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.9923076923076923) internal successors, (518), 260 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-05-03 15:50:39,051 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-05-03 15:50:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:39,051 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-05-03 15:50:39,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-05-03 15:50:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:39,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:39,052 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:39,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:39,265 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-05-03 15:50:39,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:39,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156628952] [2021-05-03 15:50:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:39,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156628952] [2021-05-03 15:50:39,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497011523] [2021-05-03 15:50:39,479 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 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 [2021-05-03 15:50:39,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:50:39,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:50:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:39,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:39,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-05-03 15:50:39,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:39,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:39,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:39,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-05-03 15:50:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:39,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:39,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 15:50:39,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977502407] [2021-05-03 15:50:39,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:50:39,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:50:39,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:50:39,761 INFO L87 Difference]: Start difference. First operand 261 states and 518 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:39,999 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-05-03 15:50:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:50:40,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:50:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:40,003 INFO L225 Difference]: With dead ends: 566 [2021-05-03 15:50:40,003 INFO L226 Difference]: Without dead ends: 514 [2021-05-03 15:50:40,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:50:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-03 15:50:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-05-03 15:50:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.9758620689655173) internal successors, (573), 290 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-05-03 15:50:40,015 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-05-03 15:50:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:40,015 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-05-03 15:50:40,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-05-03 15:50:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:40,016 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:40,016 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:40,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:40,233 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-05-03 15:50:40,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:40,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740994187] [2021-05-03 15:50:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:40,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740994187] [2021-05-03 15:50:40,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700270403] [2021-05-03 15:50:40,406 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 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 [2021-05-03 15:50:40,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:50:40,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:50:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:40,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:40,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 31 [2021-05-03 15:50:40,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:40,798 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-05-03 15:50:40,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:40,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-05-03 15:50:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:40,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:40,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-05-03 15:50:40,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049127295] [2021-05-03 15:50:40,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:50:40,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:40,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:50:40,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:40,811 INFO L87 Difference]: Start difference. First operand 291 states and 573 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:41,231 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-05-03 15:50:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:50:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:50:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:41,233 INFO L225 Difference]: With dead ends: 619 [2021-05-03 15:50:41,233 INFO L226 Difference]: Without dead ends: 501 [2021-05-03 15:50:41,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-05-03 15:50:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-05-03 15:50:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-05-03 15:50:41,242 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-05-03 15:50:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:41,242 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-05-03 15:50:41,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-05-03 15:50:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:41,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:41,243 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:41,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 15:50:41,463 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:41,463 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-05-03 15:50:41,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:41,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618993894] [2021-05-03 15:50:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618993894] [2021-05-03 15:50:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870206055] [2021-05-03 15:50:41,616 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 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 [2021-05-03 15:50:41,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:50:41,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:41,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:50:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:41,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:41,866 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 73 treesize of output 31 [2021-05-03 15:50:41,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:41,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:41,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:41,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-05-03 15:50:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:41,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:41,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 15:50:41,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37294206] [2021-05-03 15:50:41,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:50:41,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:50:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:41,889 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-05-03 15:50:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:42,119 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-05-03 15:50:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:50:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 27 [2021-05-03 15:50:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:42,123 INFO L225 Difference]: With dead ends: 631 [2021-05-03 15:50:42,123 INFO L226 Difference]: Without dead ends: 579 [2021-05-03 15:50:42,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-05-03 15:50:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-05-03 15:50:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-05-03 15:50:42,137 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-05-03 15:50:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:42,137 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-05-03 15:50:42,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-05-03 15:50:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-05-03 15:50:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:50:42,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:42,139 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:42,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 15:50:42,353 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-05-03 15:50:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:42,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132932258] [2021-05-03 15:50:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132932258] [2021-05-03 15:50:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370623781] [2021-05-03 15:50:42,531 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:50:42,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:50:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:42,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 15:50:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:42,813 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 73 treesize of output 31 [2021-05-03 15:50:42,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:42,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:42,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:42,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-05-03 15:50:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:42,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:42,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 15:50:42,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856604944] [2021-05-03 15:50:42,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:50:42,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:42,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:50:42,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:42,837 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:43,091 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-05-03 15:50:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:50:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:50:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:43,094 INFO L225 Difference]: With dead ends: 654 [2021-05-03 15:50:43,094 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 15:50:43,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:50:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 15:50:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-05-03 15:50:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.9802259887005649) internal successors, (701), 354 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-05-03 15:50:43,107 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-05-03 15:50:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:43,107 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-05-03 15:50:43,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-05-03 15:50:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:43,108 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:43,108 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:43,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:50:43,321 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:43,321 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-05-03 15:50:43,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:43,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102835747] [2021-05-03 15:50:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102835747] [2021-05-03 15:50:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039889424] [2021-05-03 15:50:43,532 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 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 [2021-05-03 15:50:43,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:50:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:43,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:43,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:43,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:43,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:43,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:43,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:43,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:43,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 15:50:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457007408] [2021-05-03 15:50:43,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:50:43,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:50:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:43,949 INFO L87 Difference]: Start difference. First operand 355 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:44,203 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-05-03 15:50:44,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:44,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:44,207 INFO L225 Difference]: With dead ends: 666 [2021-05-03 15:50:44,207 INFO L226 Difference]: Without dead ends: 629 [2021-05-03 15:50:44,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-03 15:50:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-05-03 15:50:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.9724517906336088) internal successors, (716), 363 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-05-03 15:50:44,223 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-05-03 15:50:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:44,223 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-05-03 15:50:44,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-05-03 15:50:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:44,225 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:44,225 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:44,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 15:50:44,441 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-05-03 15:50:44,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:44,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993150291] [2021-05-03 15:50:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993150291] [2021-05-03 15:50:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361758836] [2021-05-03 15:50:44,620 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 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 [2021-05-03 15:50:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:44,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:45,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:45,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:45,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:45,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:45,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:45,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:45,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:45,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:45,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:45,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 15:50:45,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614340473] [2021-05-03 15:50:45,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:50:45,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:50:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:50:45,064 INFO L87 Difference]: Start difference. First operand 364 states and 716 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:45,345 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-05-03 15:50:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:45,348 INFO L225 Difference]: With dead ends: 559 [2021-05-03 15:50:45,348 INFO L226 Difference]: Without dead ends: 532 [2021-05-03 15:50:45,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 521.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:50:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-03 15:50:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-05-03 15:50:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.9667673716012084) internal successors, (651), 331 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-05-03 15:50:45,365 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-05-03 15:50:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:45,365 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-05-03 15:50:45,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-05-03 15:50:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:45,366 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:45,367 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:45,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 15:50:45,585 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-05-03 15:50:45,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:45,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409981031] [2021-05-03 15:50:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:45,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409981031] [2021-05-03 15:50:45,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525256255] [2021-05-03 15:50:45,736 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 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 [2021-05-03 15:50:45,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:50:45,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:45,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:46,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:46,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:46,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:46,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:46,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:46,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:46,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:46,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:46,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 15:50:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635288162] [2021-05-03 15:50:46,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:50:46,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:50:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:46,130 INFO L87 Difference]: Start difference. First operand 332 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:46,397 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-05-03 15:50:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:46,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:46,400 INFO L225 Difference]: With dead ends: 724 [2021-05-03 15:50:46,400 INFO L226 Difference]: Without dead ends: 666 [2021-05-03 15:50:46,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-05-03 15:50:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-05-03 15:50:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.013986013986014) internal successors, (576), 286 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-05-03 15:50:46,408 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-05-03 15:50:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:46,408 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-05-03 15:50:46,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-05-03 15:50:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:46,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:46,409 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:46,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:46,629 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-05-03 15:50:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:46,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334868783] [2021-05-03 15:50:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:46,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334868783] [2021-05-03 15:50:46,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408551401] [2021-05-03 15:50:46,878 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 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 [2021-05-03 15:50:46,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:50:46,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:46,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:47,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:47,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:47,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:47,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:47,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:47,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:47,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:47,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:47,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 15:50:47,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677391441] [2021-05-03 15:50:47,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:50:47,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:50:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:47,298 INFO L87 Difference]: Start difference. First operand 287 states and 576 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:47,567 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-05-03 15:50:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:47,569 INFO L225 Difference]: With dead ends: 700 [2021-05-03 15:50:47,569 INFO L226 Difference]: Without dead ends: 523 [2021-05-03 15:50:47,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:50:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-05-03 15:50:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-05-03 15:50:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.9938461538461538) internal successors, (648), 325 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-05-03 15:50:47,577 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-05-03 15:50:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:47,577 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-05-03 15:50:47,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-05-03 15:50:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:47,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:47,578 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:47,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 15:50:47,797 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-05-03 15:50:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:47,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812870377] [2021-05-03 15:50:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:47,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812870377] [2021-05-03 15:50:47,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802823001] [2021-05-03 15:50:47,977 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 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 [2021-05-03 15:50:48,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:50:48,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:48,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:48,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:48,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:48,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:48,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:48,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:48,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:48,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:48,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-03 15:50:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044459347] [2021-05-03 15:50:48,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:50:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:50:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:50:48,391 INFO L87 Difference]: Start difference. First operand 326 states and 648 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:48,785 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-05-03 15:50:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:48,787 INFO L225 Difference]: With dead ends: 672 [2021-05-03 15:50:48,787 INFO L226 Difference]: Without dead ends: 617 [2021-05-03 15:50:48,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:50:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-05-03 15:50:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-05-03 15:50:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-05-03 15:50:48,795 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-05-03 15:50:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:48,796 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-05-03 15:50:48,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-05-03 15:50:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:48,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:48,796 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:49,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:49,013 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-05-03 15:50:49,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:49,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612208838] [2021-05-03 15:50:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612208838] [2021-05-03 15:50:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754675869] [2021-05-03 15:50:49,199 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 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 [2021-05-03 15:50:49,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:50:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:49,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:50:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:49,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:49,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:49,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:49,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:49,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:49,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:49,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:49,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-03 15:50:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195819149] [2021-05-03 15:50:49,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:50:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:50:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:50:49,614 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:49,922 INFO L93 Difference]: Finished difference Result 651 states and 1304 transitions. [2021-05-03 15:50:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:49,925 INFO L225 Difference]: With dead ends: 651 [2021-05-03 15:50:49,925 INFO L226 Difference]: Without dead ends: 473 [2021-05-03 15:50:49,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:50:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-05-03 15:50:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 323. [2021-05-03 15:50:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.9968944099378882) internal successors, (643), 322 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-05-03 15:50:49,935 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-05-03 15:50:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:49,935 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-05-03 15:50:49,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-05-03 15:50:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:49,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:49,936 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:50,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 15:50:50,147 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-05-03 15:50:50,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:50,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822558312] [2021-05-03 15:50:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822558312] [2021-05-03 15:50:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967136485] [2021-05-03 15:50:50,337 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 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 [2021-05-03 15:50:50,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:50:50,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:50,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:50,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:50,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:50,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:50,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:50,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:50,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:50,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:50,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:50,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-05-03 15:50:50,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48450425] [2021-05-03 15:50:50,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:50:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:50:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:50,730 INFO L87 Difference]: Start difference. First operand 323 states and 643 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:51,154 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-05-03 15:50:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:50:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:51,157 INFO L225 Difference]: With dead ends: 636 [2021-05-03 15:50:51,157 INFO L226 Difference]: Without dead ends: 591 [2021-05-03 15:50:51,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:50:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-03 15:50:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-05-03 15:50:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.0065789473684212) internal successors, (610), 304 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-05-03 15:50:51,165 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-05-03 15:50:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:51,165 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-05-03 15:50:51,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-05-03 15:50:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:51,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:51,166 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:51,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:51,381 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-05-03 15:50:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:51,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969991621] [2021-05-03 15:50:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:51,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969991621] [2021-05-03 15:50:51,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880545755] [2021-05-03 15:50:51,596 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 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 [2021-05-03 15:50:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:51,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:51,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:51,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:51,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:51,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:51,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:51,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:51,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-05-03 15:50:51,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398581170] [2021-05-03 15:50:51,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:50:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:50:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:51,947 INFO L87 Difference]: Start difference. First operand 305 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:52,360 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-05-03 15:50:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:50:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:52,380 INFO L225 Difference]: With dead ends: 779 [2021-05-03 15:50:52,380 INFO L226 Difference]: Without dead ends: 565 [2021-05-03 15:50:52,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:50:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-03 15:50:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-05-03 15:50:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.9658119658119657) internal successors, (690), 351 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-05-03 15:50:52,392 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-05-03 15:50:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:52,392 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-05-03 15:50:52,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-05-03 15:50:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:52,393 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:52,393 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:52,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 15:50:52,614 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-05-03 15:50:52,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:52,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407347620] [2021-05-03 15:50:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:52,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407347620] [2021-05-03 15:50:52,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294644168] [2021-05-03 15:50:52,856 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 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 [2021-05-03 15:50:52,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:50:52,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:52,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:52,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:53,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:53,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:53,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:53,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:53,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:53,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:53,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-05-03 15:50:53,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410436499] [2021-05-03 15:50:53,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:50:53,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:50:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:53,232 INFO L87 Difference]: Start difference. First operand 352 states and 690 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:53,592 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-05-03 15:50:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:50:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:53,594 INFO L225 Difference]: With dead ends: 731 [2021-05-03 15:50:53,594 INFO L226 Difference]: Without dead ends: 505 [2021-05-03 15:50:53,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:50:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-03 15:50:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-05-03 15:50:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8725868725868726) internal successors, (485), 259 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-05-03 15:50:53,600 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-05-03 15:50:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:53,601 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-05-03 15:50:53,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-05-03 15:50:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:53,601 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:53,601 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:53,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:53,813 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-05-03 15:50:53,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:53,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140593610] [2021-05-03 15:50:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:53,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140593610] [2021-05-03 15:50:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362198080] [2021-05-03 15:50:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 15:50:54,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:50:54,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:54,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 15:50:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:54,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 36 [2021-05-03 15:50:54,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:54,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:54,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:54,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:7 [2021-05-03 15:50:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:54,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:54,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 15:50:54,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572741649] [2021-05-03 15:50:54,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:50:54,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:50:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:50:54,366 INFO L87 Difference]: Start difference. First operand 260 states and 485 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:54,638 INFO L93 Difference]: Finished difference Result 729 states and 1425 transitions. [2021-05-03 15:50:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:50:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:54,641 INFO L225 Difference]: With dead ends: 729 [2021-05-03 15:50:54,641 INFO L226 Difference]: Without dead ends: 548 [2021-05-03 15:50:54,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:50:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-05-03 15:50:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 293. [2021-05-03 15:50:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.8835616438356164) internal successors, (550), 292 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 550 transitions. [2021-05-03 15:50:54,654 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 550 transitions. Word has length 31 [2021-05-03 15:50:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:54,654 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 550 transitions. [2021-05-03 15:50:54,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 550 transitions. [2021-05-03 15:50:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:54,655 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:54,655 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:54,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 15:50:54,865 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-05-03 15:50:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:54,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579932249] [2021-05-03 15:50:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:55,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579932249] [2021-05-03 15:50:55,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698287365] [2021-05-03 15:50:55,046 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 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 [2021-05-03 15:50:55,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:50:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:55,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:55,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:55,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:55,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:55,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:55,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:55,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:55,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:55,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:55,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-05-03 15:50:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368697214] [2021-05-03 15:50:55,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:50:55,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:55,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:50:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:50:55,328 INFO L87 Difference]: Start difference. First operand 293 states and 550 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:55,804 INFO L93 Difference]: Finished difference Result 779 states and 1495 transitions. [2021-05-03 15:50:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:50:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:55,806 INFO L225 Difference]: With dead ends: 779 [2021-05-03 15:50:55,806 INFO L226 Difference]: Without dead ends: 568 [2021-05-03 15:50:55,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:50:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-05-03 15:50:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 360. [2021-05-03 15:50:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.8579387186629526) internal successors, (667), 359 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 667 transitions. [2021-05-03 15:50:55,814 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 667 transitions. Word has length 31 [2021-05-03 15:50:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:55,815 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 667 transitions. [2021-05-03 15:50:55,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 667 transitions. [2021-05-03 15:50:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:55,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:55,815 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:56,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:56,034 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-05-03 15:50:56,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:56,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466998872] [2021-05-03 15:50:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:56,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466998872] [2021-05-03 15:50:56,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103660878] [2021-05-03 15:50:56,210 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 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 [2021-05-03 15:50:56,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:50:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:56,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:50:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:56,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:56,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 36 [2021-05-03 15:50:56,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:56,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:56,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:56,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:7 [2021-05-03 15:50:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:56,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:56,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-05-03 15:50:56,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235669933] [2021-05-03 15:50:56,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:50:56,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:50:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:50:56,595 INFO L87 Difference]: Start difference. First operand 360 states and 667 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:56,801 INFO L93 Difference]: Finished difference Result 716 states and 1390 transitions. [2021-05-03 15:50:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:56,804 INFO L225 Difference]: With dead ends: 716 [2021-05-03 15:50:56,804 INFO L226 Difference]: Without dead ends: 671 [2021-05-03 15:50:56,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-05-03 15:50:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 351. [2021-05-03 15:50:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.8542857142857143) internal successors, (649), 350 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 649 transitions. [2021-05-03 15:50:56,812 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 649 transitions. Word has length 31 [2021-05-03 15:50:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:56,812 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 649 transitions. [2021-05-03 15:50:56,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 649 transitions. [2021-05-03 15:50:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:56,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:56,813 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:57,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 15:50:57,034 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-05-03 15:50:57,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:57,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419460723] [2021-05-03 15:50:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419460723] [2021-05-03 15:50:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103054375] [2021-05-03 15:50:57,229 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 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 [2021-05-03 15:50:57,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:50:57,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:57,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:50:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:50:57,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-05-03 15:50:57,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:57,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:57,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:57,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-05-03 15:50:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:57,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:57,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-05-03 15:50:57,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844057337] [2021-05-03 15:50:57,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:50:57,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:50:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:57,584 INFO L87 Difference]: Start difference. First operand 351 states and 649 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:57,911 INFO L93 Difference]: Finished difference Result 699 states and 1370 transitions. [2021-05-03 15:50:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:50:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:50:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:57,914 INFO L225 Difference]: With dead ends: 699 [2021-05-03 15:50:57,914 INFO L226 Difference]: Without dead ends: 654 [2021-05-03 15:50:57,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:50:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-05-03 15:50:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 372. [2021-05-03 15:50:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.8652291105121295) internal successors, (692), 371 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 692 transitions. [2021-05-03 15:50:57,922 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 692 transitions. Word has length 31 [2021-05-03 15:50:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:57,922 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 692 transitions. [2021-05-03 15:50:57,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 692 transitions. [2021-05-03 15:50:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:50:57,922 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:57,923 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:58,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 15:50:58,141 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-05-03 15:50:58,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:58,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174008074] [2021-05-03 15:50:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:58,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174008074] [2021-05-03 15:50:58,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528154863] [2021-05-03 15:50:58,393 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 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 [2021-05-03 15:50:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:58,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:50:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:58,623 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-05-03 15:50:58,623 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 90 treesize of output 36 [2021-05-03 15:50:58,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:50:58,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:50:58,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:50:58,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-05-03 15:50:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:58,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:58,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-05-03 15:50:58,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007171100] [2021-05-03 15:50:58,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:50:58,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:58,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:50:58,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:50:58,641 INFO L87 Difference]: Start difference. First operand 372 states and 692 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:58,873 INFO L93 Difference]: Finished difference Result 563 states and 1082 transitions. [2021-05-03 15:50:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:50:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:50:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:58,876 INFO L225 Difference]: With dead ends: 563 [2021-05-03 15:50:58,876 INFO L226 Difference]: Without dead ends: 548 [2021-05-03 15:50:58,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:50:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-05-03 15:50:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 379. [2021-05-03 15:50:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.8703703703703705) internal successors, (707), 378 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 707 transitions. [2021-05-03 15:50:58,883 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 707 transitions. Word has length 31 [2021-05-03 15:50:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:58,883 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 707 transitions. [2021-05-03 15:50:58,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 707 transitions. [2021-05-03 15:50:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:50:58,884 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:58,884 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:59,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 15:50:59,097 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-05-03 15:50:59,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:59,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545456395] [2021-05-03 15:50:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:50:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545456395] [2021-05-03 15:50:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147863247] [2021-05-03 15:50:59,145 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 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 [2021-05-03 15:50:59,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:50:59,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 15:50:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:50:59,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:59,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 15:50:59,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738681271] [2021-05-03 15:50:59,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:50:59,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:50:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:50:59,249 INFO L87 Difference]: Start difference. First operand 379 states and 707 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:59,273 INFO L93 Difference]: Finished difference Result 589 states and 1126 transitions. [2021-05-03 15:50:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:50:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:50:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:59,275 INFO L225 Difference]: With dead ends: 589 [2021-05-03 15:50:59,275 INFO L226 Difference]: Without dead ends: 584 [2021-05-03 15:50:59,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:50:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-03 15:50:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 496. [2021-05-03 15:50:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.97979797979798) internal successors, (980), 495 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 980 transitions. [2021-05-03 15:50:59,285 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 980 transitions. Word has length 32 [2021-05-03 15:50:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:59,286 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 980 transitions. [2021-05-03 15:50:59,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 980 transitions. [2021-05-03 15:50:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:50:59,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:59,287 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:59,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 15:50:59,497 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-05-03 15:50:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:59,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843069562] [2021-05-03 15:50:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:59,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843069562] [2021-05-03 15:50:59,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039045648] [2021-05-03 15:50:59,548 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 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 [2021-05-03 15:50:59,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:50:59,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 15:50:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:59,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:59,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 15:50:59,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185636142] [2021-05-03 15:50:59,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:50:59,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:59,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:50:59,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:50:59,664 INFO L87 Difference]: Start difference. First operand 496 states and 980 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:59,702 INFO L93 Difference]: Finished difference Result 769 states and 1530 transitions. [2021-05-03 15:50:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:50:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:50:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:59,707 INFO L225 Difference]: With dead ends: 769 [2021-05-03 15:50:59,707 INFO L226 Difference]: Without dead ends: 763 [2021-05-03 15:50:59,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:50:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-05-03 15:50:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 541. [2021-05-03 15:50:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.0055555555555555) internal successors, (1083), 540 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1083 transitions. [2021-05-03 15:50:59,723 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1083 transitions. Word has length 32 [2021-05-03 15:50:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:59,724 INFO L480 AbstractCegarLoop]: Abstraction has 541 states and 1083 transitions. [2021-05-03 15:50:59,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1083 transitions. [2021-05-03 15:50:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:50:59,726 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:59,726 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:59,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 15:50:59,945 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-05-03 15:50:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:59,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488382057] [2021-05-03 15:50:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488382057] [2021-05-03 15:51:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771306997] [2021-05-03 15:51:00,145 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:00,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:51:00,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:00,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:00,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:00,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:00,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:00,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:00,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:00,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:00,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:00,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-03 15:51:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884937059] [2021-05-03 15:51:00,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:51:00,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:51:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:51:00,679 INFO L87 Difference]: Start difference. First operand 541 states and 1083 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:01,238 INFO L93 Difference]: Finished difference Result 1447 states and 2998 transitions. [2021-05-03 15:51:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:51:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:01,243 INFO L225 Difference]: With dead ends: 1447 [2021-05-03 15:51:01,243 INFO L226 Difference]: Without dead ends: 1355 [2021-05-03 15:51:01,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:51:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-05-03 15:51:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 583. [2021-05-03 15:51:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.9948453608247423) internal successors, (1161), 582 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1161 transitions. [2021-05-03 15:51:01,256 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1161 transitions. Word has length 35 [2021-05-03 15:51:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:01,257 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1161 transitions. [2021-05-03 15:51:01,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1161 transitions. [2021-05-03 15:51:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:01,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:01,258 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:01,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 15:51:01,478 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-05-03 15:51:01,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:01,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504329259] [2021-05-03 15:51:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:01,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504329259] [2021-05-03 15:51:01,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589167146] [2021-05-03 15:51:01,768 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 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 [2021-05-03 15:51:01,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:51:01,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:01,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:02,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:02,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:02,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:02,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:02,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:02,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:02,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:02,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:02,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:02,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:51:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007398357] [2021-05-03 15:51:02,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:51:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:51:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:51:02,386 INFO L87 Difference]: Start difference. First operand 583 states and 1161 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:02,829 INFO L93 Difference]: Finished difference Result 1451 states and 3024 transitions. [2021-05-03 15:51:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:51:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:02,834 INFO L225 Difference]: With dead ends: 1451 [2021-05-03 15:51:02,834 INFO L226 Difference]: Without dead ends: 1356 [2021-05-03 15:51:02,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:51:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-05-03 15:51:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 499. [2021-05-03 15:51:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0180722891566263) internal successors, (1005), 498 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1005 transitions. [2021-05-03 15:51:02,846 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1005 transitions. Word has length 35 [2021-05-03 15:51:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:02,847 INFO L480 AbstractCegarLoop]: Abstraction has 499 states and 1005 transitions. [2021-05-03 15:51:02,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1005 transitions. [2021-05-03 15:51:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:02,848 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:02,848 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:03,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-03 15:51:03,057 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-05-03 15:51:03,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:03,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50150202] [2021-05-03 15:51:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:03,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50150202] [2021-05-03 15:51:03,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919394303] [2021-05-03 15:51:03,232 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 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 [2021-05-03 15:51:03,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:51:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:03,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:03,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:03,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:03,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:03,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:03,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:03,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:03,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:03,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:03,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-05-03 15:51:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882713047] [2021-05-03 15:51:03,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:51:03,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:51:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:51:03,777 INFO L87 Difference]: Start difference. First operand 499 states and 1005 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:04,171 INFO L93 Difference]: Finished difference Result 1224 states and 2546 transitions. [2021-05-03 15:51:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:51:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:04,177 INFO L225 Difference]: With dead ends: 1224 [2021-05-03 15:51:04,178 INFO L226 Difference]: Without dead ends: 1034 [2021-05-03 15:51:04,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:51:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-05-03 15:51:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 529. [2021-05-03 15:51:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.003787878787879) internal successors, (1058), 528 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1058 transitions. [2021-05-03 15:51:04,192 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1058 transitions. Word has length 35 [2021-05-03 15:51:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:04,192 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1058 transitions. [2021-05-03 15:51:04,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1058 transitions. [2021-05-03 15:51:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:04,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:04,193 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:04,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:04,413 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-05-03 15:51:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:04,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543191119] [2021-05-03 15:51:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:04,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543191119] [2021-05-03 15:51:04,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114919061] [2021-05-03 15:51:04,669 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 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 [2021-05-03 15:51:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:04,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:05,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:05,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:05,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:05,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:05,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:05,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:05,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:51:05,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608039513] [2021-05-03 15:51:05,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:51:05,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:51:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:51:05,246 INFO L87 Difference]: Start difference. First operand 529 states and 1058 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:05,518 INFO L93 Difference]: Finished difference Result 1214 states and 2502 transitions. [2021-05-03 15:51:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:51:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:05,523 INFO L225 Difference]: With dead ends: 1214 [2021-05-03 15:51:05,523 INFO L226 Difference]: Without dead ends: 1160 [2021-05-03 15:51:05,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:51:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-05-03 15:51:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 523. [2021-05-03 15:51:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.003831417624521) internal successors, (1046), 522 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1046 transitions. [2021-05-03 15:51:05,534 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1046 transitions. Word has length 35 [2021-05-03 15:51:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:05,534 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1046 transitions. [2021-05-03 15:51:05,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1046 transitions. [2021-05-03 15:51:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:05,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:05,536 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:05,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:05,756 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:05,756 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-05-03 15:51:05,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:05,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934392311] [2021-05-03 15:51:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:06,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934392311] [2021-05-03 15:51:06,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681634474] [2021-05-03 15:51:06,020 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 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 [2021-05-03 15:51:06,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:51:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:06,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:06,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:06,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:06,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:06,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:06,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:06,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:06,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:06,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:06,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:06,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:06,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:51:06,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954022880] [2021-05-03 15:51:06,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:51:06,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:51:06,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:51:06,649 INFO L87 Difference]: Start difference. First operand 523 states and 1046 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:07,260 INFO L93 Difference]: Finished difference Result 890 states and 1807 transitions. [2021-05-03 15:51:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:51:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:07,264 INFO L225 Difference]: With dead ends: 890 [2021-05-03 15:51:07,264 INFO L226 Difference]: Without dead ends: 869 [2021-05-03 15:51:07,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:51:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-05-03 15:51:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 529. [2021-05-03 15:51:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.003787878787879) internal successors, (1058), 528 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1058 transitions. [2021-05-03 15:51:07,278 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1058 transitions. Word has length 35 [2021-05-03 15:51:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:07,279 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1058 transitions. [2021-05-03 15:51:07,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1058 transitions. [2021-05-03 15:51:07,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:07,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:07,285 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:07,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:07,501 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-05-03 15:51:07,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:07,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748332050] [2021-05-03 15:51:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:07,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748332050] [2021-05-03 15:51:07,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072265817] [2021-05-03 15:51:07,737 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 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 [2021-05-03 15:51:07,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:51:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:07,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-03 15:51:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:08,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:08,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2021-05-03 15:51:08,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:08,517 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:51:08,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:08,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-05-03 15:51:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:08,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:08,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 15:51:08,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095060498] [2021-05-03 15:51:08,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:51:08,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:51:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:51:08,530 INFO L87 Difference]: Start difference. First operand 529 states and 1058 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-05-03 15:51:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:09,605 INFO L93 Difference]: Finished difference Result 1230 states and 2422 transitions. [2021-05-03 15:51:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:51:09,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 35 [2021-05-03 15:51:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:09,609 INFO L225 Difference]: With dead ends: 1230 [2021-05-03 15:51:09,609 INFO L226 Difference]: Without dead ends: 986 [2021-05-03 15:51:09,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1203.4ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:51:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-05-03 15:51:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 605. [2021-05-03 15:51:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.990066225165563) internal successors, (1202), 604 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1202 transitions. [2021-05-03 15:51:09,617 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1202 transitions. Word has length 35 [2021-05-03 15:51:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:09,617 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 1202 transitions. [2021-05-03 15:51:09,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-05-03 15:51:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1202 transitions. [2021-05-03 15:51:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:09,618 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:09,618 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:09,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 15:51:09,833 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-05-03 15:51:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:09,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223619409] [2021-05-03 15:51:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:10,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223619409] [2021-05-03 15:51:10,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100200955] [2021-05-03 15:51:10,056 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 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 [2021-05-03 15:51:10,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:51:10,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:10,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:10,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:10,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:10,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:10,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:10,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:10,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:10,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:10,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-05-03 15:51:10,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098640529] [2021-05-03 15:51:10,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:51:10,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:10,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:51:10,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:51:10,564 INFO L87 Difference]: Start difference. First operand 605 states and 1202 transitions. Second operand has 25 states, 25 states have (on average 2.12) 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) [2021-05-03 15:51:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:11,035 INFO L93 Difference]: Finished difference Result 1689 states and 3487 transitions. [2021-05-03 15:51:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:51:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) 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 35 [2021-05-03 15:51:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:11,038 INFO L225 Difference]: With dead ends: 1689 [2021-05-03 15:51:11,039 INFO L226 Difference]: Without dead ends: 1560 [2021-05-03 15:51:11,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:51:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-05-03 15:51:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 689. [2021-05-03 15:51:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.9752906976744187) internal successors, (1359), 688 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1359 transitions. [2021-05-03 15:51:11,053 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1359 transitions. Word has length 35 [2021-05-03 15:51:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:11,053 INFO L480 AbstractCegarLoop]: Abstraction has 689 states and 1359 transitions. [2021-05-03 15:51:11,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) 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) [2021-05-03 15:51:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1359 transitions. [2021-05-03 15:51:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:11,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:11,054 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:11,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:11,261 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-05-03 15:51:11,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:11,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408716312] [2021-05-03 15:51:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:11,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408716312] [2021-05-03 15:51:11,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540486578] [2021-05-03 15:51:11,495 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:11,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:51:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:11,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-03 15:51:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:12,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:12,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:12,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:12,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:12,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-05-03 15:51:12,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:12,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:12,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:12,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-05-03 15:51:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:12,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:12,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 15:51:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331975097] [2021-05-03 15:51:12,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:51:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:51:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:12,166 INFO L87 Difference]: Start difference. First operand 689 states and 1359 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:13,550 INFO L93 Difference]: Finished difference Result 1357 states and 2742 transitions. [2021-05-03 15:51:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:51:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:13,554 INFO L225 Difference]: With dead ends: 1357 [2021-05-03 15:51:13,554 INFO L226 Difference]: Without dead ends: 1135 [2021-05-03 15:51:13,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1335.6ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:51:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-05-03 15:51:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 725. [2021-05-03 15:51:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.9765193370165746) internal successors, (1431), 724 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1431 transitions. [2021-05-03 15:51:13,566 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1431 transitions. Word has length 35 [2021-05-03 15:51:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:13,566 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 1431 transitions. [2021-05-03 15:51:13,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1431 transitions. [2021-05-03 15:51:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:13,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:13,567 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:13,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:13,772 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-05-03 15:51:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:13,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447088688] [2021-05-03 15:51:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:14,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447088688] [2021-05-03 15:51:14,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901067778] [2021-05-03 15:51:14,004 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 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 [2021-05-03 15:51:14,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:51:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:14,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:14,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:14,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:14,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:14,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:14,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:14,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:14,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-05-03 15:51:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104532878] [2021-05-03 15:51:14,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:51:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:51:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:51:14,526 INFO L87 Difference]: Start difference. First operand 725 states and 1431 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:15,119 INFO L93 Difference]: Finished difference Result 1274 states and 2549 transitions. [2021-05-03 15:51:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:51:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:15,121 INFO L225 Difference]: With dead ends: 1274 [2021-05-03 15:51:15,121 INFO L226 Difference]: Without dead ends: 1253 [2021-05-03 15:51:15,122 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:51:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-05-03 15:51:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 725. [2021-05-03 15:51:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.9765193370165746) internal successors, (1431), 724 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1431 transitions. [2021-05-03 15:51:15,133 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1431 transitions. Word has length 35 [2021-05-03 15:51:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:15,133 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 1431 transitions. [2021-05-03 15:51:15,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1431 transitions. [2021-05-03 15:51:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:15,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:15,134 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:15,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 15:51:15,335 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-05-03 15:51:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:15,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656664540] [2021-05-03 15:51:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656664540] [2021-05-03 15:51:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274712933] [2021-05-03 15:51:15,648 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 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 [2021-05-03 15:51:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:15,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:16,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:16,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:16,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:16,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:16,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:16,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:16,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:16,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-05-03 15:51:16,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616171795] [2021-05-03 15:51:16,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:51:16,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:51:16,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:51:16,135 INFO L87 Difference]: Start difference. First operand 725 states and 1431 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:16,778 INFO L93 Difference]: Finished difference Result 1554 states and 3091 transitions. [2021-05-03 15:51:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:51:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:16,781 INFO L225 Difference]: With dead ends: 1554 [2021-05-03 15:51:16,781 INFO L226 Difference]: Without dead ends: 1324 [2021-05-03 15:51:16,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-05-03 15:51:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 883. [2021-05-03 15:51:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.9648526077097506) internal successors, (1733), 882 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1733 transitions. [2021-05-03 15:51:16,798 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1733 transitions. Word has length 35 [2021-05-03 15:51:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:16,798 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 1733 transitions. [2021-05-03 15:51:16,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1733 transitions. [2021-05-03 15:51:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:16,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:16,800 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:17,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 15:51:17,009 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-05-03 15:51:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:17,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804806347] [2021-05-03 15:51:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:51:17,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804806347] [2021-05-03 15:51:17,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555471576] [2021-05-03 15:51:17,213 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:17,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:51:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:17,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:17,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:17,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:17,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:17,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:17,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:17,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-05-03 15:51:17,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358695521] [2021-05-03 15:51:17,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:51:17,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:51:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:51:17,675 INFO L87 Difference]: Start difference. First operand 883 states and 1733 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:18,465 INFO L93 Difference]: Finished difference Result 1776 states and 3573 transitions. [2021-05-03 15:51:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:51:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:18,474 INFO L225 Difference]: With dead ends: 1776 [2021-05-03 15:51:18,474 INFO L226 Difference]: Without dead ends: 1578 [2021-05-03 15:51:18,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 740.0ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:51:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-05-03 15:51:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 916. [2021-05-03 15:51:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.9693989071038251) internal successors, (1802), 915 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1802 transitions. [2021-05-03 15:51:18,495 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1802 transitions. Word has length 35 [2021-05-03 15:51:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:18,495 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 1802 transitions. [2021-05-03 15:51:18,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1802 transitions. [2021-05-03 15:51:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:18,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:18,497 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:18,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 15:51:18,716 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:18,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:18,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-05-03 15:51:18,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:18,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120680496] [2021-05-03 15:51:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:18,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120680496] [2021-05-03 15:51:18,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565101456] [2021-05-03 15:51:18,949 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:18,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:51:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:18,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-03 15:51:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:19,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:19,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:19,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:19,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:19,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:19,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 20 [2021-05-03 15:51:19,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381689620] [2021-05-03 15:51:19,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:51:19,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:19,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:51:19,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:51:19,384 INFO L87 Difference]: Start difference. First operand 916 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:19,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:19,804 INFO L93 Difference]: Finished difference Result 1857 states and 3665 transitions. [2021-05-03 15:51:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:51:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:19,819 INFO L225 Difference]: With dead ends: 1857 [2021-05-03 15:51:19,819 INFO L226 Difference]: Without dead ends: 1654 [2021-05-03 15:51:19,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 507.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:51:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-05-03 15:51:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1024. [2021-05-03 15:51:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.9736070381231672) internal successors, (2019), 1023 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2019 transitions. [2021-05-03 15:51:19,838 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2019 transitions. Word has length 35 [2021-05-03 15:51:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:19,838 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 2019 transitions. [2021-05-03 15:51:19,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2019 transitions. [2021-05-03 15:51:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:19,840 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:19,840 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:20,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:20,060 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-05-03 15:51:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:20,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088951610] [2021-05-03 15:51:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:20,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088951610] [2021-05-03 15:51:20,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756074134] [2021-05-03 15:51:20,311 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 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 [2021-05-03 15:51:20,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:51:20,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:20,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:20,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:20,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:20,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:20,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:20,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:20,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:20,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 15:51:20,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070768891] [2021-05-03 15:51:20,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:51:20,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:51:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:51:20,802 INFO L87 Difference]: Start difference. First operand 1024 states and 2019 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:21,393 INFO L93 Difference]: Finished difference Result 1930 states and 3966 transitions. [2021-05-03 15:51:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:51:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:21,398 INFO L225 Difference]: With dead ends: 1930 [2021-05-03 15:51:21,398 INFO L226 Difference]: Without dead ends: 1811 [2021-05-03 15:51:21,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:51:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-05-03 15:51:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1039. [2021-05-03 15:51:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.97495183044316) internal successors, (2050), 1038 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2050 transitions. [2021-05-03 15:51:21,420 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2050 transitions. Word has length 35 [2021-05-03 15:51:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:21,420 INFO L480 AbstractCegarLoop]: Abstraction has 1039 states and 2050 transitions. [2021-05-03 15:51:21,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2050 transitions. [2021-05-03 15:51:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:21,422 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:21,422 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:21,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:21,636 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-05-03 15:51:21,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:21,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530616033] [2021-05-03 15:51:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:21,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530616033] [2021-05-03 15:51:21,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079581898] [2021-05-03 15:51:21,876 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 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 [2021-05-03 15:51:22,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:51:22,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:22,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-03 15:51:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:22,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:22,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-05-03 15:51:22,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:22,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:22,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:22,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:118, output treesize:7 [2021-05-03 15:51:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:22,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:22,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-05-03 15:51:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173245998] [2021-05-03 15:51:22,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:51:22,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:51:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:51:22,998 INFO L87 Difference]: Start difference. First operand 1039 states and 2050 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:24,561 INFO L93 Difference]: Finished difference Result 1874 states and 3755 transitions. [2021-05-03 15:51:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:51:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:24,565 INFO L225 Difference]: With dead ends: 1874 [2021-05-03 15:51:24,565 INFO L226 Difference]: Without dead ends: 1685 [2021-05-03 15:51:24,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1376.3ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:51:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-05-03 15:51:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1110. [2021-05-03 15:51:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 1.9810640216411182) internal successors, (2197), 1109 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 2197 transitions. [2021-05-03 15:51:24,587 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 2197 transitions. Word has length 35 [2021-05-03 15:51:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:24,587 INFO L480 AbstractCegarLoop]: Abstraction has 1110 states and 2197 transitions. [2021-05-03 15:51:24,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 2197 transitions. [2021-05-03 15:51:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:24,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:24,589 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:24,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 15:51:24,805 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-05-03 15:51:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:24,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937698849] [2021-05-03 15:51:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:25,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937698849] [2021-05-03 15:51:25,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661318242] [2021-05-03 15:51:25,135 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:25,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:51:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:25,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:25,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:25,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:25,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:25,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:25,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:25,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-05-03 15:51:25,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700283513] [2021-05-03 15:51:25,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:51:25,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:51:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:51:25,699 INFO L87 Difference]: Start difference. First operand 1110 states and 2197 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:26,126 INFO L93 Difference]: Finished difference Result 2082 states and 4220 transitions. [2021-05-03 15:51:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:51:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:26,136 INFO L225 Difference]: With dead ends: 2082 [2021-05-03 15:51:26,136 INFO L226 Difference]: Without dead ends: 2022 [2021-05-03 15:51:26,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:51:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-05-03 15:51:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1077. [2021-05-03 15:51:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.9767657992565055) internal successors, (2127), 1076 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2127 transitions. [2021-05-03 15:51:26,167 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2127 transitions. Word has length 35 [2021-05-03 15:51:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:26,167 INFO L480 AbstractCegarLoop]: Abstraction has 1077 states and 2127 transitions. [2021-05-03 15:51:26,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2127 transitions. [2021-05-03 15:51:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:26,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:26,169 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:26,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:26,385 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-05-03 15:51:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:26,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943234043] [2021-05-03 15:51:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:26,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943234043] [2021-05-03 15:51:26,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040793708] [2021-05-03 15:51:26,717 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 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 [2021-05-03 15:51:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:26,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:27,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:27,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:27,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:27,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:27,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:27,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:27,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-05-03 15:51:27,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447188022] [2021-05-03 15:51:27,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:51:27,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:27,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:51:27,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:51:27,174 INFO L87 Difference]: Start difference. First operand 1077 states and 2127 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:27,660 INFO L93 Difference]: Finished difference Result 1881 states and 3805 transitions. [2021-05-03 15:51:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:51:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:51:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:27,665 INFO L225 Difference]: With dead ends: 1881 [2021-05-03 15:51:27,665 INFO L226 Difference]: Without dead ends: 1825 [2021-05-03 15:51:27,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:51:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-05-03 15:51:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1077. [2021-05-03 15:51:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.9767657992565055) internal successors, (2127), 1076 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2127 transitions. [2021-05-03 15:51:27,685 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2127 transitions. Word has length 35 [2021-05-03 15:51:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:27,686 INFO L480 AbstractCegarLoop]: Abstraction has 1077 states and 2127 transitions. [2021-05-03 15:51:27,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2127 transitions. [2021-05-03 15:51:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:51:27,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:27,688 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:27,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 15:51:27,901 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-05-03 15:51:27,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:27,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340980866] [2021-05-03 15:51:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:28,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340980866] [2021-05-03 15:51:28,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174268290] [2021-05-03 15:51:28,198 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 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 [2021-05-03 15:51:28,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:51:28,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:28,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:28,591 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-05-03 15:51:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:28,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:28,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:28,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:28,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-05-03 15:51:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:28,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:28,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-05-03 15:51:28,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581551913] [2021-05-03 15:51:28,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:51:28,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:51:28,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:51:28,616 INFO L87 Difference]: Start difference. First operand 1077 states and 2127 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-03 15:51:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:29,085 INFO L93 Difference]: Finished difference Result 1518 states and 3021 transitions. [2021-05-03 15:51:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:51:29,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 35 [2021-05-03 15:51:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:29,089 INFO L225 Difference]: With dead ends: 1518 [2021-05-03 15:51:29,089 INFO L226 Difference]: Without dead ends: 1503 [2021-05-03 15:51:29,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:51:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-05-03 15:51:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1084. [2021-05-03 15:51:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 1.9778393351800554) internal successors, (2142), 1083 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2142 transitions. [2021-05-03 15:51:29,108 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2142 transitions. Word has length 35 [2021-05-03 15:51:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:29,108 INFO L480 AbstractCegarLoop]: Abstraction has 1084 states and 2142 transitions. [2021-05-03 15:51:29,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-05-03 15:51:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2142 transitions. [2021-05-03 15:51:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:51:29,110 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:29,110 INFO L551 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:29,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 15:51:29,323 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-05-03 15:51:29,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:29,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189435671] [2021-05-03 15:51:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189435671] [2021-05-03 15:51:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171520718] [2021-05-03 15:51:29,391 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 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 [2021-05-03 15:51:29,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:51:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 15:51:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:29,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:29,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 15:51:29,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436531304] [2021-05-03 15:51:29,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:51:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:29,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:51:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:51:29,528 INFO L87 Difference]: Start difference. First operand 1084 states and 2142 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:29,572 INFO L93 Difference]: Finished difference Result 1409 states and 2796 transitions. [2021-05-03 15:51:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:51:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:51:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:29,575 INFO L225 Difference]: With dead ends: 1409 [2021-05-03 15:51:29,576 INFO L226 Difference]: Without dead ends: 1402 [2021-05-03 15:51:29,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:51:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-05-03 15:51:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1133. [2021-05-03 15:51:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 1.9902826855123674) internal successors, (2253), 1132 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2253 transitions. [2021-05-03 15:51:29,600 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2253 transitions. Word has length 36 [2021-05-03 15:51:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:29,600 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 2253 transitions. [2021-05-03 15:51:29,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2253 transitions. [2021-05-03 15:51:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 15:51:29,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:29,603 INFO L551 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:29,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 15:51:29,810 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-05-03 15:51:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:29,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082934264] [2021-05-03 15:51:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:30,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082934264] [2021-05-03 15:51:30,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779440405] [2021-05-03 15:51:30,028 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 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 [2021-05-03 15:51:30,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:51:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:30,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:51:30,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:30,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:30,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:30,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-05-03 15:51:30,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:30,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:30,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:30,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-05-03 15:51:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:30,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:30,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-05-03 15:51:30,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726450923] [2021-05-03 15:51:30,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:51:30,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:51:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:51:30,526 INFO L87 Difference]: Start difference. First operand 1133 states and 2253 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-05-03 15:51:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:31,427 INFO L93 Difference]: Finished difference Result 2709 states and 5525 transitions. [2021-05-03 15:51:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:51:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 38 [2021-05-03 15:51:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:31,431 INFO L225 Difference]: With dead ends: 2709 [2021-05-03 15:51:31,432 INFO L226 Difference]: Without dead ends: 2389 [2021-05-03 15:51:31,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1037.9ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-05-03 15:51:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1227. [2021-05-03 15:51:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.9893964110929854) internal successors, (2439), 1226 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 2439 transitions. [2021-05-03 15:51:31,455 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 2439 transitions. Word has length 38 [2021-05-03 15:51:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:31,455 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 2439 transitions. [2021-05-03 15:51:31,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-05-03 15:51:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 2439 transitions. [2021-05-03 15:51:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:31,462 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:31,463 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:31,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 15:51:31,665 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-05-03 15:51:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:31,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187487820] [2021-05-03 15:51:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:31,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187487820] [2021-05-03 15:51:31,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324790774] [2021-05-03 15:51:31,924 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 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 [2021-05-03 15:51:31,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:51:31,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:31,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-03 15:51:31,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:32,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:32,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:32,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:32,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-05-03 15:51:32,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:32,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:32,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:32,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-05-03 15:51:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:32,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:32,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-03 15:51:32,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85762915] [2021-05-03 15:51:32,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:51:32,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:51:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:32,681 INFO L87 Difference]: Start difference. First operand 1227 states and 2439 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:33,149 INFO L93 Difference]: Finished difference Result 2615 states and 5316 transitions. [2021-05-03 15:51:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:51:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-05-03 15:51:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:33,154 INFO L225 Difference]: With dead ends: 2615 [2021-05-03 15:51:33,154 INFO L226 Difference]: Without dead ends: 2400 [2021-05-03 15:51:33,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-05-03 15:51:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1257. [2021-05-03 15:51:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.982484076433121) internal successors, (2490), 1256 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2490 transitions. [2021-05-03 15:51:33,180 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2490 transitions. Word has length 39 [2021-05-03 15:51:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:33,181 INFO L480 AbstractCegarLoop]: Abstraction has 1257 states and 2490 transitions. [2021-05-03 15:51:33,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2490 transitions. [2021-05-03 15:51:33,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:33,183 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:33,183 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:33,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:33,404 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:33,404 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-05-03 15:51:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:33,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790352943] [2021-05-03 15:51:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:33,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790352943] [2021-05-03 15:51:33,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314909735] [2021-05-03 15:51:33,775 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 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 [2021-05-03 15:51:33,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:51:33,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:33,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:34,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:34,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:34,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:34,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:34,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:34,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:34,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:34,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-03 15:51:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336433501] [2021-05-03 15:51:34,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:51:34,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:51:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:34,581 INFO L87 Difference]: Start difference. First operand 1257 states and 2490 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:35,165 INFO L93 Difference]: Finished difference Result 2116 states and 4241 transitions. [2021-05-03 15:51:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:51:35,166 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-05-03 15:51:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:35,169 INFO L225 Difference]: With dead ends: 2116 [2021-05-03 15:51:35,170 INFO L226 Difference]: Without dead ends: 2095 [2021-05-03 15:51:35,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 894.8ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-05-03 15:51:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1269. [2021-05-03 15:51:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 1.9834384858044165) internal successors, (2515), 1268 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 2515 transitions. [2021-05-03 15:51:35,191 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 2515 transitions. Word has length 39 [2021-05-03 15:51:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:35,191 INFO L480 AbstractCegarLoop]: Abstraction has 1269 states and 2515 transitions. [2021-05-03 15:51:35,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 2515 transitions. [2021-05-03 15:51:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:35,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:35,194 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:35,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 15:51:35,394 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-05-03 15:51:35,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:35,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611637429] [2021-05-03 15:51:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:35,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611637429] [2021-05-03 15:51:35,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219023128] [2021-05-03 15:51:35,635 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 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 [2021-05-03 15:51:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:35,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:36,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:36,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:36,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:36,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:36,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:36,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:36,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:36,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:36,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:36,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:36,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-05-03 15:51:36,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534731702] [2021-05-03 15:51:36,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:51:36,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:51:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:51:36,359 INFO L87 Difference]: Start difference. First operand 1269 states and 2515 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2021-05-03 15:51:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:37,339 INFO L93 Difference]: Finished difference Result 2211 states and 4407 transitions. [2021-05-03 15:51:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:51:37,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 39 [2021-05-03 15:51:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:37,344 INFO L225 Difference]: With dead ends: 2211 [2021-05-03 15:51:37,344 INFO L226 Difference]: Without dead ends: 1920 [2021-05-03 15:51:37,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1143.9ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:51:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-05-03 15:51:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1305. [2021-05-03 15:51:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 1.9639570552147239) internal successors, (2561), 1304 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2561 transitions. [2021-05-03 15:51:37,375 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2561 transitions. Word has length 39 [2021-05-03 15:51:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:37,375 INFO L480 AbstractCegarLoop]: Abstraction has 1305 states and 2561 transitions. [2021-05-03 15:51:37,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2021-05-03 15:51:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2561 transitions. [2021-05-03 15:51:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:37,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:37,377 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:37,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:37,600 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:37,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-05-03 15:51:37,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:37,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891189860] [2021-05-03 15:51:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:37,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891189860] [2021-05-03 15:51:37,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748387380] [2021-05-03 15:51:37,981 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 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 [2021-05-03 15:51:38,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:51:38,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:38,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:38,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:38,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:38,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:38,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:38,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:38,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:38,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:38,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:38,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:38,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:38,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-03 15:51:38,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326148415] [2021-05-03 15:51:38,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:51:38,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:51:38,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:38,818 INFO L87 Difference]: Start difference. First operand 1305 states and 2561 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:39,245 INFO L93 Difference]: Finished difference Result 2919 states and 5977 transitions. [2021-05-03 15:51:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:51:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-05-03 15:51:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:39,260 INFO L225 Difference]: With dead ends: 2919 [2021-05-03 15:51:39,261 INFO L226 Difference]: Without dead ends: 2786 [2021-05-03 15:51:39,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 981.4ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-05-03 15:51:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1038. [2021-05-03 15:51:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.99228543876567) internal successors, (2066), 1037 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2066 transitions. [2021-05-03 15:51:39,288 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2066 transitions. Word has length 39 [2021-05-03 15:51:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:39,288 INFO L480 AbstractCegarLoop]: Abstraction has 1038 states and 2066 transitions. [2021-05-03 15:51:39,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2066 transitions. [2021-05-03 15:51:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:39,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:39,291 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:39,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-03 15:51:39,492 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-05-03 15:51:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:39,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585200060] [2021-05-03 15:51:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:39,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585200060] [2021-05-03 15:51:39,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233820578] [2021-05-03 15:51:39,777 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:39,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:51:39,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:39,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:40,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:40,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:40,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:40,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:40,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:40,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:40,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:40,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:40,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:40,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-03 15:51:40,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601707065] [2021-05-03 15:51:40,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:51:40,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:51:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:40,678 INFO L87 Difference]: Start difference. First operand 1038 states and 2066 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:41,323 INFO L93 Difference]: Finished difference Result 2234 states and 4496 transitions. [2021-05-03 15:51:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:51:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-05-03 15:51:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:41,328 INFO L225 Difference]: With dead ends: 2234 [2021-05-03 15:51:41,328 INFO L226 Difference]: Without dead ends: 2208 [2021-05-03 15:51:41,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-05-03 15:51:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1107. [2021-05-03 15:51:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 1.9819168173598554) internal successors, (2192), 1106 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 2192 transitions. [2021-05-03 15:51:41,352 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 2192 transitions. Word has length 39 [2021-05-03 15:51:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:41,352 INFO L480 AbstractCegarLoop]: Abstraction has 1107 states and 2192 transitions. [2021-05-03 15:51:41,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 2192 transitions. [2021-05-03 15:51:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:41,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:41,354 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:41,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:41,576 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-05-03 15:51:41,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:41,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855638589] [2021-05-03 15:51:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:41,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855638589] [2021-05-03 15:51:41,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857945197] [2021-05-03 15:51:41,959 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 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 [2021-05-03 15:51:41,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:51:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:41,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:42,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:42,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:42,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:42,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:42,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:42,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:42,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:42,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-05-03 15:51:42,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893583960] [2021-05-03 15:51:42,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:51:42,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:42,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:51:42,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:42,901 INFO L87 Difference]: Start difference. First operand 1107 states and 2192 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:43,527 INFO L93 Difference]: Finished difference Result 2416 states and 4910 transitions. [2021-05-03 15:51:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:51:43,528 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-05-03 15:51:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:43,532 INFO L225 Difference]: With dead ends: 2416 [2021-05-03 15:51:43,533 INFO L226 Difference]: Without dead ends: 2350 [2021-05-03 15:51:43,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-05-03 15:51:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1011. [2021-05-03 15:51:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.995049504950495) internal successors, (2015), 1010 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2015 transitions. [2021-05-03 15:51:43,558 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2015 transitions. Word has length 39 [2021-05-03 15:51:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:43,558 INFO L480 AbstractCegarLoop]: Abstraction has 1011 states and 2015 transitions. [2021-05-03 15:51:43,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2015 transitions. [2021-05-03 15:51:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:43,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:43,560 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:43,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 15:51:43,782 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-05-03 15:51:43,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:43,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629445986] [2021-05-03 15:51:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:44,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629445986] [2021-05-03 15:51:44,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086395384] [2021-05-03 15:51:44,273 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 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 [2021-05-03 15:51:44,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:51:44,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:44,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-03 15:51:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:45,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:45,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-05-03 15:51:45,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:45,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:45,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:45,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-05-03 15:51:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:45,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:45,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-05-03 15:51:45,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104234764] [2021-05-03 15:51:45,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:51:45,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:51:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:45,095 INFO L87 Difference]: Start difference. First operand 1011 states and 2015 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:46,009 INFO L93 Difference]: Finished difference Result 1526 states and 3054 transitions. [2021-05-03 15:51:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:51:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-05-03 15:51:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:46,012 INFO L225 Difference]: With dead ends: 1526 [2021-05-03 15:51:46,013 INFO L226 Difference]: Without dead ends: 1500 [2021-05-03 15:51:46,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1329.8ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:51:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-05-03 15:51:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1113. [2021-05-03 15:51:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 1.9820143884892085) internal successors, (2204), 1112 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2204 transitions. [2021-05-03 15:51:46,030 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2204 transitions. Word has length 39 [2021-05-03 15:51:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:46,030 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2204 transitions. [2021-05-03 15:51:46,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2204 transitions. [2021-05-03 15:51:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:46,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:46,031 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:46,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:46,232 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 60 times [2021-05-03 15:51:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:46,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555280653] [2021-05-03 15:51:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:46,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555280653] [2021-05-03 15:51:46,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943261453] [2021-05-03 15:51:46,553 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 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 [2021-05-03 15:51:46,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 15:51:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:46,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-03 15:51:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:47,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:47,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:47,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:47,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:47,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:47,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:47,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-05-03 15:51:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146937334] [2021-05-03 15:51:47,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:51:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:51:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:51:47,349 INFO L87 Difference]: Start difference. First operand 1113 states and 2204 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-05-03 15:51:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:48,493 INFO L93 Difference]: Finished difference Result 1961 states and 3901 transitions. [2021-05-03 15:51:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:51:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 39 [2021-05-03 15:51:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:48,500 INFO L225 Difference]: With dead ends: 1961 [2021-05-03 15:51:48,500 INFO L226 Difference]: Without dead ends: 1676 [2021-05-03 15:51:48,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1256.5ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:51:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-05-03 15:51:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1044. [2021-05-03 15:51:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 1.9769894534995207) internal successors, (2062), 1043 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2062 transitions. [2021-05-03 15:51:48,527 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2062 transitions. Word has length 39 [2021-05-03 15:51:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:48,528 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 2062 transitions. [2021-05-03 15:51:48,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-05-03 15:51:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2062 transitions. [2021-05-03 15:51:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:48,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:48,531 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:48,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 15:51:48,745 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 61 times [2021-05-03 15:51:48,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:48,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363465376] [2021-05-03 15:51:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:49,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363465376] [2021-05-03 15:51:49,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666929665] [2021-05-03 15:51:49,103 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:49,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:49,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:49,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:49,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:49,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:49,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:49,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:49,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:49,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:49,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-05-03 15:51:49,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490326284] [2021-05-03 15:51:49,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:51:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:51:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:49,996 INFO L87 Difference]: Start difference. First operand 1044 states and 2062 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:50,537 INFO L93 Difference]: Finished difference Result 2127 states and 4398 transitions. [2021-05-03 15:51:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:51:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-05-03 15:51:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:50,555 INFO L225 Difference]: With dead ends: 2127 [2021-05-03 15:51:50,556 INFO L226 Difference]: Without dead ends: 2008 [2021-05-03 15:51:50,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 969.4ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-05-03 15:51:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1050. [2021-05-03 15:51:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.977121067683508) internal successors, (2074), 1049 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2074 transitions. [2021-05-03 15:51:50,585 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2074 transitions. Word has length 39 [2021-05-03 15:51:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:50,585 INFO L480 AbstractCegarLoop]: Abstraction has 1050 states and 2074 transitions. [2021-05-03 15:51:50,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2074 transitions. [2021-05-03 15:51:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:50,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:50,590 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:50,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:50,797 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 62 times [2021-05-03 15:51:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:50,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033719712] [2021-05-03 15:51:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033719712] [2021-05-03 15:51:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760129468] [2021-05-03 15:51:51,151 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 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 [2021-05-03 15:51:51,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:51:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:51,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:51,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:51,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:52,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:52,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:52,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:52,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:52,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:52,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:52,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:52,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:52,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-05-03 15:51:52,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171838584] [2021-05-03 15:51:52,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:51:52,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:51:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:51:52,037 INFO L87 Difference]: Start difference. First operand 1050 states and 2074 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-05-03 15:51:52,727 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-05-03 15:51:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:52,781 INFO L93 Difference]: Finished difference Result 1944 states and 3895 transitions. [2021-05-03 15:51:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:51:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 39 [2021-05-03 15:51:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:52,784 INFO L225 Difference]: With dead ends: 1944 [2021-05-03 15:51:52,784 INFO L226 Difference]: Without dead ends: 1717 [2021-05-03 15:51:52,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1159.3ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-05-03 15:51:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1155. [2021-05-03 15:51:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9705372616984402) internal successors, (2274), 1154 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2274 transitions. [2021-05-03 15:51:52,802 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2274 transitions. Word has length 39 [2021-05-03 15:51:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:52,802 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 2274 transitions. [2021-05-03 15:51:52,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-05-03 15:51:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2274 transitions. [2021-05-03 15:51:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:52,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:52,804 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:53,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 15:51:53,025 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 63 times [2021-05-03 15:51:53,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:53,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550920839] [2021-05-03 15:51:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:53,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550920839] [2021-05-03 15:51:53,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186212211] [2021-05-03 15:51:53,374 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 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 [2021-05-03 15:51:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 15:51:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:53,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-03 15:51:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:54,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-05-03 15:51:54,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:54,246 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-05-03 15:51:54,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:54,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:142, output treesize:7 [2021-05-03 15:51:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:54,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:54,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-03 15:51:54,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304165254] [2021-05-03 15:51:54,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:51:54,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:51:54,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:51:54,260 INFO L87 Difference]: Start difference. First operand 1155 states and 2274 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:54,823 INFO L93 Difference]: Finished difference Result 2616 states and 5278 transitions. [2021-05-03 15:51:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:51:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-05-03 15:51:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:54,827 INFO L225 Difference]: With dead ends: 2616 [2021-05-03 15:51:54,827 INFO L226 Difference]: Without dead ends: 2378 [2021-05-03 15:51:54,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1044.9ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-05-03 15:51:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1137. [2021-05-03 15:51:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.965669014084507) internal successors, (2233), 1136 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2233 transitions. [2021-05-03 15:51:54,849 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2233 transitions. Word has length 39 [2021-05-03 15:51:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 2233 transitions. [2021-05-03 15:51:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-03 15:51:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2233 transitions. [2021-05-03 15:51:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:54,851 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:54,851 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:55,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 15:51:55,073 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 64 times [2021-05-03 15:51:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:55,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561399816] [2021-05-03 15:51:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:55,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561399816] [2021-05-03 15:51:55,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705310521] [2021-05-03 15:51:55,415 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:51:55,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:51:55,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:55,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:56,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:56,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:56,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:56,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:56,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:56,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:56,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:56,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:56,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:56,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-05-03 15:51:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001789365] [2021-05-03 15:51:56,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:51:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:56,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:51:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:56,280 INFO L87 Difference]: Start difference. First operand 1137 states and 2233 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:56,802 INFO L93 Difference]: Finished difference Result 2156 states and 4367 transitions. [2021-05-03 15:51:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:51:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-05-03 15:51:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:56,806 INFO L225 Difference]: With dead ends: 2156 [2021-05-03 15:51:56,806 INFO L226 Difference]: Without dead ends: 2100 [2021-05-03 15:51:56,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 947.6ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-05-03 15:51:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1143. [2021-05-03 15:51:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 1.9658493870402802) internal successors, (2245), 1142 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2245 transitions. [2021-05-03 15:51:56,825 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2245 transitions. Word has length 39 [2021-05-03 15:51:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:56,825 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2245 transitions. [2021-05-03 15:51:56,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2245 transitions. [2021-05-03 15:51:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:56,827 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:56,827 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:57,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 15:51:57,027 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:57,028 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 65 times [2021-05-03 15:51:57,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:57,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542710792] [2021-05-03 15:51:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542710792] [2021-05-03 15:51:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937851293] [2021-05-03 15:51:57,382 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 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 [2021-05-03 15:51:57,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:51:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:57,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:51:58,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:58,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:58,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:51:58,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:51:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:51:58,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:51:58,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:51:58,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:51:58,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:51:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:58,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:51:58,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-05-03 15:51:58,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019348358] [2021-05-03 15:51:58,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:51:58,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:51:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:51:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:58,281 INFO L87 Difference]: Start difference. First operand 1143 states and 2245 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:51:59,265 INFO L93 Difference]: Finished difference Result 1725 states and 3447 transitions. [2021-05-03 15:51:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:51:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-05-03 15:51:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:51:59,269 INFO L225 Difference]: With dead ends: 1725 [2021-05-03 15:51:59,269 INFO L226 Difference]: Without dead ends: 1703 [2021-05-03 15:51:59,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:51:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-05-03 15:51:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1146. [2021-05-03 15:51:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 1.965938864628821) internal successors, (2251), 1145 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:51:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2251 transitions. [2021-05-03 15:51:59,300 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2251 transitions. Word has length 39 [2021-05-03 15:51:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:51:59,300 INFO L480 AbstractCegarLoop]: Abstraction has 1146 states and 2251 transitions. [2021-05-03 15:51:59,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-03 15:51:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2251 transitions. [2021-05-03 15:51:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:51:59,302 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:51:59,302 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:51:59,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:51:59,512 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:51:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:51:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 66 times [2021-05-03 15:51:59,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:51:59,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921378070] [2021-05-03 15:51:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:51:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:51:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:51:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921378070] [2021-05-03 15:51:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680715118] [2021-05-03 15:51:59,911 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 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 [2021-05-03 15:51:59,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:51:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:51:59,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:51:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:00,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:00,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:00,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:00,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:00,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:00,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:00,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:00,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:00,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-05-03 15:52:00,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353153471] [2021-05-03 15:52:00,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:52:00,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:52:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:52:00,757 INFO L87 Difference]: Start difference. First operand 1146 states and 2251 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:01,751 INFO L93 Difference]: Finished difference Result 2894 states and 5954 transitions. [2021-05-03 15:52:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:01,752 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:01,756 INFO L225 Difference]: With dead ends: 2894 [2021-05-03 15:52:01,756 INFO L226 Difference]: Without dead ends: 2754 [2021-05-03 15:52:01,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 966.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:52:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-05-03 15:52:01,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 633. [2021-05-03 15:52:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.0522151898734178) internal successors, (1297), 632 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1297 transitions. [2021-05-03 15:52:01,771 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1297 transitions. Word has length 39 [2021-05-03 15:52:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:01,772 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1297 transitions. [2021-05-03 15:52:01,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1297 transitions. [2021-05-03 15:52:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:01,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:01,773 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:01,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:01,973 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 67 times [2021-05-03 15:52:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:01,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496270152] [2021-05-03 15:52:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:02,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496270152] [2021-05-03 15:52:02,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871164960] [2021-05-03 15:52:02,372 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 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 [2021-05-03 15:52:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:02,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:02,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:03,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:03,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:03,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:03,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:03,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:03,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:03,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-05-03 15:52:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896139529] [2021-05-03 15:52:03,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:52:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:52:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:52:03,258 INFO L87 Difference]: Start difference. First operand 633 states and 1297 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:04,652 INFO L93 Difference]: Finished difference Result 1914 states and 3966 transitions. [2021-05-03 15:52:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:04,660 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:04,663 INFO L225 Difference]: With dead ends: 1914 [2021-05-03 15:52:04,663 INFO L226 Difference]: Without dead ends: 1853 [2021-05-03 15:52:04,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1016.6ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:52:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-05-03 15:52:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 648. [2021-05-03 15:52:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.041731066460587) internal successors, (1321), 647 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1321 transitions. [2021-05-03 15:52:04,679 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1321 transitions. Word has length 39 [2021-05-03 15:52:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:04,679 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1321 transitions. [2021-05-03 15:52:04,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1321 transitions. [2021-05-03 15:52:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:04,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:04,680 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:04,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:04,889 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 68 times [2021-05-03 15:52:04,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:04,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560678354] [2021-05-03 15:52:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:05,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560678354] [2021-05-03 15:52:05,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437421755] [2021-05-03 15:52:05,299 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 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 [2021-05-03 15:52:05,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:52:05,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:05,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:06,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:06,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:06,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:06,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:06,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:06,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-05-03 15:52:06,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668033380] [2021-05-03 15:52:06,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:52:06,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:52:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:52:06,290 INFO L87 Difference]: Start difference. First operand 648 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:07,339 INFO L93 Difference]: Finished difference Result 1650 states and 3430 transitions. [2021-05-03 15:52:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:07,343 INFO L225 Difference]: With dead ends: 1650 [2021-05-03 15:52:07,343 INFO L226 Difference]: Without dead ends: 1586 [2021-05-03 15:52:07,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:52:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-05-03 15:52:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 630. [2021-05-03 15:52:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.0524642289348174) internal successors, (1291), 629 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1291 transitions. [2021-05-03 15:52:07,355 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1291 transitions. Word has length 39 [2021-05-03 15:52:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:07,355 INFO L480 AbstractCegarLoop]: Abstraction has 630 states and 1291 transitions. [2021-05-03 15:52:07,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1291 transitions. [2021-05-03 15:52:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:07,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:07,356 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:07,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 15:52:07,557 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 69 times [2021-05-03 15:52:07,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:07,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773711788] [2021-05-03 15:52:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:07,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773711788] [2021-05-03 15:52:07,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138255343] [2021-05-03 15:52:07,899 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 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 [2021-05-03 15:52:07,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:52:07,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:07,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-03 15:52:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:09,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:09,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:09,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:09,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:09,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 48 [2021-05-03 15:52:09,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:09,111 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-05-03 15:52:09,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:09,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:140, output treesize:7 [2021-05-03 15:52:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:09,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:09,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-05-03 15:52:09,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060308740] [2021-05-03 15:52:09,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:52:09,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:52:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:52:09,127 INFO L87 Difference]: Start difference. First operand 630 states and 1291 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:11,480 INFO L93 Difference]: Finished difference Result 1483 states and 2977 transitions. [2021-05-03 15:52:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:52:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:11,482 INFO L225 Difference]: With dead ends: 1483 [2021-05-03 15:52:11,482 INFO L226 Difference]: Without dead ends: 1180 [2021-05-03 15:52:11,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2181.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:52:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-05-03 15:52:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 723. [2021-05-03 15:52:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.0373961218836567) internal successors, (1471), 722 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1471 transitions. [2021-05-03 15:52:11,491 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1471 transitions. Word has length 39 [2021-05-03 15:52:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:11,491 INFO L480 AbstractCegarLoop]: Abstraction has 723 states and 1471 transitions. [2021-05-03 15:52:11,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1471 transitions. [2021-05-03 15:52:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:11,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:11,492 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:11,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:11,693 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 70 times [2021-05-03 15:52:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:11,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904944239] [2021-05-03 15:52:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:11,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904944239] [2021-05-03 15:52:11,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482061385] [2021-05-03 15:52:11,993 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 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 [2021-05-03 15:52:12,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:52:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:12,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:12,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:12,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:12,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:12,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:12,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:12,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:12,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-05-03 15:52:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017109926] [2021-05-03 15:52:12,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:52:12,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:52:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:52:12,565 INFO L87 Difference]: Start difference. First operand 723 states and 1471 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:13,099 INFO L93 Difference]: Finished difference Result 2073 states and 4358 transitions. [2021-05-03 15:52:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:52:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:13,103 INFO L225 Difference]: With dead ends: 2073 [2021-05-03 15:52:13,103 INFO L226 Difference]: Without dead ends: 1942 [2021-05-03 15:52:13,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 682.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:52:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-05-03 15:52:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 756. [2021-05-03 15:52:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.0357615894039736) internal successors, (1537), 755 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1537 transitions. [2021-05-03 15:52:13,118 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1537 transitions. Word has length 39 [2021-05-03 15:52:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:13,118 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 1537 transitions. [2021-05-03 15:52:13,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1537 transitions. [2021-05-03 15:52:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:13,119 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:13,119 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:13,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:13,321 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 71 times [2021-05-03 15:52:13,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635692936] [2021-05-03 15:52:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:13,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635692936] [2021-05-03 15:52:13,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341893544] [2021-05-03 15:52:13,749 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 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 [2021-05-03 15:52:13,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:52:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:13,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-03 15:52:13,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:14,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:14,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:14,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:14,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:14,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:14,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:14,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:14,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:14,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:14,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-05-03 15:52:14,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226118556] [2021-05-03 15:52:14,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:52:14,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:14,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:52:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:52:14,599 INFO L87 Difference]: Start difference. First operand 756 states and 1537 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:15,429 INFO L93 Difference]: Finished difference Result 1332 states and 2723 transitions. [2021-05-03 15:52:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:52:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:15,432 INFO L225 Difference]: With dead ends: 1332 [2021-05-03 15:52:15,432 INFO L226 Difference]: Without dead ends: 1301 [2021-05-03 15:52:15,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1019.2ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:52:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-05-03 15:52:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 759. [2021-05-03 15:52:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.0356200527704487) internal successors, (1543), 758 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1543 transitions. [2021-05-03 15:52:15,443 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1543 transitions. Word has length 39 [2021-05-03 15:52:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:15,443 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 1543 transitions. [2021-05-03 15:52:15,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1543 transitions. [2021-05-03 15:52:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:15,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:15,444 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:15,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:15,644 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 72 times [2021-05-03 15:52:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:15,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265316018] [2021-05-03 15:52:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265316018] [2021-05-03 15:52:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878358358] [2021-05-03 15:52:16,038 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 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 [2021-05-03 15:52:16,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:52:16,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:16,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:16,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:16,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:16,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:16,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:16,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:16,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:16,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:16,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-05-03 15:52:16,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14085416] [2021-05-03 15:52:16,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:52:16,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:52:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:52:16,837 INFO L87 Difference]: Start difference. First operand 759 states and 1543 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:17,574 INFO L93 Difference]: Finished difference Result 1790 states and 3676 transitions. [2021-05-03 15:52:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:52:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:17,578 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 15:52:17,579 INFO L226 Difference]: Without dead ends: 1747 [2021-05-03 15:52:17,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:52:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-05-03 15:52:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 786. [2021-05-03 15:52:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.034394904458599) internal successors, (1597), 785 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1597 transitions. [2021-05-03 15:52:17,593 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1597 transitions. Word has length 39 [2021-05-03 15:52:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:17,593 INFO L480 AbstractCegarLoop]: Abstraction has 786 states and 1597 transitions. [2021-05-03 15:52:17,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1597 transitions. [2021-05-03 15:52:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:17,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:17,594 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:17,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 15:52:17,795 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:17,795 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 73 times [2021-05-03 15:52:17,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:17,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457027376] [2021-05-03 15:52:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:18,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457027376] [2021-05-03 15:52:18,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103243375] [2021-05-03 15:52:18,251 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 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 [2021-05-03 15:52:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:18,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:18,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:18,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:18,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:18,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:18,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:18,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:18,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-05-03 15:52:18,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549013926] [2021-05-03 15:52:18,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:52:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:52:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:52:18,894 INFO L87 Difference]: Start difference. First operand 786 states and 1597 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-05-03 15:52:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:19,854 INFO L93 Difference]: Finished difference Result 1617 states and 3240 transitions. [2021-05-03 15:52:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:52:19,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 39 [2021-05-03 15:52:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:19,856 INFO L225 Difference]: With dead ends: 1617 [2021-05-03 15:52:19,856 INFO L226 Difference]: Without dead ends: 1342 [2021-05-03 15:52:19,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1340.5ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:52:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-05-03 15:52:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 900. [2021-05-03 15:52:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.0088987764182424) internal successors, (1806), 899 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1806 transitions. [2021-05-03 15:52:19,868 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1806 transitions. Word has length 39 [2021-05-03 15:52:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:19,872 INFO L480 AbstractCegarLoop]: Abstraction has 900 states and 1806 transitions. [2021-05-03 15:52:19,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-05-03 15:52:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1806 transitions. [2021-05-03 15:52:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:19,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:19,874 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:20,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:20,075 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 74 times [2021-05-03 15:52:20,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:20,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736876473] [2021-05-03 15:52:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736876473] [2021-05-03 15:52:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511552683] [2021-05-03 15:52:20,407 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 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 [2021-05-03 15:52:20,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:52:20,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:20,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:20,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:20,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:20,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:21,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:21,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:21,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:21,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:21,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-05-03 15:52:21,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048624021] [2021-05-03 15:52:21,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:52:21,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:52:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:52:21,018 INFO L87 Difference]: Start difference. First operand 900 states and 1806 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-05-03 15:52:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:22,278 INFO L93 Difference]: Finished difference Result 1694 states and 3387 transitions. [2021-05-03 15:52:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:52:22,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 39 [2021-05-03 15:52:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:22,281 INFO L225 Difference]: With dead ends: 1694 [2021-05-03 15:52:22,281 INFO L226 Difference]: Without dead ends: 1375 [2021-05-03 15:52:22,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1203.7ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:52:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-05-03 15:52:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 873. [2021-05-03 15:52:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.0240825688073394) internal successors, (1765), 872 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1765 transitions. [2021-05-03 15:52:22,294 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1765 transitions. Word has length 39 [2021-05-03 15:52:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:22,294 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 1765 transitions. [2021-05-03 15:52:22,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-05-03 15:52:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1765 transitions. [2021-05-03 15:52:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:22,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:22,295 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:22,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 15:52:22,513 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 75 times [2021-05-03 15:52:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:22,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724651318] [2021-05-03 15:52:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:22,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724651318] [2021-05-03 15:52:22,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29894333] [2021-05-03 15:52:22,913 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 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 [2021-05-03 15:52:22,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:52:22,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:22,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-03 15:52:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:24,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:24,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-05-03 15:52:24,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:24,101 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:52:24,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:24,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-05-03 15:52:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:24,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:24,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-05-03 15:52:24,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712636719] [2021-05-03 15:52:24,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:52:24,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:52:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:52:24,120 INFO L87 Difference]: Start difference. First operand 873 states and 1765 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:26,463 INFO L93 Difference]: Finished difference Result 2346 states and 4666 transitions. [2021-05-03 15:52:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:26,467 INFO L225 Difference]: With dead ends: 2346 [2021-05-03 15:52:26,467 INFO L226 Difference]: Without dead ends: 2017 [2021-05-03 15:52:26,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2430.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:52:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-05-03 15:52:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1218. [2021-05-03 15:52:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.9852095316351686) internal successors, (2416), 1217 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2416 transitions. [2021-05-03 15:52:26,481 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2416 transitions. Word has length 39 [2021-05-03 15:52:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:26,481 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 2416 transitions. [2021-05-03 15:52:26,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2416 transitions. [2021-05-03 15:52:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:26,483 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:26,483 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:26,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:26,684 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 76 times [2021-05-03 15:52:26,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:26,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982294723] [2021-05-03 15:52:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:27,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982294723] [2021-05-03 15:52:27,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044066039] [2021-05-03 15:52:27,118 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 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 [2021-05-03 15:52:27,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:52:27,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:27,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:27,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:27,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:27,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:27,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:27,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:27,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:27,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:27,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-05-03 15:52:27,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321556191] [2021-05-03 15:52:27,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:52:27,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:52:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:52:27,915 INFO L87 Difference]: Start difference. First operand 1218 states and 2416 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-05-03 15:52:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:28,947 INFO L93 Difference]: Finished difference Result 2599 states and 5373 transitions. [2021-05-03 15:52:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:52:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 39 [2021-05-03 15:52:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:28,951 INFO L225 Difference]: With dead ends: 2599 [2021-05-03 15:52:28,951 INFO L226 Difference]: Without dead ends: 2445 [2021-05-03 15:52:28,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 972.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:52:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-05-03 15:52:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1233. [2021-05-03 15:52:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.9853896103896105) internal successors, (2446), 1232 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2446 transitions. [2021-05-03 15:52:28,970 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2446 transitions. Word has length 39 [2021-05-03 15:52:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:28,971 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 2446 transitions. [2021-05-03 15:52:28,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-05-03 15:52:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2446 transitions. [2021-05-03 15:52:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:28,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:28,972 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:29,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:29,173 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 77 times [2021-05-03 15:52:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:29,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442281111] [2021-05-03 15:52:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:29,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442281111] [2021-05-03 15:52:29,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361862935] [2021-05-03 15:52:29,570 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 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 [2021-05-03 15:52:29,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:52:29,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:29,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:29,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:30,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-05-03 15:52:30,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:30,471 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:52:30,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:30,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-05-03 15:52:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:30,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:30,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-05-03 15:52:30,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743170812] [2021-05-03 15:52:30,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:52:30,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:52:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:52:30,488 INFO L87 Difference]: Start difference. First operand 1233 states and 2446 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:32,475 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-05-03 15:52:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:32,549 INFO L93 Difference]: Finished difference Result 2072 states and 4125 transitions. [2021-05-03 15:52:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:52:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:32,553 INFO L225 Difference]: With dead ends: 2072 [2021-05-03 15:52:32,553 INFO L226 Difference]: Without dead ends: 1780 [2021-05-03 15:52:32,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2034.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:52:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-05-03 15:52:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1350. [2021-05-03 15:52:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.984432913269088) internal successors, (2677), 1349 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2677 transitions. [2021-05-03 15:52:32,569 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2677 transitions. Word has length 39 [2021-05-03 15:52:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:32,569 INFO L480 AbstractCegarLoop]: Abstraction has 1350 states and 2677 transitions. [2021-05-03 15:52:32,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2677 transitions. [2021-05-03 15:52:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:32,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:32,571 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:32,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:32,772 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 78 times [2021-05-03 15:52:32,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:32,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364911168] [2021-05-03 15:52:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364911168] [2021-05-03 15:52:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903881943] [2021-05-03 15:52:33,128 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 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 [2021-05-03 15:52:33,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:52:33,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:33,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:33,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:33,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:33,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:33,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:33,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:33,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:33,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:33,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-05-03 15:52:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603342884] [2021-05-03 15:52:33,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:52:33,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:52:33,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:52:33,817 INFO L87 Difference]: Start difference. First operand 1350 states and 2677 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:34,571 INFO L93 Difference]: Finished difference Result 2412 states and 4891 transitions. [2021-05-03 15:52:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:52:34,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:34,575 INFO L225 Difference]: With dead ends: 2412 [2021-05-03 15:52:34,575 INFO L226 Difference]: Without dead ends: 2356 [2021-05-03 15:52:34,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:52:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-03 15:52:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1335. [2021-05-03 15:52:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.9827586206896552) internal successors, (2645), 1334 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2645 transitions. [2021-05-03 15:52:34,596 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2645 transitions. Word has length 39 [2021-05-03 15:52:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:34,596 INFO L480 AbstractCegarLoop]: Abstraction has 1335 states and 2645 transitions. [2021-05-03 15:52:34,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2645 transitions. [2021-05-03 15:52:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:34,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:34,598 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:34,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:34,798 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 79 times [2021-05-03 15:52:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:34,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389847916] [2021-05-03 15:52:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:35,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389847916] [2021-05-03 15:52:35,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878589223] [2021-05-03 15:52:35,223 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 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 [2021-05-03 15:52:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:35,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:36,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:36,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:36,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:36,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:36,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:36,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:36,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:36,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 23 [2021-05-03 15:52:36,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540228737] [2021-05-03 15:52:36,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:52:36,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:36,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:52:36,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:52:36,081 INFO L87 Difference]: Start difference. First operand 1335 states and 2645 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:37,016 INFO L93 Difference]: Finished difference Result 2950 states and 5975 transitions. [2021-05-03 15:52:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:52:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:37,021 INFO L225 Difference]: With dead ends: 2950 [2021-05-03 15:52:37,021 INFO L226 Difference]: Without dead ends: 2886 [2021-05-03 15:52:37,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 983.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:52:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-05-03 15:52:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1341. [2021-05-03 15:52:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.9813432835820894) internal successors, (2655), 1340 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2655 transitions. [2021-05-03 15:52:37,044 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2655 transitions. Word has length 39 [2021-05-03 15:52:37,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:37,045 INFO L480 AbstractCegarLoop]: Abstraction has 1341 states and 2655 transitions. [2021-05-03 15:52:37,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:37,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2655 transitions. [2021-05-03 15:52:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:37,046 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:37,046 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:37,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:37,247 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:37,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:37,248 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 80 times [2021-05-03 15:52:37,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:37,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687504300] [2021-05-03 15:52:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:37,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687504300] [2021-05-03 15:52:37,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640768183] [2021-05-03 15:52:37,721 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:52:37,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:52:37,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:37,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:38,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:38,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:38,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:38,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:38,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-05-03 15:52:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:38,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:38,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-05-03 15:52:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755231966] [2021-05-03 15:52:38,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:52:38,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:52:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:52:38,579 INFO L87 Difference]: Start difference. First operand 1341 states and 2655 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:39,358 INFO L93 Difference]: Finished difference Result 2588 states and 5232 transitions. [2021-05-03 15:52:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:52:39,359 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:52:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:39,362 INFO L225 Difference]: With dead ends: 2588 [2021-05-03 15:52:39,362 INFO L226 Difference]: Without dead ends: 2530 [2021-05-03 15:52:39,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1038.3ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:52:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-05-03 15:52:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1341. [2021-05-03 15:52:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.9813432835820894) internal successors, (2655), 1340 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2655 transitions. [2021-05-03 15:52:39,384 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2655 transitions. Word has length 39 [2021-05-03 15:52:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:39,384 INFO L480 AbstractCegarLoop]: Abstraction has 1341 states and 2655 transitions. [2021-05-03 15:52:39,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2655 transitions. [2021-05-03 15:52:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:52:39,386 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:39,386 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:39,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:39,586 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 81 times [2021-05-03 15:52:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:39,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862840375] [2021-05-03 15:52:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:40,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862840375] [2021-05-03 15:52:40,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771086482] [2021-05-03 15:52:40,075 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 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 [2021-05-03 15:52:40,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:52:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:40,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:52:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:40,704 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-05-03 15:52:40,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-05-03 15:52:40,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:40,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:40,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:40,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:126, output treesize:7 [2021-05-03 15:52:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:40,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:40,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-05-03 15:52:40,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304911285] [2021-05-03 15:52:40,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:52:40,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:52:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:52:40,737 INFO L87 Difference]: Start difference. First operand 1341 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2021-05-03 15:52:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:41,520 INFO L93 Difference]: Finished difference Result 2121 states and 4228 transitions. [2021-05-03 15:52:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:52:41,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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 39 [2021-05-03 15:52:41,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:41,524 INFO L225 Difference]: With dead ends: 2121 [2021-05-03 15:52:41,525 INFO L226 Difference]: Without dead ends: 2106 [2021-05-03 15:52:41,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:52:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-05-03 15:52:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-05-03 15:52:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 1.982182628062361) internal successors, (2670), 1347 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2670 transitions. [2021-05-03 15:52:41,549 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2670 transitions. Word has length 39 [2021-05-03 15:52:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:41,549 INFO L480 AbstractCegarLoop]: Abstraction has 1348 states and 2670 transitions. [2021-05-03 15:52:41,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2021-05-03 15:52:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2670 transitions. [2021-05-03 15:52:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:52:41,551 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:41,551 INFO L551 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:41,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:41,769 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2026240682, now seen corresponding path program 82 times [2021-05-03 15:52:41,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:41,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901921541] [2021-05-03 15:52:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:41,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901921541] [2021-05-03 15:52:41,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001994242] [2021-05-03 15:52:41,873 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 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 [2021-05-03 15:52:41,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:52:41,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 15:52:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:41,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:41,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 15:52:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299055731] [2021-05-03 15:52:41,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:52:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:52:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:52:41,996 INFO L87 Difference]: Start difference. First operand 1348 states and 2670 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:42,054 INFO L93 Difference]: Finished difference Result 1747 states and 3478 transitions. [2021-05-03 15:52:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:52:42,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-03 15:52:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:42,057 INFO L225 Difference]: With dead ends: 1747 [2021-05-03 15:52:42,057 INFO L226 Difference]: Without dead ends: 1739 [2021-05-03 15:52:42,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:52:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-05-03 15:52:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1404. [2021-05-03 15:52:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 1.9928724162508908) internal successors, (2796), 1403 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2796 transitions. [2021-05-03 15:52:42,073 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2796 transitions. Word has length 40 [2021-05-03 15:52:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:42,074 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2796 transitions. [2021-05-03 15:52:42,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2796 transitions. [2021-05-03 15:52:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 15:52:42,075 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:42,076 INFO L551 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:42,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 15:52:42,276 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 83 times [2021-05-03 15:52:42,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:42,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278594130] [2021-05-03 15:52:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:42,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278594130] [2021-05-03 15:52:42,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106807609] [2021-05-03 15:52:42,686 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 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 [2021-05-03 15:52:42,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:52:42,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:42,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-03 15:52:42,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:43,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-05-03 15:52:43,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:43,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:43,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:43,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-05-03 15:52:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:43,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:43,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-05-03 15:52:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613237503] [2021-05-03 15:52:43,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:52:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:52:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:52:43,551 INFO L87 Difference]: Start difference. First operand 1404 states and 2796 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:45,815 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-05-03 15:52:46,170 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-05-03 15:52:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:46,224 INFO L93 Difference]: Finished difference Result 3157 states and 6512 transitions. [2021-05-03 15:52:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 15:52:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 15:52:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:46,229 INFO L225 Difference]: With dead ends: 3157 [2021-05-03 15:52:46,229 INFO L226 Difference]: Without dead ends: 3037 [2021-05-03 15:52:46,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2426.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:52:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-05-03 15:52:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 1410. [2021-05-03 15:52:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.992902767920511) internal successors, (2808), 1409 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2808 transitions. [2021-05-03 15:52:46,254 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2808 transitions. Word has length 42 [2021-05-03 15:52:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:46,254 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 2808 transitions. [2021-05-03 15:52:46,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2808 transitions. [2021-05-03 15:52:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:52:46,256 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:46,256 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:46,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:46,457 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 84 times [2021-05-03 15:52:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:46,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850988298] [2021-05-03 15:52:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:46,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850988298] [2021-05-03 15:52:46,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201399913] [2021-05-03 15:52:46,954 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 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 [2021-05-03 15:52:46,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:52:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:46,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:52:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:48,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:48,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:52:48,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:48,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:48,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:48,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:52:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:48,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:48,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-03 15:52:48,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204551296] [2021-05-03 15:52:48,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:52:48,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:52:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:52:48,282 INFO L87 Difference]: Start difference. First operand 1410 states and 2808 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:49,297 INFO L93 Difference]: Finished difference Result 3844 states and 7895 transitions. [2021-05-03 15:52:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:52:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:49,305 INFO L225 Difference]: With dead ends: 3844 [2021-05-03 15:52:49,305 INFO L226 Difference]: Without dead ends: 3682 [2021-05-03 15:52:49,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1462.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:52:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-05-03 15:52:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 1587. [2021-05-03 15:52:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.980453972257251) internal successors, (3141), 1586 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3141 transitions. [2021-05-03 15:52:49,347 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3141 transitions. Word has length 43 [2021-05-03 15:52:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:49,347 INFO L480 AbstractCegarLoop]: Abstraction has 1587 states and 3141 transitions. [2021-05-03 15:52:49,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3141 transitions. [2021-05-03 15:52:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:52:49,350 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:49,350 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:49,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-03 15:52:49,569 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 85 times [2021-05-03 15:52:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:49,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857489516] [2021-05-03 15:52:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:50,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857489516] [2021-05-03 15:52:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459795493] [2021-05-03 15:52:50,066 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 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 [2021-05-03 15:52:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:50,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:52:50,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:51,357 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-05-03 15:52:51,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:52:51,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:51,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:51,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:51,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:52:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:51,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:51,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-03 15:52:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933601300] [2021-05-03 15:52:51,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:52:51,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:52:51,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:52:51,390 INFO L87 Difference]: Start difference. First operand 1587 states and 3141 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:52,411 INFO L93 Difference]: Finished difference Result 3347 states and 6710 transitions. [2021-05-03 15:52:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:52,413 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:52:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:52,418 INFO L225 Difference]: With dead ends: 3347 [2021-05-03 15:52:52,418 INFO L226 Difference]: Without dead ends: 3319 [2021-05-03 15:52:52,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1436.1ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:52:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-05-03 15:52:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1629. [2021-05-03 15:52:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 1.9828009828009827) internal successors, (3228), 1628 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3228 transitions. [2021-05-03 15:52:52,452 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3228 transitions. Word has length 43 [2021-05-03 15:52:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:52,453 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 3228 transitions. [2021-05-03 15:52:52,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3228 transitions. [2021-05-03 15:52:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:52:52,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:52,455 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:52,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:52,656 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:52,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 86 times [2021-05-03 15:52:52,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:52,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777141900] [2021-05-03 15:52:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777141900] [2021-05-03 15:52:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474877596] [2021-05-03 15:52:53,259 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 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 [2021-05-03 15:52:53,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:52:53,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:53,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:52:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:54,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:54,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:54,715 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-05-03 15:52:54,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:52:54,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:54,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:54,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:54,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:52:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:54,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:54,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-05-03 15:52:54,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714652626] [2021-05-03 15:52:54,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:52:54,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:52:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:52:54,751 INFO L87 Difference]: Start difference. First operand 1629 states and 3228 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:52:56,640 INFO L93 Difference]: Finished difference Result 4033 states and 8289 transitions. [2021-05-03 15:52:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:52:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:52:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:52:56,647 INFO L225 Difference]: With dead ends: 4033 [2021-05-03 15:52:56,647 INFO L226 Difference]: Without dead ends: 3863 [2021-05-03 15:52:56,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1680.2ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:52:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2021-05-03 15:52:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 1449. [2021-05-03 15:52:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 1.9848066298342542) internal successors, (2874), 1448 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2874 transitions. [2021-05-03 15:52:56,683 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2874 transitions. Word has length 43 [2021-05-03 15:52:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:52:56,683 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 2874 transitions. [2021-05-03 15:52:56,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:52:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2874 transitions. [2021-05-03 15:52:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:52:56,685 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:52:56,686 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:52:56,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:52:56,886 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:52:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:52:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 87 times [2021-05-03 15:52:56,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:52:56,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103902614] [2021-05-03 15:52:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:52:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:52:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:57,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103902614] [2021-05-03 15:52:57,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233320552] [2021-05-03 15:52:57,492 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 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 [2021-05-03 15:52:57,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:52:57,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:52:57,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:52:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:52:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:58,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:58,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:58,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:52:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:52:59,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:52:59,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:52:59,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:52:59,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:52:59,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:52:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:52:59,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:52:59,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-05-03 15:52:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803292302] [2021-05-03 15:52:59,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:52:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:52:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:52:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:52:59,054 INFO L87 Difference]: Start difference. First operand 1449 states and 2874 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:01,111 INFO L93 Difference]: Finished difference Result 3287 states and 6612 transitions. [2021-05-03 15:53:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:53:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:01,118 INFO L225 Difference]: With dead ends: 3287 [2021-05-03 15:53:01,118 INFO L226 Difference]: Without dead ends: 3259 [2021-05-03 15:53:01,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1767.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-05-03 15:53:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 1425. [2021-05-03 15:53:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.9901685393258426) internal successors, (2834), 1424 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2834 transitions. [2021-05-03 15:53:01,142 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2834 transitions. Word has length 43 [2021-05-03 15:53:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:01,142 INFO L480 AbstractCegarLoop]: Abstraction has 1425 states and 2834 transitions. [2021-05-03 15:53:01,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2834 transitions. [2021-05-03 15:53:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:01,144 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:01,144 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:01,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:01,345 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 88 times [2021-05-03 15:53:01,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:01,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364715567] [2021-05-03 15:53:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364715567] [2021-05-03 15:53:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293517956] [2021-05-03 15:53:01,904 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 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 [2021-05-03 15:53:01,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:53:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:01,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:03,395 INFO L244 Elim1Store]: Index analysis took 106 ms [2021-05-03 15:53:03,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:03,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:03,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:03,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:03,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:03,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:03,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-05-03 15:53:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46473746] [2021-05-03 15:53:03,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:53:03,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:03,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:53:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:03,432 INFO L87 Difference]: Start difference. First operand 1425 states and 2834 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:04,309 INFO L93 Difference]: Finished difference Result 2962 states and 5956 transitions. [2021-05-03 15:53:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:53:04,311 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:04,315 INFO L225 Difference]: With dead ends: 2962 [2021-05-03 15:53:04,315 INFO L226 Difference]: Without dead ends: 2919 [2021-05-03 15:53:04,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1654.3ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-05-03 15:53:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 1515. [2021-05-03 15:53:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 1.974900924702774) internal successors, (2990), 1514 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2990 transitions. [2021-05-03 15:53:04,338 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2990 transitions. Word has length 43 [2021-05-03 15:53:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:04,338 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 2990 transitions. [2021-05-03 15:53:04,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2990 transitions. [2021-05-03 15:53:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:04,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:04,340 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:04,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:04,541 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1073928909, now seen corresponding path program 89 times [2021-05-03 15:53:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:04,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565657913] [2021-05-03 15:53:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:53:04,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565657913] [2021-05-03 15:53:04,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283165730] [2021-05-03 15:53:04,982 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 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 [2021-05-03 15:53:05,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:53:05,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:05,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-03 15:53:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:06,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 55 [2021-05-03 15:53:06,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:06,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:06,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:06,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-05-03 15:53:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:06,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:06,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-05-03 15:53:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003659331] [2021-05-03 15:53:06,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:53:06,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:53:06,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:53:06,319 INFO L87 Difference]: Start difference. First operand 1515 states and 2990 transitions. Second operand has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:07,420 INFO L93 Difference]: Finished difference Result 2604 states and 5185 transitions. [2021-05-03 15:53:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:53:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) 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 43 [2021-05-03 15:53:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:07,424 INFO L225 Difference]: With dead ends: 2604 [2021-05-03 15:53:07,424 INFO L226 Difference]: Without dead ends: 2303 [2021-05-03 15:53:07,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1892.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:53:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-05-03 15:53:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1701. [2021-05-03 15:53:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 1.9764705882352942) internal successors, (3360), 1700 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3360 transitions. [2021-05-03 15:53:07,439 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3360 transitions. Word has length 43 [2021-05-03 15:53:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:07,439 INFO L480 AbstractCegarLoop]: Abstraction has 1701 states and 3360 transitions. [2021-05-03 15:53:07,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:07,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3360 transitions. [2021-05-03 15:53:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:07,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:07,441 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:07,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-03 15:53:07,641 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-05-03 15:53:07,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:07,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184477879] [2021-05-03 15:53:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:08,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184477879] [2021-05-03 15:53:08,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781083692] [2021-05-03 15:53:08,054 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 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 [2021-05-03 15:53:08,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 15:53:08,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:08,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:09,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:09,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:09,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:09,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:09,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:09,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:09,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:09,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:09,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-05-03 15:53:09,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618292065] [2021-05-03 15:53:09,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:53:09,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:53:09,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:53:09,643 INFO L87 Difference]: Start difference. First operand 1701 states and 3360 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:10,794 INFO L93 Difference]: Finished difference Result 2999 states and 6043 transitions. [2021-05-03 15:53:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:53:10,795 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:10,799 INFO L225 Difference]: With dead ends: 2999 [2021-05-03 15:53:10,799 INFO L226 Difference]: Without dead ends: 2938 [2021-05-03 15:53:10,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1587.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:53:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-05-03 15:53:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1674. [2021-05-03 15:53:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9701135684399282) internal successors, (3296), 1673 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3296 transitions. [2021-05-03 15:53:10,826 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3296 transitions. Word has length 43 [2021-05-03 15:53:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:10,826 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 3296 transitions. [2021-05-03 15:53:10,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3296 transitions. [2021-05-03 15:53:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:10,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:10,828 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:11,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:11,030 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-05-03 15:53:11,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:11,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334400552] [2021-05-03 15:53:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:11,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334400552] [2021-05-03 15:53:11,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641210850] [2021-05-03 15:53:11,724 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 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 [2021-05-03 15:53:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:11,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:13,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:13,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:13,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:13,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:13,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:13,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:13,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:13,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:13,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-05-03 15:53:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366159222] [2021-05-03 15:53:13,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:53:13,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:53:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:13,281 INFO L87 Difference]: Start difference. First operand 1674 states and 3296 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:14,483 INFO L93 Difference]: Finished difference Result 3421 states and 6991 transitions. [2021-05-03 15:53:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:53:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:14,490 INFO L225 Difference]: With dead ends: 3421 [2021-05-03 15:53:14,490 INFO L226 Difference]: Without dead ends: 3299 [2021-05-03 15:53:14,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1826.9ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2021-05-03 15:53:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 1686. [2021-05-03 15:53:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 1.970326409495549) internal successors, (3320), 1685 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3320 transitions. [2021-05-03 15:53:14,521 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3320 transitions. Word has length 43 [2021-05-03 15:53:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:14,521 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 3320 transitions. [2021-05-03 15:53:14,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3320 transitions. [2021-05-03 15:53:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:14,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:14,526 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:14,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-03 15:53:14,731 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-05-03 15:53:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:14,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883355130] [2021-05-03 15:53:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:53:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883355130] [2021-05-03 15:53:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691308886] [2021-05-03 15:53:15,288 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 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 [2021-05-03 15:53:15,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:53:15,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:15,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:16,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:16,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:16,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:16,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:16,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:16,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:16,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:16,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:16,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-05-03 15:53:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912371987] [2021-05-03 15:53:16,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:53:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:53:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:53:16,769 INFO L87 Difference]: Start difference. First operand 1686 states and 3320 transitions. Second operand has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:18,178 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-05-03 15:53:18,382 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-05-03 15:53:19,070 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2021-05-03 15:53:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:19,174 INFO L93 Difference]: Finished difference Result 2579 states and 5116 transitions. [2021-05-03 15:53:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:53:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) 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 43 [2021-05-03 15:53:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:19,178 INFO L225 Difference]: With dead ends: 2579 [2021-05-03 15:53:19,178 INFO L226 Difference]: Without dead ends: 2287 [2021-05-03 15:53:19,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2481.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:53:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-05-03 15:53:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1812. [2021-05-03 15:53:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 1.9690778575372723) internal successors, (3566), 1811 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3566 transitions. [2021-05-03 15:53:19,200 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3566 transitions. Word has length 43 [2021-05-03 15:53:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:19,200 INFO L480 AbstractCegarLoop]: Abstraction has 1812 states and 3566 transitions. [2021-05-03 15:53:19,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3566 transitions. [2021-05-03 15:53:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:19,203 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:19,203 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:19,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:19,403 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-05-03 15:53:19,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:19,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940815068] [2021-05-03 15:53:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940815068] [2021-05-03 15:53:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247676853] [2021-05-03 15:53:19,944 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 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 [2021-05-03 15:53:19,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:53:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:19,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-03 15:53:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:21,809 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-05-03 15:53:21,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-05-03 15:53:21,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:21,841 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:53:21,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:21,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-05-03 15:53:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:21,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-05-03 15:53:21,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431553234] [2021-05-03 15:53:21,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:53:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:53:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:53:21,863 INFO L87 Difference]: Start difference. First operand 1812 states and 3566 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:22,920 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 15:53:24,810 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-05-03 15:53:25,059 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-05-03 15:53:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:26,162 INFO L93 Difference]: Finished difference Result 3260 states and 6509 transitions. [2021-05-03 15:53:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:53:26,164 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:26,168 INFO L225 Difference]: With dead ends: 3260 [2021-05-03 15:53:26,168 INFO L226 Difference]: Without dead ends: 2995 [2021-05-03 15:53:26,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 4128.2ms TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:53:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-05-03 15:53:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1821. [2021-05-03 15:53:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.9664835164835164) internal successors, (3579), 1820 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 3579 transitions. [2021-05-03 15:53:26,195 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 3579 transitions. Word has length 43 [2021-05-03 15:53:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:26,195 INFO L480 AbstractCegarLoop]: Abstraction has 1821 states and 3579 transitions. [2021-05-03 15:53:26,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 3579 transitions. [2021-05-03 15:53:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:26,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:26,198 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:26,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:26,398 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-05-03 15:53:26,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:26,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726244795] [2021-05-03 15:53:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726244795] [2021-05-03 15:53:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242793232] [2021-05-03 15:53:27,034 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 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 [2021-05-03 15:53:27,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:53:27,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:27,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:28,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:28,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:28,787 INFO L244 Elim1Store]: Index analysis took 110 ms [2021-05-03 15:53:28,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:28,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:28,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:28,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:28,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:28,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:28,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-03 15:53:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950533773] [2021-05-03 15:53:28,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:53:28,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:53:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:53:28,831 INFO L87 Difference]: Start difference. First operand 1821 states and 3579 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:29,934 INFO L93 Difference]: Finished difference Result 3746 states and 7528 transitions. [2021-05-03 15:53:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:53:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:29,940 INFO L225 Difference]: With dead ends: 3746 [2021-05-03 15:53:29,940 INFO L226 Difference]: Without dead ends: 3682 [2021-05-03 15:53:29,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1960.4ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:53:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-05-03 15:53:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 1830. [2021-05-03 15:53:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 1.9617277200656096) internal successors, (3588), 1829 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3588 transitions. [2021-05-03 15:53:29,971 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3588 transitions. Word has length 43 [2021-05-03 15:53:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:29,971 INFO L480 AbstractCegarLoop]: Abstraction has 1830 states and 3588 transitions. [2021-05-03 15:53:29,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3588 transitions. [2021-05-03 15:53:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:29,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:29,974 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:30,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 15:53:30,174 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-05-03 15:53:30,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:30,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608251453] [2021-05-03 15:53:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:30,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608251453] [2021-05-03 15:53:30,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736498563] [2021-05-03 15:53:30,916 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:30,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:53:30,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:30,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-03 15:53:30,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:32,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:32,661 INFO L244 Elim1Store]: Index analysis took 112 ms [2021-05-03 15:53:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:32,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:32,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:32,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:32,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:32,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:32,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-05-03 15:53:32,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703646095] [2021-05-03 15:53:32,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:53:32,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:53:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:32,703 INFO L87 Difference]: Start difference. First operand 1830 states and 3588 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:34,566 INFO L93 Difference]: Finished difference Result 3760 states and 7587 transitions. [2021-05-03 15:53:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:53:34,568 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:34,573 INFO L225 Difference]: With dead ends: 3760 [2021-05-03 15:53:34,573 INFO L226 Difference]: Without dead ends: 3482 [2021-05-03 15:53:34,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2032.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-05-03 15:53:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 1878. [2021-05-03 15:53:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 1.9611081513052744) internal successors, (3681), 1877 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 3681 transitions. [2021-05-03 15:53:34,605 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 3681 transitions. Word has length 43 [2021-05-03 15:53:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:34,605 INFO L480 AbstractCegarLoop]: Abstraction has 1878 states and 3681 transitions. [2021-05-03 15:53:34,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 3681 transitions. [2021-05-03 15:53:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:34,607 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:34,608 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:34,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 15:53:34,808 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-05-03 15:53:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:34,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677474009] [2021-05-03 15:53:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677474009] [2021-05-03 15:53:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849686180] [2021-05-03 15:53:35,652 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:35,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:53:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:35,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-03 15:53:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:37,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:37,524 INFO L244 Elim1Store]: Index analysis took 168 ms [2021-05-03 15:53:37,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 55 [2021-05-03 15:53:37,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:37,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:37,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:37,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:159, output treesize:7 [2021-05-03 15:53:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:37,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:37,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-05-03 15:53:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255284345] [2021-05-03 15:53:37,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:53:37,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:53:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:37,574 INFO L87 Difference]: Start difference. First operand 1878 states and 3681 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:39,252 INFO L93 Difference]: Finished difference Result 3102 states and 6171 transitions. [2021-05-03 15:53:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:53:39,254 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:53:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:39,258 INFO L225 Difference]: With dead ends: 3102 [2021-05-03 15:53:39,259 INFO L226 Difference]: Without dead ends: 3079 [2021-05-03 15:53:39,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2183.2ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:53:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2021-05-03 15:53:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 1881. [2021-05-03 15:53:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 1.9611702127659574) internal successors, (3687), 1880 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3687 transitions. [2021-05-03 15:53:39,288 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3687 transitions. Word has length 43 [2021-05-03 15:53:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:39,288 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 3687 transitions. [2021-05-03 15:53:39,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3687 transitions. [2021-05-03 15:53:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:39,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:39,290 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:39,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:39,510 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-05-03 15:53:39,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:39,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812982163] [2021-05-03 15:53:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:40,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812982163] [2021-05-03 15:53:40,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432555991] [2021-05-03 15:53:40,653 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:40,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:42,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:42,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:42,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:42,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:42,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:42,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:42,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:42,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:42,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:42,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:42,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-05-03 15:53:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184021725] [2021-05-03 15:53:42,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:53:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:53:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:53:42,306 INFO L87 Difference]: Start difference. First operand 1881 states and 3687 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:53:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:43,525 INFO L93 Difference]: Finished difference Result 3862 states and 7721 transitions. [2021-05-03 15:53:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:53:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) 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 43 [2021-05-03 15:53:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:43,531 INFO L225 Difference]: With dead ends: 3862 [2021-05-03 15:53:43,532 INFO L226 Difference]: Without dead ends: 3792 [2021-05-03 15:53:43,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2244.0ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:53:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-05-03 15:53:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2037. [2021-05-03 15:53:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 1.9553045186640472) internal successors, (3981), 2036 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 3981 transitions. [2021-05-03 15:53:43,564 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 3981 transitions. Word has length 43 [2021-05-03 15:53:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:43,564 INFO L480 AbstractCegarLoop]: Abstraction has 2037 states and 3981 transitions. [2021-05-03 15:53:43,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:53:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 3981 transitions. [2021-05-03 15:53:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:43,566 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:43,566 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:43,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 15:53:43,767 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-05-03 15:53:43,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:43,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538131094] [2021-05-03 15:53:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:44,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538131094] [2021-05-03 15:53:44,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467783956] [2021-05-03 15:53:44,279 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:44,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:53:44,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:44,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:45,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:45,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:45,761 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-05-03 15:53:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:45,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:45,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:45,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:45,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:45,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:45,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-05-03 15:53:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110774684] [2021-05-03 15:53:45,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:53:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:53:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:53:45,797 INFO L87 Difference]: Start difference. First operand 2037 states and 3981 transitions. Second operand has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:48,210 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-05-03 15:53:48,487 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-05-03 15:53:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:48,600 INFO L93 Difference]: Finished difference Result 3413 states and 6729 transitions. [2021-05-03 15:53:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:53:48,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) 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 43 [2021-05-03 15:53:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:48,607 INFO L225 Difference]: With dead ends: 3413 [2021-05-03 15:53:48,608 INFO L226 Difference]: Without dead ends: 3051 [2021-05-03 15:53:48,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2309.5ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:53:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-05-03 15:53:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2373. [2021-05-03 15:53:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 1.963743676222597) internal successors, (4658), 2372 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4658 transitions. [2021-05-03 15:53:48,647 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4658 transitions. Word has length 43 [2021-05-03 15:53:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:48,647 INFO L480 AbstractCegarLoop]: Abstraction has 2373 states and 4658 transitions. [2021-05-03 15:53:48,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4658 transitions. [2021-05-03 15:53:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:48,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:48,650 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:48,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 15:53:48,851 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-05-03 15:53:48,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:48,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711327207] [2021-05-03 15:53:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711327207] [2021-05-03 15:53:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762174607] [2021-05-03 15:53:49,612 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:49,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:53:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:49,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:49,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:51,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:51,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:51,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:51,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:51,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:51,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:51,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-05-03 15:53:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896060394] [2021-05-03 15:53:51,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:53:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:53:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:53:51,278 INFO L87 Difference]: Start difference. First operand 2373 states and 4658 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:53:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:53,463 INFO L93 Difference]: Finished difference Result 4290 states and 8728 transitions. [2021-05-03 15:53:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:53:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) 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 43 [2021-05-03 15:53:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:53,470 INFO L225 Difference]: With dead ends: 4290 [2021-05-03 15:53:53,470 INFO L226 Difference]: Without dead ends: 4136 [2021-05-03 15:53:53,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1967.0ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:53:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2021-05-03 15:53:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 2409. [2021-05-03 15:53:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 1.9642857142857142) internal successors, (4730), 2408 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:53,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 4730 transitions. [2021-05-03 15:53:53,512 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 4730 transitions. Word has length 43 [2021-05-03 15:53:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:53,512 INFO L480 AbstractCegarLoop]: Abstraction has 2409 states and 4730 transitions. [2021-05-03 15:53:53,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:53:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 4730 transitions. [2021-05-03 15:53:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:53,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:53,515 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:53,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-03 15:53:53,717 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-05-03 15:53:53,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:53,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532326495] [2021-05-03 15:53:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:53:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:54,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532326495] [2021-05-03 15:53:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151049826] [2021-05-03 15:53:54,387 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:54,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:53:54,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:53:54,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:53:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:53:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:56,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:53:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:53:56,113 INFO L244 Elim1Store]: Index analysis took 109 ms [2021-05-03 15:53:56,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:53:56,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:53:56,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:53:56,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:53:56,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:53:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:53:56,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:53:56,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-05-03 15:53:56,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208293096] [2021-05-03 15:53:56,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:53:56,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:53:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:53:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:53:56,153 INFO L87 Difference]: Start difference. First operand 2409 states and 4730 transitions. Second operand has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:58,025 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-05-03 15:53:58,512 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-05-03 15:53:58,817 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-05-03 15:53:59,067 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2021-05-03 15:53:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:53:59,212 INFO L93 Difference]: Finished difference Result 3794 states and 7472 transitions. [2021-05-03 15:53:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:53:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) 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 43 [2021-05-03 15:53:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:53:59,218 INFO L225 Difference]: With dead ends: 3794 [2021-05-03 15:53:59,219 INFO L226 Difference]: Without dead ends: 3434 [2021-05-03 15:53:59,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2947.4ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:53:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-05-03 15:53:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2729. [2021-05-03 15:53:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 1.9659090909090908) internal successors, (5363), 2728 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:53:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 5363 transitions. [2021-05-03 15:53:59,257 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 5363 transitions. Word has length 43 [2021-05-03 15:53:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:53:59,258 INFO L480 AbstractCegarLoop]: Abstraction has 2729 states and 5363 transitions. [2021-05-03 15:53:59,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) 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) [2021-05-03 15:53:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 5363 transitions. [2021-05-03 15:53:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:53:59,262 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:53:59,262 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:53:59,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:53:59,462 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:53:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:53:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-05-03 15:53:59,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:53:59,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186959583] [2021-05-03 15:53:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:53:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:00,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186959583] [2021-05-03 15:54:00,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863624550] [2021-05-03 15:54:00,216 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:00,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:54:00,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:00,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-03 15:54:00,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:01,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:01,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-05-03 15:54:01,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:01,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:01,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:01,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-05-03 15:54:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:01,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:01,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-03 15:54:01,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227749914] [2021-05-03 15:54:01,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 15:54:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 15:54:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:54:01,713 INFO L87 Difference]: Start difference. First operand 2729 states and 5363 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:06,326 INFO L93 Difference]: Finished difference Result 5362 states and 10750 transitions. [2021-05-03 15:54:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:54:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:06,333 INFO L225 Difference]: With dead ends: 5362 [2021-05-03 15:54:06,334 INFO L226 Difference]: Without dead ends: 5088 [2021-05-03 15:54:06,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 4254.4ms TimeCoverageRelationStatistics Valid=254, Invalid=2938, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 15:54:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-05-03 15:54:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 2798. [2021-05-03 15:54:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.9646049338577047) internal successors, (5495), 2797 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 5495 transitions. [2021-05-03 15:54:06,369 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 5495 transitions. Word has length 43 [2021-05-03 15:54:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:06,369 INFO L480 AbstractCegarLoop]: Abstraction has 2798 states and 5495 transitions. [2021-05-03 15:54:06,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 5495 transitions. [2021-05-03 15:54:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:06,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:06,372 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:06,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 15:54:06,572 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-05-03 15:54:06,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:06,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353245747] [2021-05-03 15:54:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:07,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353245747] [2021-05-03 15:54:07,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707116686] [2021-05-03 15:54:07,089 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:07,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:54:07,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:07,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-03 15:54:07,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:08,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:08,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:08,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:08,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:08,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:08,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:08,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:08,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-05-03 15:54:08,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771955447] [2021-05-03 15:54:08,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:54:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:54:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:54:08,349 INFO L87 Difference]: Start difference. First operand 2798 states and 5495 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:54:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:08,907 INFO L93 Difference]: Finished difference Result 4701 states and 9445 transitions. [2021-05-03 15:54:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:54:08,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) 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 43 [2021-05-03 15:54:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:08,912 INFO L225 Difference]: With dead ends: 4701 [2021-05-03 15:54:08,913 INFO L226 Difference]: Without dead ends: 4425 [2021-05-03 15:54:08,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1408.8ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:54:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2021-05-03 15:54:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 2861. [2021-05-03 15:54:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 1.966083916083916) internal successors, (5623), 2860 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 5623 transitions. [2021-05-03 15:54:08,939 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 5623 transitions. Word has length 43 [2021-05-03 15:54:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:08,939 INFO L480 AbstractCegarLoop]: Abstraction has 2861 states and 5623 transitions. [2021-05-03 15:54:08,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:54:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 5623 transitions. [2021-05-03 15:54:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:08,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:08,941 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:09,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 15:54:09,142 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-05-03 15:54:09,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:09,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136295652] [2021-05-03 15:54:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136295652] [2021-05-03 15:54:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984082594] [2021-05-03 15:54:09,768 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:09,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:10,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:10,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:10,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:10,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:10,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:10,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:10,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-05-03 15:54:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704344778] [2021-05-03 15:54:10,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:54:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:54:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:54:10,850 INFO L87 Difference]: Start difference. First operand 2861 states and 5623 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:54:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:11,964 INFO L93 Difference]: Finished difference Result 4013 states and 7977 transitions. [2021-05-03 15:54:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:54:11,966 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) 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 43 [2021-05-03 15:54:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:11,969 INFO L225 Difference]: With dead ends: 4013 [2021-05-03 15:54:11,970 INFO L226 Difference]: Without dead ends: 3990 [2021-05-03 15:54:11,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1374.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:54:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2021-05-03 15:54:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 2861. [2021-05-03 15:54:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 1.966083916083916) internal successors, (5623), 2860 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 5623 transitions. [2021-05-03 15:54:11,996 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 5623 transitions. Word has length 43 [2021-05-03 15:54:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:11,996 INFO L480 AbstractCegarLoop]: Abstraction has 2861 states and 5623 transitions. [2021-05-03 15:54:11,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) 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) [2021-05-03 15:54:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 5623 transitions. [2021-05-03 15:54:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:11,998 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:11,998 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:12,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:12,199 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:12,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-05-03 15:54:12,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:12,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155109146] [2021-05-03 15:54:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155109146] [2021-05-03 15:54:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595969746] [2021-05-03 15:54:12,708 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:12,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:54:12,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:12,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:13,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:13,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:13,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:13,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:13,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:13,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:13,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:13,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-05-03 15:54:13,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880016234] [2021-05-03 15:54:13,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 15:54:13,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 15:54:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:54:13,746 INFO L87 Difference]: Start difference. First operand 2861 states and 5623 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:14,641 INFO L93 Difference]: Finished difference Result 5745 states and 11638 transitions. [2021-05-03 15:54:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:54:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:54:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:14,652 INFO L225 Difference]: With dead ends: 5745 [2021-05-03 15:54:14,652 INFO L226 Difference]: Without dead ends: 5532 [2021-05-03 15:54:14,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1203.8ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:54:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-05-03 15:54:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 2943. [2021-05-03 15:54:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 1.9687287559483344) internal successors, (5792), 2942 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 5792 transitions. [2021-05-03 15:54:14,705 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 5792 transitions. Word has length 43 [2021-05-03 15:54:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:14,705 INFO L480 AbstractCegarLoop]: Abstraction has 2943 states and 5792 transitions. [2021-05-03 15:54:14,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 5792 transitions. [2021-05-03 15:54:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:14,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:14,708 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:14,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:14,908 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-05-03 15:54:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:14,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281333064] [2021-05-03 15:54:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:15,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281333064] [2021-05-03 15:54:15,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181172589] [2021-05-03 15:54:15,500 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:15,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:54:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:15,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:15,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:16,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:16,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:16,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:16,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:16,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:16,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:16,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-05-03 15:54:16,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113172027] [2021-05-03 15:54:16,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 15:54:16,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:16,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 15:54:16,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:54:16,661 INFO L87 Difference]: Start difference. First operand 2943 states and 5792 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:17,542 INFO L93 Difference]: Finished difference Result 4892 states and 9785 transitions. [2021-05-03 15:54:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:54:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:54:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:17,549 INFO L225 Difference]: With dead ends: 4892 [2021-05-03 15:54:17,549 INFO L226 Difference]: Without dead ends: 4834 [2021-05-03 15:54:17,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1380.4ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:54:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-05-03 15:54:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 2958. [2021-05-03 15:54:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 1.9688873858640514) internal successors, (5822), 2957 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 5822 transitions. [2021-05-03 15:54:17,585 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 5822 transitions. Word has length 43 [2021-05-03 15:54:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:17,585 INFO L480 AbstractCegarLoop]: Abstraction has 2958 states and 5822 transitions. [2021-05-03 15:54:17,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 5822 transitions. [2021-05-03 15:54:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:17,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:17,588 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:17,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:17,793 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-05-03 15:54:17,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:17,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40339665] [2021-05-03 15:54:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:18,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40339665] [2021-05-03 15:54:18,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019918528] [2021-05-03 15:54:18,322 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:18,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:54:18,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:18,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:18,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:19,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:19,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:19,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:19,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:19,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:19,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:19,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-05-03 15:54:19,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317114363] [2021-05-03 15:54:19,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 15:54:19,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:19,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 15:54:19,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:54:19,563 INFO L87 Difference]: Start difference. First operand 2958 states and 5822 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:21,172 INFO L93 Difference]: Finished difference Result 4303 states and 8543 transitions. [2021-05-03 15:54:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:54:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:54:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:21,178 INFO L225 Difference]: With dead ends: 4303 [2021-05-03 15:54:21,179 INFO L226 Difference]: Without dead ends: 4280 [2021-05-03 15:54:21,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1392.8ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:54:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2021-05-03 15:54:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 2958. [2021-05-03 15:54:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 1.9688873858640514) internal successors, (5822), 2957 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 5822 transitions. [2021-05-03 15:54:21,210 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 5822 transitions. Word has length 43 [2021-05-03 15:54:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:21,210 INFO L480 AbstractCegarLoop]: Abstraction has 2958 states and 5822 transitions. [2021-05-03 15:54:21,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 5822 transitions. [2021-05-03 15:54:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:21,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:21,212 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:21,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:21,413 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-05-03 15:54:21,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:21,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936877420] [2021-05-03 15:54:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:21,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936877420] [2021-05-03 15:54:21,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765396773] [2021-05-03 15:54:21,902 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:21,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:54:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:21,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:23,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-05-03 15:54:23,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:23,242 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:54:23,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:23,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-05-03 15:54:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:23,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:23,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-05-03 15:54:23,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26736585] [2021-05-03 15:54:23,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:54:23,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:54:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:54:23,266 INFO L87 Difference]: Start difference. First operand 2958 states and 5822 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:25,507 INFO L93 Difference]: Finished difference Result 4827 states and 9541 transitions. [2021-05-03 15:54:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:54:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:25,514 INFO L225 Difference]: With dead ends: 4827 [2021-05-03 15:54:25,514 INFO L226 Difference]: Without dead ends: 4543 [2021-05-03 15:54:25,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1978.4ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:54:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-05-03 15:54:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 3175. [2021-05-03 15:54:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 1.9757403906742281) internal successors, (6271), 3174 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 6271 transitions. [2021-05-03 15:54:25,552 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 6271 transitions. Word has length 43 [2021-05-03 15:54:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:25,553 INFO L480 AbstractCegarLoop]: Abstraction has 3175 states and 6271 transitions. [2021-05-03 15:54:25,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 6271 transitions. [2021-05-03 15:54:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:25,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:25,555 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:25,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 15:54:25,756 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-05-03 15:54:25,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:25,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425502323] [2021-05-03 15:54:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:26,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425502323] [2021-05-03 15:54:26,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708727645] [2021-05-03 15:54:26,449 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:26,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:54:26,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:26,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-03 15:54:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:27,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:27,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:27,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:27,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:27,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:27,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:27,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:27,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-03 15:54:27,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135439111] [2021-05-03 15:54:27,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:54:27,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:27,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:54:27,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:54:27,733 INFO L87 Difference]: Start difference. First operand 3175 states and 6271 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:29,186 INFO L93 Difference]: Finished difference Result 5429 states and 10936 transitions. [2021-05-03 15:54:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:54:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:29,194 INFO L225 Difference]: With dead ends: 5429 [2021-05-03 15:54:29,194 INFO L226 Difference]: Without dead ends: 5122 [2021-05-03 15:54:29,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1549.3ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:54:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-05-03 15:54:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 3238. [2021-05-03 15:54:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 1.9777571825764597) internal successors, (6402), 3237 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 6402 transitions. [2021-05-03 15:54:29,234 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 6402 transitions. Word has length 43 [2021-05-03 15:54:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:29,234 INFO L480 AbstractCegarLoop]: Abstraction has 3238 states and 6402 transitions. [2021-05-03 15:54:29,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 6402 transitions. [2021-05-03 15:54:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:29,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:29,236 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:29,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 15:54:29,437 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-05-03 15:54:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:29,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66983389] [2021-05-03 15:54:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:30,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66983389] [2021-05-03 15:54:30,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600401220] [2021-05-03 15:54:30,042 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:30,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:30,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:31,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:31,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:31,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:31,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:31,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:31,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:31,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-03 15:54:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538007535] [2021-05-03 15:54:31,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:54:31,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:31,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:54:31,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:54:31,289 INFO L87 Difference]: Start difference. First operand 3238 states and 6402 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:32,685 INFO L93 Difference]: Finished difference Result 4542 states and 9066 transitions. [2021-05-03 15:54:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:54:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:32,691 INFO L225 Difference]: With dead ends: 4542 [2021-05-03 15:54:32,691 INFO L226 Difference]: Without dead ends: 4519 [2021-05-03 15:54:32,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1446.4ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:54:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-05-03 15:54:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3241. [2021-05-03 15:54:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 3240 states have (on average 1.9777777777777779) internal successors, (6408), 3240 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 6408 transitions. [2021-05-03 15:54:32,732 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 6408 transitions. Word has length 43 [2021-05-03 15:54:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:32,732 INFO L480 AbstractCegarLoop]: Abstraction has 3241 states and 6408 transitions. [2021-05-03 15:54:32,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 6408 transitions. [2021-05-03 15:54:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:32,735 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:32,735 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:32,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 15:54:32,949 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-05-03 15:54:32,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:32,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782732694] [2021-05-03 15:54:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782732694] [2021-05-03 15:54:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906663823] [2021-05-03 15:54:33,588 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:33,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:54:33,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:33,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:34,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:34,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:34,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:34,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:34,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:34,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:34,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-05-03 15:54:34,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391191047] [2021-05-03 15:54:34,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:54:34,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:54:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:54:34,751 INFO L87 Difference]: Start difference. First operand 3241 states and 6408 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:35,597 INFO L93 Difference]: Finished difference Result 5186 states and 10401 transitions. [2021-05-03 15:54:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:54:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:35,612 INFO L225 Difference]: With dead ends: 5186 [2021-05-03 15:54:35,612 INFO L226 Difference]: Without dead ends: 5141 [2021-05-03 15:54:35,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1412.8ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:54:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2021-05-03 15:54:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 3277. [2021-05-03 15:54:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 1.978937728937729) internal successors, (6483), 3276 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 6483 transitions. [2021-05-03 15:54:35,668 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 6483 transitions. Word has length 43 [2021-05-03 15:54:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:35,668 INFO L480 AbstractCegarLoop]: Abstraction has 3277 states and 6483 transitions. [2021-05-03 15:54:35,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 6483 transitions. [2021-05-03 15:54:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:35,670 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:35,670 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:35,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:35,871 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-05-03 15:54:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:35,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458012848] [2021-05-03 15:54:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458012848] [2021-05-03 15:54:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472005996] [2021-05-03 15:54:36,617 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:36,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:54:36,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:36,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:38,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:38,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:38,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-05-03 15:54:38,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:38,291 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:54:38,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:38,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-05-03 15:54:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:38,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:38,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-05-03 15:54:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702737698] [2021-05-03 15:54:38,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:54:38,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:54:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:54:38,317 INFO L87 Difference]: Start difference. First operand 3277 states and 6483 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:40,583 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-05-03 15:54:40,913 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-05-03 15:54:41,123 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-03 15:54:41,804 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2021-05-03 15:54:42,167 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-05-03 15:54:42,443 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-05-03 15:54:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:42,529 INFO L93 Difference]: Finished difference Result 5171 states and 10255 transitions. [2021-05-03 15:54:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 15:54:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:42,537 INFO L225 Difference]: With dead ends: 5171 [2021-05-03 15:54:42,537 INFO L226 Difference]: Without dead ends: 4788 [2021-05-03 15:54:42,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4471.6ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 15:54:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-05-03 15:54:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3720. [2021-05-03 15:54:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 1.973648830330734) internal successors, (7340), 3719 states have internal predecessors, (7340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 7340 transitions. [2021-05-03 15:54:42,575 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 7340 transitions. Word has length 43 [2021-05-03 15:54:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:42,575 INFO L480 AbstractCegarLoop]: Abstraction has 3720 states and 7340 transitions. [2021-05-03 15:54:42,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 7340 transitions. [2021-05-03 15:54:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:42,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:42,578 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:42,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 15:54:42,780 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-05-03 15:54:42,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:42,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846022052] [2021-05-03 15:54:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:43,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846022052] [2021-05-03 15:54:43,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819918134] [2021-05-03 15:54:43,289 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:43,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:54:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:43,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:43,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:44,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:44,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:44,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:44,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:44,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:44,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:44,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:44,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-05-03 15:54:44,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667061931] [2021-05-03 15:54:44,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:54:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:54:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:54:44,481 INFO L87 Difference]: Start difference. First operand 3720 states and 7340 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:45,461 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-05-03 15:54:45,814 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-05-03 15:54:46,138 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-05-03 15:54:46,801 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2021-05-03 15:54:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:46,881 INFO L93 Difference]: Finished difference Result 6763 states and 13577 transitions. [2021-05-03 15:54:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:54:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:46,890 INFO L225 Difference]: With dead ends: 6763 [2021-05-03 15:54:46,891 INFO L226 Difference]: Without dead ends: 6360 [2021-05-03 15:54:46,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2716.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:54:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-05-03 15:54:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 3973. [2021-05-03 15:54:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 3972 states have (on average 1.9763343403826787) internal successors, (7850), 3972 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 7850 transitions. [2021-05-03 15:54:46,946 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 7850 transitions. Word has length 43 [2021-05-03 15:54:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:46,946 INFO L480 AbstractCegarLoop]: Abstraction has 3973 states and 7850 transitions. [2021-05-03 15:54:46,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 7850 transitions. [2021-05-03 15:54:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:46,949 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:46,949 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:47,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:47,165 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-05-03 15:54:47,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:47,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715139765] [2021-05-03 15:54:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:54:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715139765] [2021-05-03 15:54:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844523127] [2021-05-03 15:54:47,776 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:47,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:54:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:47,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:49,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:49,386 INFO L244 Elim1Store]: Index analysis took 118 ms [2021-05-03 15:54:49,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-05-03 15:54:49,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:49,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:49,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:49,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-05-03 15:54:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:49,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:49,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-05-03 15:54:49,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148232980] [2021-05-03 15:54:49,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:54:49,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:54:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:54:49,465 INFO L87 Difference]: Start difference. First operand 3973 states and 7850 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) [2021-05-03 15:54:50,938 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-03 15:54:51,180 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 15:54:52,031 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-05-03 15:54:52,685 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-05-03 15:54:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:53,222 INFO L93 Difference]: Finished difference Result 5185 states and 10268 transitions. [2021-05-03 15:54:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:54:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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 [2021-05-03 15:54:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:53,230 INFO L225 Difference]: With dead ends: 5185 [2021-05-03 15:54:53,230 INFO L226 Difference]: Without dead ends: 5076 [2021-05-03 15:54:53,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3680.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:54:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-05-03 15:54:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4044. [2021-05-03 15:54:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4043 states have (on average 1.9784813257482068) internal successors, (7999), 4043 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 7999 transitions. [2021-05-03 15:54:53,274 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 7999 transitions. Word has length 43 [2021-05-03 15:54:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:53,274 INFO L480 AbstractCegarLoop]: Abstraction has 4044 states and 7999 transitions. [2021-05-03 15:54:53,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) [2021-05-03 15:54:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 7999 transitions. [2021-05-03 15:54:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:53,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:53,277 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:53,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 15:54:53,480 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-05-03 15:54:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:53,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343241546] [2021-05-03 15:54:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:54,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343241546] [2021-05-03 15:54:54,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090914525] [2021-05-03 15:54:54,147 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:54,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:54:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:54:54,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:55,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:55,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:55,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:55,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:55,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:55,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:55,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:55,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-05-03 15:54:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16184009] [2021-05-03 15:54:55,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:54:55,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:54:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:54:55,288 INFO L87 Difference]: Start difference. First operand 4044 states and 7999 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:56,405 INFO L93 Difference]: Finished difference Result 6010 states and 11912 transitions. [2021-05-03 15:54:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:54:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:56,414 INFO L225 Difference]: With dead ends: 6010 [2021-05-03 15:54:56,414 INFO L226 Difference]: Without dead ends: 5742 [2021-05-03 15:54:56,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1424.2ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:54:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-05-03 15:54:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 4235. [2021-05-03 15:54:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 4234 states have (on average 1.9825224374114312) internal successors, (8394), 4234 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 8394 transitions. [2021-05-03 15:54:56,473 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 8394 transitions. Word has length 43 [2021-05-03 15:54:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:56,473 INFO L480 AbstractCegarLoop]: Abstraction has 4235 states and 8394 transitions. [2021-05-03 15:54:56,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 8394 transitions. [2021-05-03 15:54:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:56,476 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:56,476 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:56,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:56,676 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-05-03 15:54:56,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:56,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002032229] [2021-05-03 15:54:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:57,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002032229] [2021-05-03 15:54:57,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163415228] [2021-05-03 15:54:57,204 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:54:57,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:54:57,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:54:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:58,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:54:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:54:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:54:58,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:54:58,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:54:58,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:54:58,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:54:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:54:58,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:54:58,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-05-03 15:54:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747246154] [2021-05-03 15:54:58,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:54:58,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:54:58,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:54:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:54:58,407 INFO L87 Difference]: Start difference. First operand 4235 states and 8394 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:54:59,522 INFO L93 Difference]: Finished difference Result 6529 states and 13076 transitions. [2021-05-03 15:54:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:54:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:54:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:54:59,530 INFO L225 Difference]: With dead ends: 6529 [2021-05-03 15:54:59,530 INFO L226 Difference]: Without dead ends: 6284 [2021-05-03 15:54:59,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1317.5ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:54:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-05-03 15:54:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 4748. [2021-05-03 15:54:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 1.9974720876342953) internal successors, (9482), 4747 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 9482 transitions. [2021-05-03 15:54:59,577 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 9482 transitions. Word has length 43 [2021-05-03 15:54:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:54:59,577 INFO L480 AbstractCegarLoop]: Abstraction has 4748 states and 9482 transitions. [2021-05-03 15:54:59,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:54:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 9482 transitions. [2021-05-03 15:54:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:54:59,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:54:59,580 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:54:59,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:54:59,781 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:54:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:54:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-05-03 15:54:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:54:59,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049803858] [2021-05-03 15:54:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:54:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:00,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049803858] [2021-05-03 15:55:00,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127375972] [2021-05-03 15:55:00,400 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:00,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:55:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:00,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:01,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:01,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:01,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:01,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:01,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:01,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:01,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-05-03 15:55:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186879943] [2021-05-03 15:55:01,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:55:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:55:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:55:01,747 INFO L87 Difference]: Start difference. First operand 4748 states and 9482 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:03,058 INFO L93 Difference]: Finished difference Result 7359 states and 14824 transitions. [2021-05-03 15:55:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:55:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:03,071 INFO L225 Difference]: With dead ends: 7359 [2021-05-03 15:55:03,071 INFO L226 Difference]: Without dead ends: 7294 [2021-05-03 15:55:03,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:55:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2021-05-03 15:55:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 4580. [2021-05-03 15:55:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 1.9903909150469534) internal successors, (9114), 4579 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 9114 transitions. [2021-05-03 15:55:03,136 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 9114 transitions. Word has length 43 [2021-05-03 15:55:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:03,136 INFO L480 AbstractCegarLoop]: Abstraction has 4580 states and 9114 transitions. [2021-05-03 15:55:03,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 9114 transitions. [2021-05-03 15:55:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:55:03,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:03,140 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:03,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-05-03 15:55:03,357 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-05-03 15:55:03,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:03,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993393398] [2021-05-03 15:55:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:04,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993393398] [2021-05-03 15:55:04,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873201767] [2021-05-03 15:55:04,116 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:04,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:55:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:04,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:05,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:05,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:05,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:05,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:05,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:05,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:05,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:05,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:05,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-05-03 15:55:05,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757805004] [2021-05-03 15:55:05,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:55:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:55:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:55:05,465 INFO L87 Difference]: Start difference. First operand 4580 states and 9114 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:07,465 INFO L93 Difference]: Finished difference Result 6924 states and 14042 transitions. [2021-05-03 15:55:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:55:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:07,476 INFO L225 Difference]: With dead ends: 6924 [2021-05-03 15:55:07,476 INFO L226 Difference]: Without dead ends: 6799 [2021-05-03 15:55:07,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1622.4ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:55:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6799 states. [2021-05-03 15:55:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6799 to 4595. [2021-05-03 15:55:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4594 states have (on average 1.9906399651719635) internal successors, (9145), 4594 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 9145 transitions. [2021-05-03 15:55:07,532 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 9145 transitions. Word has length 43 [2021-05-03 15:55:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:07,532 INFO L480 AbstractCegarLoop]: Abstraction has 4595 states and 9145 transitions. [2021-05-03 15:55:07,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 9145 transitions. [2021-05-03 15:55:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:55:07,535 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:07,535 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:07,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 15:55:07,736 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:07,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-05-03 15:55:07,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:07,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047819795] [2021-05-03 15:55:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:08,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047819795] [2021-05-03 15:55:08,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451351898] [2021-05-03 15:55:08,431 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:08,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:55:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:08,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:08,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:09,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:09,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:09,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:09,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:09,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:09,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:09,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-05-03 15:55:09,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832234214] [2021-05-03 15:55:09,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:55:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:55:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:55:09,868 INFO L87 Difference]: Start difference. First operand 4595 states and 9145 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:11,082 INFO L93 Difference]: Finished difference Result 6133 states and 12271 transitions. [2021-05-03 15:55:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:55:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:11,092 INFO L225 Difference]: With dead ends: 6133 [2021-05-03 15:55:11,092 INFO L226 Difference]: Without dead ends: 5898 [2021-05-03 15:55:11,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1701.4ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:55:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2021-05-03 15:55:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 4735. [2021-05-03 15:55:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 1.9951415293620616) internal successors, (9445), 4734 states have internal predecessors, (9445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 9445 transitions. [2021-05-03 15:55:11,150 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 9445 transitions. Word has length 43 [2021-05-03 15:55:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:11,150 INFO L480 AbstractCegarLoop]: Abstraction has 4735 states and 9445 transitions. [2021-05-03 15:55:11,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 9445 transitions. [2021-05-03 15:55:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:55:11,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:11,155 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:11,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:11,355 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-05-03 15:55:11,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:11,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143965558] [2021-05-03 15:55:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:12,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143965558] [2021-05-03 15:55:12,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529191798] [2021-05-03 15:55:12,206 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:12,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 15:55:12,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:12,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:13,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:13,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:13,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:13,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:13,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:13,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:13,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:13,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:13,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-05-03 15:55:13,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543771398] [2021-05-03 15:55:13,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:55:13,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:55:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:55:13,881 INFO L87 Difference]: Start difference. First operand 4735 states and 9445 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:15,622 INFO L93 Difference]: Finished difference Result 6939 states and 13951 transitions. [2021-05-03 15:55:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:55:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:15,634 INFO L225 Difference]: With dead ends: 6939 [2021-05-03 15:55:15,634 INFO L226 Difference]: Without dead ends: 6879 [2021-05-03 15:55:15,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1901.6ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:55:15,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2021-05-03 15:55:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 4676. [2021-05-03 15:55:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 4675 states have (on average 1.9929411764705882) internal successors, (9317), 4675 states have internal predecessors, (9317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 9317 transitions. [2021-05-03 15:55:15,722 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 9317 transitions. Word has length 43 [2021-05-03 15:55:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:15,722 INFO L480 AbstractCegarLoop]: Abstraction has 4676 states and 9317 transitions. [2021-05-03 15:55:15,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 9317 transitions. [2021-05-03 15:55:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:55:15,726 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:15,727 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:15,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 15:55:15,927 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-05-03 15:55:15,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:15,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348827065] [2021-05-03 15:55:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:16,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348827065] [2021-05-03 15:55:16,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555177789] [2021-05-03 15:55:16,853 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:16,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:55:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:16,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:18,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:18,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:18,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:18,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:18,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:18,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:18,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:18,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-05-03 15:55:18,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198970303] [2021-05-03 15:55:18,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:55:18,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:55:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:55:18,412 INFO L87 Difference]: Start difference. First operand 4676 states and 9317 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:19,567 INFO L93 Difference]: Finished difference Result 7544 states and 15246 transitions. [2021-05-03 15:55:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:55:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:19,595 INFO L225 Difference]: With dead ends: 7544 [2021-05-03 15:55:19,595 INFO L226 Difference]: Without dead ends: 7476 [2021-05-03 15:55:19,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1903.2ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:55:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-05-03 15:55:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 4686. [2021-05-03 15:55:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 1.9929562433297758) internal successors, (9337), 4685 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 9337 transitions. [2021-05-03 15:55:19,655 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 9337 transitions. Word has length 43 [2021-05-03 15:55:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:19,655 INFO L480 AbstractCegarLoop]: Abstraction has 4686 states and 9337 transitions. [2021-05-03 15:55:19,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 9337 transitions. [2021-05-03 15:55:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:55:19,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:19,659 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:19,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:19,860 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-05-03 15:55:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:19,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863250235] [2021-05-03 15:55:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:20,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863250235] [2021-05-03 15:55:20,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882478897] [2021-05-03 15:55:20,728 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:20,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:22,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:22,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:22,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:22,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:22,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:22,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:22,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:22,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-05-03 15:55:22,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340439510] [2021-05-03 15:55:22,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:55:22,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:22,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:55:22,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:55:22,359 INFO L87 Difference]: Start difference. First operand 4686 states and 9337 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:24,672 INFO L93 Difference]: Finished difference Result 6877 states and 13860 transitions. [2021-05-03 15:55:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:55:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:24,688 INFO L225 Difference]: With dead ends: 6877 [2021-05-03 15:55:24,689 INFO L226 Difference]: Without dead ends: 6817 [2021-05-03 15:55:24,689 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1872.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:55:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2021-05-03 15:55:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 4686. [2021-05-03 15:55:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 1.9929562433297758) internal successors, (9337), 4685 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 9337 transitions. [2021-05-03 15:55:24,770 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 9337 transitions. Word has length 43 [2021-05-03 15:55:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:24,770 INFO L480 AbstractCegarLoop]: Abstraction has 4686 states and 9337 transitions. [2021-05-03 15:55:24,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 9337 transitions. [2021-05-03 15:55:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:55:24,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:24,775 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:24,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-03 15:55:24,989 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-05-03 15:55:24,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:24,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216446953] [2021-05-03 15:55:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216446953] [2021-05-03 15:55:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585545293] [2021-05-03 15:55:25,755 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:25,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:55:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:25,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:26,999 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-05-03 15:55:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:27,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:27,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:27,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:27,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-05-03 15:55:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:27,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:27,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-05-03 15:55:27,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037660670] [2021-05-03 15:55:27,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:55:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:27,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:55:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:55:27,062 INFO L87 Difference]: Start difference. First operand 4686 states and 9337 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:28,297 INFO L93 Difference]: Finished difference Result 6304 states and 12632 transitions. [2021-05-03 15:55:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:55:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 15:55:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:28,315 INFO L225 Difference]: With dead ends: 6304 [2021-05-03 15:55:28,315 INFO L226 Difference]: Without dead ends: 6289 [2021-05-03 15:55:28,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1621.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:55:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-05-03 15:55:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 4693. [2021-05-03 15:55:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 1.9931798806479113) internal successors, (9352), 4692 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 9352 transitions. [2021-05-03 15:55:28,402 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 9352 transitions. Word has length 43 [2021-05-03 15:55:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:28,402 INFO L480 AbstractCegarLoop]: Abstraction has 4693 states and 9352 transitions. [2021-05-03 15:55:28,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 9352 transitions. [2021-05-03 15:55:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 15:55:28,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:28,410 INFO L551 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:28,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:28,636 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 123 times [2021-05-03 15:55:28,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:28,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432702764] [2021-05-03 15:55:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:28,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432702764] [2021-05-03 15:55:28,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734557352] [2021-05-03 15:55:28,825 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:28,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 15:55:28,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 15:55:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:29,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:29,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 15:55:29,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833926799] [2021-05-03 15:55:29,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:55:29,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:29,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:55:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:55:29,224 INFO L87 Difference]: Start difference. First operand 4693 states and 9352 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:29,360 INFO L93 Difference]: Finished difference Result 5175 states and 10331 transitions. [2021-05-03 15:55:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:55:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 15:55:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:29,369 INFO L225 Difference]: With dead ends: 5175 [2021-05-03 15:55:29,369 INFO L226 Difference]: Without dead ends: 5166 [2021-05-03 15:55:29,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:55:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-05-03 15:55:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4756. [2021-05-03 15:55:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4756 states, 4755 states have (on average 1.9964248159831757) internal successors, (9493), 4755 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4756 states to 4756 states and 9493 transitions. [2021-05-03 15:55:29,425 INFO L78 Accepts]: Start accepts. Automaton has 4756 states and 9493 transitions. Word has length 44 [2021-05-03 15:55:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:29,425 INFO L480 AbstractCegarLoop]: Abstraction has 4756 states and 9493 transitions. [2021-05-03 15:55:29,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4756 states and 9493 transitions. [2021-05-03 15:55:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 15:55:29,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:29,430 INFO L551 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:29,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 15:55:29,630 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:29,630 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 124 times [2021-05-03 15:55:29,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:29,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178073155] [2021-05-03 15:55:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178073155] [2021-05-03 15:55:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61461774] [2021-05-03 15:55:30,471 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:30,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:55:30,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:30,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-03 15:55:30,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:31,838 INFO L244 Elim1Store]: Index analysis took 119 ms [2021-05-03 15:55:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-05-03 15:55:31,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:31,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:31,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:31,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-05-03 15:55:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:31,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:31,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-05-03 15:55:31,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401280339] [2021-05-03 15:55:31,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:55:31,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:31,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:55:31,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:55:31,924 INFO L87 Difference]: Start difference. First operand 4756 states and 9493 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:32,964 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-05-03 15:55:33,168 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 15:55:33,380 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-05-03 15:55:33,579 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-05-03 15:55:33,822 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-05-03 15:55:34,045 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-05-03 15:55:34,297 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-05-03 15:55:34,682 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-05-03 15:55:34,883 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-05-03 15:55:35,136 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-05-03 15:55:35,429 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-05-03 15:55:35,727 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-05-03 15:55:35,974 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-05-03 15:55:36,164 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-05-03 15:55:36,460 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-05-03 15:55:36,718 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-05-03 15:55:37,136 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-05-03 15:55:37,461 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-05-03 15:55:37,882 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-05-03 15:55:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:37,932 INFO L93 Difference]: Finished difference Result 8064 states and 16421 transitions. [2021-05-03 15:55:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 15:55:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-05-03 15:55:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:37,947 INFO L225 Difference]: With dead ends: 8064 [2021-05-03 15:55:37,948 INFO L226 Difference]: Without dead ends: 7944 [2021-05-03 15:55:37,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 5619.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:55:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2021-05-03 15:55:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 4781. [2021-05-03 15:55:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4781 states, 4780 states have (on average 1.9972803347280335) internal successors, (9547), 4780 states have internal predecessors, (9547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4781 states to 4781 states and 9547 transitions. [2021-05-03 15:55:38,038 INFO L78 Accepts]: Start accepts. Automaton has 4781 states and 9547 transitions. Word has length 46 [2021-05-03 15:55:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:38,038 INFO L480 AbstractCegarLoop]: Abstraction has 4781 states and 9547 transitions. [2021-05-03 15:55:38,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4781 states and 9547 transitions. [2021-05-03 15:55:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:55:38,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:38,045 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:38,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 15:55:38,246 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:38,247 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 125 times [2021-05-03 15:55:38,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:38,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429059818] [2021-05-03 15:55:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429059818] [2021-05-03 15:55:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921654690] [2021-05-03 15:55:39,252 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:39,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:55:39,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:39,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:55:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:42,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:42,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:42,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:42,048 INFO L244 Elim1Store]: Index analysis took 161 ms [2021-05-03 15:55:42,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:55:42,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:42,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:42,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:42,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:55:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:42,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:42,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:55:42,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787179247] [2021-05-03 15:55:42,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:55:42,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:55:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:55:42,115 INFO L87 Difference]: Start difference. First operand 4781 states and 9547 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:44,805 INFO L93 Difference]: Finished difference Result 9005 states and 18294 transitions. [2021-05-03 15:55:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:55:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:55:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:44,821 INFO L225 Difference]: With dead ends: 9005 [2021-05-03 15:55:44,821 INFO L226 Difference]: Without dead ends: 8868 [2021-05-03 15:55:44,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3027.0ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:55:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-05-03 15:55:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 4838. [2021-05-03 15:55:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 1.9973123837089104) internal successors, (9661), 4837 states have internal predecessors, (9661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 9661 transitions. [2021-05-03 15:55:44,901 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 9661 transitions. Word has length 47 [2021-05-03 15:55:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:44,901 INFO L480 AbstractCegarLoop]: Abstraction has 4838 states and 9661 transitions. [2021-05-03 15:55:44,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 9661 transitions. [2021-05-03 15:55:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:55:44,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:44,906 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:45,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:45,107 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 126 times [2021-05-03 15:55:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:45,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453058950] [2021-05-03 15:55:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453058950] [2021-05-03 15:55:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588144324] [2021-05-03 15:55:46,085 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:46,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 15:55:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:55:46,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:55:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:48,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:48,648 INFO L244 Elim1Store]: Index analysis took 177 ms [2021-05-03 15:55:48,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:55:48,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:48,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:48,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:48,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:55:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:48,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:48,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:55:48,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507995983] [2021-05-03 15:55:48,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:55:48,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:55:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:55:48,737 INFO L87 Difference]: Start difference. First operand 4838 states and 9661 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:55:53,132 INFO L93 Difference]: Finished difference Result 8693 states and 17701 transitions. [2021-05-03 15:55:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:55:53,135 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:55:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:55:53,148 INFO L225 Difference]: With dead ends: 8693 [2021-05-03 15:55:53,148 INFO L226 Difference]: Without dead ends: 8556 [2021-05-03 15:55:53,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2847.3ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:55:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-05-03 15:55:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 4898. [2021-05-03 15:55:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 4897 states have (on average 1.9973453134572188) internal successors, (9781), 4897 states have internal predecessors, (9781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 9781 transitions. [2021-05-03 15:55:53,230 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 9781 transitions. Word has length 47 [2021-05-03 15:55:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:55:53,230 INFO L480 AbstractCegarLoop]: Abstraction has 4898 states and 9781 transitions. [2021-05-03 15:55:53,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:55:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 9781 transitions. [2021-05-03 15:55:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:55:53,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:55:53,236 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:55:53,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:53,445 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:55:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:55:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 127 times [2021-05-03 15:55:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:55:53,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479112507] [2021-05-03 15:55:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:55:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:54,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479112507] [2021-05-03 15:55:54,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320860707] [2021-05-03 15:55:54,432 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:55:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:55:54,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-03 15:55:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:55:57,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:55:57,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:55:57,274 INFO L244 Elim1Store]: Index analysis took 202 ms [2021-05-03 15:55:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-05-03 15:55:57,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:55:57,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:55:57,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:55:57,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-05-03 15:55:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:55:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:55:57,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-05-03 15:55:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568234499] [2021-05-03 15:55:57,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 15:55:57,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:55:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 15:55:57,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:55:57,375 INFO L87 Difference]: Start difference. First operand 4898 states and 9781 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:00,446 INFO L93 Difference]: Finished difference Result 8775 states and 17704 transitions. [2021-05-03 15:56:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:56:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:00,465 INFO L225 Difference]: With dead ends: 8775 [2021-05-03 15:56:00,466 INFO L226 Difference]: Without dead ends: 8709 [2021-05-03 15:56:00,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3079.7ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:56:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8709 states. [2021-05-03 15:56:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8709 to 4865. [2021-05-03 15:56:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.9950657894736843) internal successors, (9704), 4864 states have internal predecessors, (9704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 9704 transitions. [2021-05-03 15:56:00,539 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 9704 transitions. Word has length 47 [2021-05-03 15:56:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:00,539 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 9704 transitions. [2021-05-03 15:56:00,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 9704 transitions. [2021-05-03 15:56:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:00,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:00,563 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:00,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:00,769 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 128 times [2021-05-03 15:56:00,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:00,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561883216] [2021-05-03 15:56:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561883216] [2021-05-03 15:56:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744577953] [2021-05-03 15:56:01,772 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:01,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:56:01,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:56:01,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:56:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:56:04,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:04,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:04,744 INFO L244 Elim1Store]: Index analysis took 228 ms [2021-05-03 15:56:04,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:56:04,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:56:04,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:56:04,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:56:04,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:56:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:04,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:56:04,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:56:04,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677525460] [2021-05-03 15:56:04,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:56:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:56:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:56:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:04,823 INFO L87 Difference]: Start difference. First operand 4865 states and 9704 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:07,864 INFO L93 Difference]: Finished difference Result 8432 states and 17014 transitions. [2021-05-03 15:56:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:56:07,867 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:07,878 INFO L225 Difference]: With dead ends: 8432 [2021-05-03 15:56:07,879 INFO L226 Difference]: Without dead ends: 8374 [2021-05-03 15:56:07,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 3155.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2021-05-03 15:56:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 4931. [2021-05-03 15:56:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 1.995131845841785) internal successors, (9836), 4930 states have internal predecessors, (9836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 9836 transitions. [2021-05-03 15:56:07,948 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 9836 transitions. Word has length 47 [2021-05-03 15:56:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:07,949 INFO L480 AbstractCegarLoop]: Abstraction has 4931 states and 9836 transitions. [2021-05-03 15:56:07,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 9836 transitions. [2021-05-03 15:56:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:07,954 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:07,954 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:08,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:08,168 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 129 times [2021-05-03 15:56:08,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:08,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105842318] [2021-05-03 15:56:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105842318] [2021-05-03 15:56:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847192298] [2021-05-03 15:56:09,426 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:09,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-03 15:56:09,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:56:09,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-03 15:56:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:56:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:12,544 INFO L244 Elim1Store]: Index analysis took 195 ms [2021-05-03 15:56:12,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 60 [2021-05-03 15:56:12,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:56:12,599 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 15:56:12,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:56:12,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-05-03 15:56:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:12,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:56:12,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:56:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377486627] [2021-05-03 15:56:12,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:56:12,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:56:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:56:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:12,658 INFO L87 Difference]: Start difference. First operand 4931 states and 9836 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:14,245 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-05-03 15:56:16,081 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-05-03 15:56:16,632 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-03 15:56:17,416 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-05-03 15:56:18,840 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-05-03 15:56:19,166 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-05-03 15:56:19,710 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-05-03 15:56:20,075 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-05-03 15:56:20,632 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-05-03 15:56:21,025 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-05-03 15:56:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:21,577 INFO L93 Difference]: Finished difference Result 8528 states and 17229 transitions. [2021-05-03 15:56:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 15:56:21,580 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:21,592 INFO L225 Difference]: With dead ends: 8528 [2021-05-03 15:56:21,592 INFO L226 Difference]: Without dead ends: 8098 [2021-05-03 15:56:21,593 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 6866.8ms TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:56:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-05-03 15:56:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 5018. [2021-05-03 15:56:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 1.9950169423958541) internal successors, (10009), 5017 states have internal predecessors, (10009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 10009 transitions. [2021-05-03 15:56:21,664 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 10009 transitions. Word has length 47 [2021-05-03 15:56:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:21,664 INFO L480 AbstractCegarLoop]: Abstraction has 5018 states and 10009 transitions. [2021-05-03 15:56:21,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 10009 transitions. [2021-05-03 15:56:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:21,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:21,669 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:21,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 15:56:21,870 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:21,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 130 times [2021-05-03 15:56:21,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:21,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612704007] [2021-05-03 15:56:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612704007] [2021-05-03 15:56:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638262294] [2021-05-03 15:56:23,014 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:23,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:56:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:56:23,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:56:23,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:56:25,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:25,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:25,953 INFO L244 Elim1Store]: Index analysis took 216 ms [2021-05-03 15:56:25,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:56:25,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:56:25,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:56:25,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:56:25,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:56:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:26,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:56:26,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:56:26,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082185869] [2021-05-03 15:56:26,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:56:26,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:56:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:56:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:26,034 INFO L87 Difference]: Start difference. First operand 5018 states and 10009 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:28,437 INFO L93 Difference]: Finished difference Result 10841 states and 22084 transitions. [2021-05-03 15:56:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:56:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:28,468 INFO L225 Difference]: With dead ends: 10841 [2021-05-03 15:56:28,468 INFO L226 Difference]: Without dead ends: 10658 [2021-05-03 15:56:28,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 3307.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-05-03 15:56:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 4793. [2021-05-03 15:56:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4793 states, 4792 states have (on average 1.9995826377295491) internal successors, (9582), 4792 states have internal predecessors, (9582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 9582 transitions. [2021-05-03 15:56:28,575 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 9582 transitions. Word has length 47 [2021-05-03 15:56:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:28,575 INFO L480 AbstractCegarLoop]: Abstraction has 4793 states and 9582 transitions. [2021-05-03 15:56:28,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 9582 transitions. [2021-05-03 15:56:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:28,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:28,579 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:28,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 15:56:28,780 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 131 times [2021-05-03 15:56:28,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:28,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082785055] [2021-05-03 15:56:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:29,773 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:56:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082785055] [2021-05-03 15:56:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505531331] [2021-05-03 15:56:29,892 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:29,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-03 15:56:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:56:29,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-03 15:56:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:56:32,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:32,385 INFO L244 Elim1Store]: Index analysis took 171 ms [2021-05-03 15:56:32,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 60 [2021-05-03 15:56:32,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:56:32,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:56:32,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:56:32,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-05-03 15:56:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:32,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:56:32,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-05-03 15:56:32,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301242105] [2021-05-03 15:56:32,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:56:32,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:56:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:56:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:56:32,465 INFO L87 Difference]: Start difference. First operand 4793 states and 9582 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:35,801 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-05-03 15:56:36,111 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-05-03 15:56:36,492 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-05-03 15:56:36,853 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-05-03 15:56:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:36,997 INFO L93 Difference]: Finished difference Result 5671 states and 11369 transitions. [2021-05-03 15:56:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:56:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:37,007 INFO L225 Difference]: With dead ends: 5671 [2021-05-03 15:56:37,007 INFO L226 Difference]: Without dead ends: 5636 [2021-05-03 15:56:37,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 3892.8ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:56:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-05-03 15:56:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4169. [2021-05-03 15:56:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4168 states have (on average 2.001679462571977) internal successors, (8343), 4168 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 8343 transitions. [2021-05-03 15:56:37,060 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 8343 transitions. Word has length 47 [2021-05-03 15:56:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:37,060 INFO L480 AbstractCegarLoop]: Abstraction has 4169 states and 8343 transitions. [2021-05-03 15:56:37,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 8343 transitions. [2021-05-03 15:56:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:37,064 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:37,064 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:37,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 15:56:37,265 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 132 times [2021-05-03 15:56:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:37,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835478032] [2021-05-03 15:56:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:38,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835478032] [2021-05-03 15:56:38,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641315824] [2021-05-03 15:56:38,433 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:38,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 15:56:38,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:56:38,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:56:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:56:41,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:41,621 INFO L244 Elim1Store]: Index analysis took 209 ms [2021-05-03 15:56:41,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:56:41,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:56:41,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:56:41,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:56:41,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:56:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:41,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:56:41,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:56:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824628896] [2021-05-03 15:56:41,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:56:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:56:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:56:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:41,712 INFO L87 Difference]: Start difference. First operand 4169 states and 8343 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:45,549 INFO L93 Difference]: Finished difference Result 8665 states and 17702 transitions. [2021-05-03 15:56:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:56:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:45,562 INFO L225 Difference]: With dead ends: 8665 [2021-05-03 15:56:45,562 INFO L226 Difference]: Without dead ends: 8497 [2021-05-03 15:56:45,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3517.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:56:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2021-05-03 15:56:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 4322. [2021-05-03 15:56:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 1.9956028697060866) internal successors, (8623), 4321 states have internal predecessors, (8623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 8623 transitions. [2021-05-03 15:56:45,624 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 8623 transitions. Word has length 47 [2021-05-03 15:56:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:45,624 INFO L480 AbstractCegarLoop]: Abstraction has 4322 states and 8623 transitions. [2021-05-03 15:56:45,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 8623 transitions. [2021-05-03 15:56:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:45,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:45,628 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:45,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:45,828 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 133 times [2021-05-03 15:56:45,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:45,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861361468] [2021-05-03 15:56:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:46,642 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:56:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861361468] [2021-05-03 15:56:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161807564] [2021-05-03 15:56:46,774 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:46,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:56:46,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:56:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:50,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:50,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:56:50,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:50,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:56:50,012 INFO L244 Elim1Store]: Index analysis took 249 ms [2021-05-03 15:56:50,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:56:50,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:56:50,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:56:50,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:56:50,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:56:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:50,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:56:50,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-05-03 15:56:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579986782] [2021-05-03 15:56:50,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:56:50,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:56:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:56:50,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:56:50,104 INFO L87 Difference]: Start difference. First operand 4322 states and 8623 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:53,428 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-05-03 15:56:53,825 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-05-03 15:56:54,212 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2021-05-03 15:56:54,641 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-05-03 15:56:55,048 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-05-03 15:56:55,492 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-05-03 15:56:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:56:55,682 INFO L93 Difference]: Finished difference Result 5967 states and 11931 transitions. [2021-05-03 15:56:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:56:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:56:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:56:55,691 INFO L225 Difference]: With dead ends: 5967 [2021-05-03 15:56:55,692 INFO L226 Difference]: Without dead ends: 5569 [2021-05-03 15:56:55,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4715.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:56:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-05-03 15:56:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4353. [2021-05-03 15:56:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 1.989889705882353) internal successors, (8660), 4352 states have internal predecessors, (8660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 8660 transitions. [2021-05-03 15:56:55,742 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 8660 transitions. Word has length 47 [2021-05-03 15:56:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:56:55,742 INFO L480 AbstractCegarLoop]: Abstraction has 4353 states and 8660 transitions. [2021-05-03 15:56:55,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:56:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 8660 transitions. [2021-05-03 15:56:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:56:55,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:56:55,746 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:56:55,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 15:56:55,961 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:56:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:56:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 134 times [2021-05-03 15:56:55,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:56:55,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850881555] [2021-05-03 15:56:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:56:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:56:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:56:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850881555] [2021-05-03 15:56:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513065816] [2021-05-03 15:56:57,261 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:56:57,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:56:57,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:56:57,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:56:57,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:57:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:00,486 INFO L244 Elim1Store]: Index analysis took 227 ms [2021-05-03 15:57:00,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:57:00,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:57:00,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:57:00,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:57:00,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:57:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:00,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:57:00,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-05-03 15:57:00,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148233503] [2021-05-03 15:57:00,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 15:57:00,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:57:00,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 15:57:00,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:57:00,580 INFO L87 Difference]: Start difference. First operand 4353 states and 8660 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:57:04,690 INFO L93 Difference]: Finished difference Result 9072 states and 18414 transitions. [2021-05-03 15:57:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:57:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:57:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:57:04,704 INFO L225 Difference]: With dead ends: 9072 [2021-05-03 15:57:04,705 INFO L226 Difference]: Without dead ends: 8933 [2021-05-03 15:57:04,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3714.4ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:57:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-05-03 15:57:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 3597. [2021-05-03 15:57:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 2.003058954393771) internal successors, (7203), 3596 states have internal predecessors, (7203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 7203 transitions. [2021-05-03 15:57:04,780 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 7203 transitions. Word has length 47 [2021-05-03 15:57:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:57:04,780 INFO L480 AbstractCegarLoop]: Abstraction has 3597 states and 7203 transitions. [2021-05-03 15:57:04,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 7203 transitions. [2021-05-03 15:57:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:57:04,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:57:04,784 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:57:04,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:57:04,999 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:57:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:57:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1094337205, now seen corresponding path program 135 times [2021-05-03 15:57:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:57:05,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581819593] [2021-05-03 15:57:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:57:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:57:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581819593] [2021-05-03 15:57:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034163024] [2021-05-03 15:57:06,285 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:57:06,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-03 15:57:06,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:57:06,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-03 15:57:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:57:10,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:10,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:10,362 INFO L244 Elim1Store]: Index analysis took 227 ms [2021-05-03 15:57:10,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:57:10,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:57:10,426 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-05-03 15:57:10,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:57:10,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-05-03 15:57:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:10,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:57:10,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:57:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446842916] [2021-05-03 15:57:10,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:57:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:57:10,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:57:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:57:10,495 INFO L87 Difference]: Start difference. First operand 3597 states and 7203 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:12,309 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-05-03 15:57:13,030 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 15:57:13,508 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-05-03 15:57:14,123 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-05-03 15:57:14,629 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 15:57:14,915 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-05-03 15:57:15,350 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 15:57:16,384 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-05-03 15:57:16,893 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-05-03 15:57:17,279 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-05-03 15:57:17,535 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-03 15:57:17,854 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-05-03 15:57:18,473 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-05-03 15:57:18,774 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 15:57:19,484 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-05-03 15:57:20,146 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-05-03 15:57:20,650 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-05-03 15:57:21,042 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-05-03 15:57:22,220 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-05-03 15:57:22,738 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-05-03 15:57:23,168 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-05-03 15:57:23,529 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2021-05-03 15:57:24,212 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-05-03 15:57:24,706 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-05-03 15:57:25,256 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2021-05-03 15:57:25,692 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-03 15:57:26,232 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-05-03 15:57:26,678 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-05-03 15:57:27,300 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 15:57:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:57:27,444 INFO L93 Difference]: Finished difference Result 8636 states and 17517 transitions. [2021-05-03 15:57:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 15:57:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:57:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:57:27,458 INFO L225 Difference]: With dead ends: 8636 [2021-05-03 15:57:27,458 INFO L226 Difference]: Without dead ends: 8034 [2021-05-03 15:57:27,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 12428.5ms TimeCoverageRelationStatistics Valid=355, Invalid=4201, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 15:57:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8034 states. [2021-05-03 15:57:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8034 to 3900. [2021-05-03 15:57:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.004360092331367) internal successors, (7815), 3899 states have internal predecessors, (7815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 7815 transitions. [2021-05-03 15:57:27,517 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 7815 transitions. Word has length 47 [2021-05-03 15:57:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:57:27,517 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 7815 transitions. [2021-05-03 15:57:27,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 7815 transitions. [2021-05-03 15:57:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:57:27,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:57:27,521 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:57:27,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:57:27,722 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:57:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:57:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1220093915, now seen corresponding path program 136 times [2021-05-03 15:57:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:57:27,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189290864] [2021-05-03 15:57:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:57:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:57:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:29,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189290864] [2021-05-03 15:57:29,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943868118] [2021-05-03 15:57:29,300 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:57:29,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:57:29,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:57:29,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:57:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:57:32,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:32,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:32,378 INFO L244 Elim1Store]: Index analysis took 210 ms [2021-05-03 15:57:32,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:57:32,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:57:32,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:57:32,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:57:32,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:57:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:32,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:57:32,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 15:57:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007725628] [2021-05-03 15:57:32,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:57:32,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:57:32,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:57:32,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:57:32,472 INFO L87 Difference]: Start difference. First operand 3900 states and 7815 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:57:36,334 INFO L93 Difference]: Finished difference Result 7504 states and 15153 transitions. [2021-05-03 15:57:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:57:36,338 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:57:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:57:36,349 INFO L225 Difference]: With dead ends: 7504 [2021-05-03 15:57:36,349 INFO L226 Difference]: Without dead ends: 7474 [2021-05-03 15:57:36,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3797.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:57:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-05-03 15:57:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 3941. [2021-05-03 15:57:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 2.00507614213198) internal successors, (7900), 3940 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 7900 transitions. [2021-05-03 15:57:36,415 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 7900 transitions. Word has length 47 [2021-05-03 15:57:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:57:36,415 INFO L480 AbstractCegarLoop]: Abstraction has 3941 states and 7900 transitions. [2021-05-03 15:57:36,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 7900 transitions. [2021-05-03 15:57:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:57:36,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:57:36,419 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:57:36,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:57:36,620 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:57:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:57:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1159154923, now seen corresponding path program 137 times [2021-05-03 15:57:36,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:57:36,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868814000] [2021-05-03 15:57:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:57:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:57:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:38,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868814000] [2021-05-03 15:57:38,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527040178] [2021-05-03 15:57:38,221 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:57:38,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:57:38,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:57:38,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-03 15:57:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:57:40,809 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 15:57:42,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:42,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:43,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:43,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:57:43,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:57:43,102 INFO L244 Elim1Store]: Index analysis took 277 ms [2021-05-03 15:57:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 48 [2021-05-03 15:57:43,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:57:43,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:57:43,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:57:43,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:124, output treesize:3 [2021-05-03 15:57:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:57:43,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:57:43,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-05-03 15:57:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869970348] [2021-05-03 15:57:43,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 15:57:43,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:57:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 15:57:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:57:43,269 INFO L87 Difference]: Start difference. First operand 3941 states and 7900 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:57:44,987 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 15:57:45,658 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-03 15:57:46,170 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 15:57:47,197 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 15:57:47,984 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 15:57:48,515 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-05-03 15:57:48,838 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-05-03 15:57:49,595 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-05-03 15:57:50,301 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-05-03 15:57:50,844 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-05-03 15:57:51,217 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 15:57:51,926 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-05-03 15:57:52,529 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 15:57:52,925 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-05-03 15:57:53,432 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-05-03 15:57:54,205 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-05-03 15:57:55,210 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-05-03 15:57:55,851 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-05-03 15:57:56,483 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-05-03 15:57:57,162 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2021-05-03 15:57:57,833 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 62 [2021-05-03 15:57:58,413 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-05-03 15:57:59,588 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2021-05-03 15:58:00,549 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-05-03 15:58:02,017 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 71 [2021-05-03 15:58:02,932 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-05-03 15:58:04,035 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 65 [2021-05-03 15:58:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:58:06,108 INFO L93 Difference]: Finished difference Result 9815 states and 19757 transitions. [2021-05-03 15:58:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 15:58:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:58:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:58:06,126 INFO L225 Difference]: With dead ends: 9815 [2021-05-03 15:58:06,126 INFO L226 Difference]: Without dead ends: 9187 [2021-05-03 15:58:06,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 16303.6ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 15:58:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-05-03 15:58:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 4094. [2021-05-03 15:58:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 1.9980454434400194) internal successors, (8178), 4093 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 8178 transitions. [2021-05-03 15:58:06,203 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 8178 transitions. Word has length 47 [2021-05-03 15:58:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:58:06,203 INFO L480 AbstractCegarLoop]: Abstraction has 4094 states and 8178 transitions. [2021-05-03 15:58:06,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 8178 transitions. [2021-05-03 15:58:06,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:58:06,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:58:06,207 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:58:06,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:06,407 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:58:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:58:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1068866587, now seen corresponding path program 138 times [2021-05-03 15:58:06,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:58:06,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082960545] [2021-05-03 15:58:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:58:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:58:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:08,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082960545] [2021-05-03 15:58:08,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169344007] [2021-05-03 15:58:08,409 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:08,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 15:58:08,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:58:08,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-03 15:58:08,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:58:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:12,570 INFO L244 Elim1Store]: Index analysis took 300 ms [2021-05-03 15:58:12,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 60 [2021-05-03 15:58:12,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:58:12,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:58:12,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:58:12,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-05-03 15:58:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:12,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:58:12,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 15:58:12,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318815679] [2021-05-03 15:58:12,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:58:12,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:58:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:58:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:58:12,688 INFO L87 Difference]: Start difference. First operand 4094 states and 8178 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:58:17,564 INFO L93 Difference]: Finished difference Result 8603 states and 17407 transitions. [2021-05-03 15:58:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:58:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:58:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:58:17,582 INFO L225 Difference]: With dead ends: 8603 [2021-05-03 15:58:17,582 INFO L226 Difference]: Without dead ends: 8533 [2021-05-03 15:58:17,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 5011.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:58:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2021-05-03 15:58:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 4058. [2021-05-03 15:58:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 1.9980280995809712) internal successors, (8106), 4057 states have internal predecessors, (8106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 8106 transitions. [2021-05-03 15:58:17,657 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 8106 transitions. Word has length 47 [2021-05-03 15:58:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:58:17,657 INFO L480 AbstractCegarLoop]: Abstraction has 4058 states and 8106 transitions. [2021-05-03 15:58:17,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 8106 transitions. [2021-05-03 15:58:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:58:17,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:58:17,661 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:58:17,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:17,862 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:58:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:58:17,862 INFO L82 PathProgramCache]: Analyzing trace with hash -911669589, now seen corresponding path program 139 times [2021-05-03 15:58:17,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:58:17,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692872650] [2021-05-03 15:58:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:58:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:58:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:19,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692872650] [2021-05-03 15:58:19,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173624773] [2021-05-03 15:58:19,773 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:58:19,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:58:19,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:58:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:24,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:24,085 INFO L244 Elim1Store]: Index analysis took 306 ms [2021-05-03 15:58:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:58:24,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:58:24,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:58:24,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:58:24,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:58:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:24,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:58:24,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 15:58:24,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219237893] [2021-05-03 15:58:24,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:58:24,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:58:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:58:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:58:24,223 INFO L87 Difference]: Start difference. First operand 4058 states and 8106 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:58:30,611 INFO L93 Difference]: Finished difference Result 8306 states and 16720 transitions. [2021-05-03 15:58:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:58:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:58:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:58:30,631 INFO L225 Difference]: With dead ends: 8306 [2021-05-03 15:58:30,631 INFO L226 Difference]: Without dead ends: 8276 [2021-05-03 15:58:30,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 5047.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:58:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-05-03 15:58:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 4043. [2021-05-03 15:58:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 1.9980207817911926) internal successors, (8076), 4042 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 8076 transitions. [2021-05-03 15:58:30,720 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 8076 transitions. Word has length 47 [2021-05-03 15:58:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:58:30,720 INFO L480 AbstractCegarLoop]: Abstraction has 4043 states and 8076 transitions. [2021-05-03 15:58:30,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 8076 transitions. [2021-05-03 15:58:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:58:30,726 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:58:30,727 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:58:30,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 15:58:30,927 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:58:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:58:30,928 INFO L82 PathProgramCache]: Analyzing trace with hash -850953189, now seen corresponding path program 140 times [2021-05-03 15:58:30,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:58:30,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355744531] [2021-05-03 15:58:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:58:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:58:32,524 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:58:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:32,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355744531] [2021-05-03 15:58:32,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925816738] [2021-05-03 15:58:32,723 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:32,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:58:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:58:32,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:58:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:58:35,045 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 15:58:35,630 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 15:58:35,939 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 15:58:36,289 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 15:58:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:36,948 INFO L244 Elim1Store]: Index analysis took 293 ms [2021-05-03 15:58:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:58:36,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:58:36,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:58:37,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:58:37,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:58:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:37,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:58:37,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-05-03 15:58:37,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755199757] [2021-05-03 15:58:37,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 15:58:37,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:58:37,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 15:58:37,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:58:37,090 INFO L87 Difference]: Start difference. First operand 4043 states and 8076 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:40,364 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-05-03 15:58:40,777 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-05-03 15:58:41,175 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2021-05-03 15:58:41,615 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-05-03 15:58:42,075 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-05-03 15:58:42,521 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-05-03 15:58:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:58:42,690 INFO L93 Difference]: Finished difference Result 5748 states and 11466 transitions. [2021-05-03 15:58:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:58:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:58:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:58:42,699 INFO L225 Difference]: With dead ends: 5748 [2021-05-03 15:58:42,699 INFO L226 Difference]: Without dead ends: 5334 [2021-05-03 15:58:42,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 6617.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:58:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-05-03 15:58:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4216. [2021-05-03 15:58:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4216 states, 4215 states have (on average 1.9812574139976276) internal successors, (8351), 4215 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 8351 transitions. [2021-05-03 15:58:42,741 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 8351 transitions. Word has length 47 [2021-05-03 15:58:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:58:42,741 INFO L480 AbstractCegarLoop]: Abstraction has 4216 states and 8351 transitions. [2021-05-03 15:58:42,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 8351 transitions. [2021-05-03 15:58:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:58:42,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:58:42,744 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:58:42,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 15:58:42,944 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:58:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:58:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1696605301, now seen corresponding path program 141 times [2021-05-03 15:58:42,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:58:42,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770996940] [2021-05-03 15:58:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:58:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:58:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:44,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770996940] [2021-05-03 15:58:44,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039163618] [2021-05-03 15:58:44,733 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:44,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-03 15:58:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:58:44,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-03 15:58:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:58:47,106 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 15:58:47,452 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 15:58:47,749 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 15:58:48,057 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 15:58:48,389 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 15:58:48,735 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 15:58:49,100 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 15:58:49,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:58:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:58:49,534 INFO L244 Elim1Store]: Index analysis took 356 ms [2021-05-03 15:58:49,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 60 [2021-05-03 15:58:49,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:58:49,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:58:49,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:58:49,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-05-03 15:58:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:49,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:58:49,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 15:58:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593215846] [2021-05-03 15:58:49,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:58:49,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:58:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:58:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:58:49,689 INFO L87 Difference]: Start difference. First operand 4216 states and 8351 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:58:53,661 INFO L93 Difference]: Finished difference Result 6821 states and 13741 transitions. [2021-05-03 15:58:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:58:53,666 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:58:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:58:53,677 INFO L225 Difference]: With dead ends: 6821 [2021-05-03 15:58:53,677 INFO L226 Difference]: Without dead ends: 6447 [2021-05-03 15:58:53,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 5468.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:58:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-05-03 15:58:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4381. [2021-05-03 15:58:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 1.9794520547945205) internal successors, (8670), 4380 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 8670 transitions. [2021-05-03 15:58:53,746 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 8670 transitions. Word has length 47 [2021-05-03 15:58:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:58:53,746 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 8670 transitions. [2021-05-03 15:58:53,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:58:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 8670 transitions. [2021-05-03 15:58:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:58:53,750 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:58:53,751 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:58:53,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 15:58:53,951 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:58:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:58:53,952 INFO L82 PathProgramCache]: Analyzing trace with hash 617825819, now seen corresponding path program 142 times [2021-05-03 15:58:53,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:58:53,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073099890] [2021-05-03 15:58:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:58:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:58:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:58:56,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073099890] [2021-05-03 15:58:56,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828256705] [2021-05-03 15:58:56,045 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:58:56,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:58:56,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:58:56,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:58:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:58:58,451 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 15:59:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:00,958 INFO L244 Elim1Store]: Index analysis took 314 ms [2021-05-03 15:59:00,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:59:00,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:59:01,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:59:01,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:59:01,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:59:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:01,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:59:01,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 15:59:01,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553458505] [2021-05-03 15:59:01,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:59:01,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:59:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:59:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:59:01,115 INFO L87 Difference]: Start difference. First operand 4381 states and 8670 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:59:03,573 INFO L93 Difference]: Finished difference Result 5594 states and 11164 transitions. [2021-05-03 15:59:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:59:03,579 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:59:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:59:03,586 INFO L225 Difference]: With dead ends: 5594 [2021-05-03 15:59:03,586 INFO L226 Difference]: Without dead ends: 5571 [2021-05-03 15:59:03,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 5685.0ms TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:59:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-05-03 15:59:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 4381. [2021-05-03 15:59:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 1.9794520547945205) internal successors, (8670), 4380 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 8670 transitions. [2021-05-03 15:59:03,653 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 8670 transitions. Word has length 47 [2021-05-03 15:59:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:59:03,653 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 8670 transitions. [2021-05-03 15:59:03,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 8670 transitions. [2021-05-03 15:59:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:59:03,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:59:03,658 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:59:03,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 15:59:03,859 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:59:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:59:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1819901717, now seen corresponding path program 143 times [2021-05-03 15:59:03,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:59:03,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745209455] [2021-05-03 15:59:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:59:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:59:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:05,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745209455] [2021-05-03 15:59:05,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713084587] [2021-05-03 15:59:05,680 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:59:05,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:59:05,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:59:05,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:59:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:59:10,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:10,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:10,542 INFO L244 Elim1Store]: Index analysis took 348 ms [2021-05-03 15:59:10,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:59:10,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:59:10,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:59:10,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:59:10,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:59:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:10,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:59:10,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 15:59:10,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702005719] [2021-05-03 15:59:10,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:59:10,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:59:10,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:59:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:59:10,693 INFO L87 Difference]: Start difference. First operand 4381 states and 8670 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:59:14,603 INFO L93 Difference]: Finished difference Result 6296 states and 12603 transitions. [2021-05-03 15:59:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:59:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:59:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:59:14,618 INFO L225 Difference]: With dead ends: 6296 [2021-05-03 15:59:14,618 INFO L226 Difference]: Without dead ends: 6251 [2021-05-03 15:59:14,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 5363.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:59:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-05-03 15:59:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 4402. [2021-05-03 15:59:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 4401 states have (on average 1.9795501022494888) internal successors, (8712), 4401 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 8712 transitions. [2021-05-03 15:59:14,690 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 8712 transitions. Word has length 47 [2021-05-03 15:59:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:59:14,690 INFO L480 AbstractCegarLoop]: Abstraction has 4402 states and 8712 transitions. [2021-05-03 15:59:14,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 8712 transitions. [2021-05-03 15:59:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:59:14,695 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:59:14,695 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:59:14,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:59:14,896 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:59:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:59:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1521242571, now seen corresponding path program 144 times [2021-05-03 15:59:14,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:59:14,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210976340] [2021-05-03 15:59:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:59:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:59:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:59:16,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210976340] [2021-05-03 15:59:16,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120844082] [2021-05-03 15:59:16,388 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:59:16,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 15:59:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:59:16,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:59:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:59:18,422 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 15:59:18,724 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 15:59:19,013 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 15:59:19,581 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 15:59:19,908 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 15:59:20,228 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 15:59:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:21,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:21,454 INFO L244 Elim1Store]: Index analysis took 373 ms [2021-05-03 15:59:21,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:59:21,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:59:21,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:59:21,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:59:21,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:59:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:21,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:59:21,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-05-03 15:59:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056363281] [2021-05-03 15:59:21,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:59:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:59:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:59:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:59:21,630 INFO L87 Difference]: Start difference. First operand 4402 states and 8712 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:26,160 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-05-03 15:59:26,753 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-05-03 15:59:27,341 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-05-03 15:59:27,745 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-05-03 15:59:28,463 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-05-03 15:59:28,942 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-05-03 15:59:29,723 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-05-03 15:59:30,412 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-05-03 15:59:30,751 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-05-03 15:59:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:59:30,983 INFO L93 Difference]: Finished difference Result 5735 states and 11394 transitions. [2021-05-03 15:59:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:59:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:59:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:59:30,996 INFO L225 Difference]: With dead ends: 5735 [2021-05-03 15:59:30,996 INFO L226 Difference]: Without dead ends: 5698 [2021-05-03 15:59:30,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 7865.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:59:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2021-05-03 15:59:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 4247. [2021-05-03 15:59:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 4246 states have (on average 1.9762129062647198) internal successors, (8391), 4246 states have internal predecessors, (8391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 8391 transitions. [2021-05-03 15:59:31,049 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 8391 transitions. Word has length 47 [2021-05-03 15:59:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:59:31,049 INFO L480 AbstractCegarLoop]: Abstraction has 4247 states and 8391 transitions. [2021-05-03 15:59:31,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 8391 transitions. [2021-05-03 15:59:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:59:31,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:59:31,053 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:59:31,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-03 15:59:31,254 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:59:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:59:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 495186011, now seen corresponding path program 145 times [2021-05-03 15:59:31,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:59:31,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576703125] [2021-05-03 15:59:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:59:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:59:32,821 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:59:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:33,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576703125] [2021-05-03 15:59:33,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966236664] [2021-05-03 15:59:33,066 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:59:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:59:33,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:59:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:59:35,633 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 15:59:35,951 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 15:59:36,268 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 15:59:36,595 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 15:59:36,941 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 15:59:37,380 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 15:59:37,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:37,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:37,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:38,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:38,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:38,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:38,220 INFO L244 Elim1Store]: Index analysis took 380 ms [2021-05-03 15:59:38,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:59:38,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:59:38,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:59:38,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:59:38,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:59:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:38,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:59:38,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-05-03 15:59:38,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149130792] [2021-05-03 15:59:38,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 15:59:38,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:59:38,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 15:59:38,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:59:38,391 INFO L87 Difference]: Start difference. First operand 4247 states and 8391 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:41,268 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-05-03 15:59:41,706 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-05-03 15:59:42,136 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-05-03 15:59:42,598 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-05-03 15:59:43,084 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-05-03 15:59:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:59:43,244 INFO L93 Difference]: Finished difference Result 5627 states and 11181 transitions. [2021-05-03 15:59:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:59:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:59:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:59:43,255 INFO L225 Difference]: With dead ends: 5627 [2021-05-03 15:59:43,255 INFO L226 Difference]: Without dead ends: 5254 [2021-05-03 15:59:43,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 7169.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:59:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2021-05-03 15:59:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 4210. [2021-05-03 15:59:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4209 states have (on average 1.9657875980042765) internal successors, (8274), 4209 states have internal predecessors, (8274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 8274 transitions. [2021-05-03 15:59:43,316 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 8274 transitions. Word has length 47 [2021-05-03 15:59:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:59:43,316 INFO L480 AbstractCegarLoop]: Abstraction has 4210 states and 8274 transitions. [2021-05-03 15:59:43,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 8274 transitions. [2021-05-03 15:59:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:59:43,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:59:43,321 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:59:43,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:59:43,521 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:59:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:59:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1207797195, now seen corresponding path program 146 times [2021-05-03 15:59:43,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:59:43,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365493994] [2021-05-03 15:59:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:59:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:59:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:59:45,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365493994] [2021-05-03 15:59:45,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111852132] [2021-05-03 15:59:45,055 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:59:45,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:59:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:59:45,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 15:59:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:59:47,714 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 15:59:48,000 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 15:59:48,290 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 15:59:48,598 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 15:59:48,941 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 15:59:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:49,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:50,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:59:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:59:50,094 INFO L244 Elim1Store]: Index analysis took 352 ms [2021-05-03 15:59:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 15:59:50,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:59:50,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:59:50,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:59:50,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 15:59:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:59:50,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:59:50,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-05-03 15:59:50,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48634186] [2021-05-03 15:59:50,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 15:59:50,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:59:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 15:59:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:59:50,255 INFO L87 Difference]: Start difference. First operand 4210 states and 8274 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:59:55,218 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-05-03 15:59:55,654 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-05-03 15:59:56,381 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-05-03 15:59:56,910 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-05-03 15:59:57,850 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-05-03 15:59:58,644 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-05-03 15:59:59,120 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-05-03 15:59:59,555 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-05-03 15:59:59,993 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-05-03 16:00:00,906 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-05-03 16:00:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:00:01,200 INFO L93 Difference]: Finished difference Result 6691 states and 13282 transitions. [2021-05-03 16:00:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:00:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:00:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:00:01,215 INFO L225 Difference]: With dead ends: 6691 [2021-05-03 16:00:01,215 INFO L226 Difference]: Without dead ends: 6269 [2021-05-03 16:00:01,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 8495.0ms TimeCoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 16:00:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-05-03 16:00:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4633. [2021-05-03 16:00:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 1.9602763385146804) internal successors, (9080), 4632 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 9080 transitions. [2021-05-03 16:00:01,279 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 9080 transitions. Word has length 47 [2021-05-03 16:00:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:00:01,280 INFO L480 AbstractCegarLoop]: Abstraction has 4633 states and 9080 transitions. [2021-05-03 16:00:01,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 9080 transitions. [2021-05-03 16:00:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:00:01,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:00:01,285 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:00:01,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:00:01,485 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:00:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:00:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash 418166875, now seen corresponding path program 147 times [2021-05-03 16:00:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:00:01,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110012153] [2021-05-03 16:00:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:00:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:00:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:00:03,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110012153] [2021-05-03 16:00:03,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689546710] [2021-05-03 16:00:03,722 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:00:03,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-03 16:00:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:00:03,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-03 16:00:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:00:07,279 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:00:08,452 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:00:09,826 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:00:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:09,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:09,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:10,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:10,370 INFO L244 Elim1Store]: Index analysis took 418 ms [2021-05-03 16:00:10,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:00:10,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:00:10,485 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-05-03 16:00:10,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:00:10,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-05-03 16:00:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:00:10,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:00:10,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-05-03 16:00:10,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311952976] [2021-05-03 16:00:10,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 16:00:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:00:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 16:00:10,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:00:10,613 INFO L87 Difference]: Start difference. First operand 4633 states and 9080 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:13,243 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-05-03 16:00:13,837 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2021-05-03 16:00:14,344 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-05-03 16:00:14,949 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-05-03 16:00:15,471 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-05-03 16:00:15,984 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 16:00:17,319 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-05-03 16:00:17,818 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-05-03 16:00:18,507 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-05-03 16:00:19,171 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 16:00:19,753 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-05-03 16:00:20,383 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:00:20,957 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-05-03 16:00:21,428 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-05-03 16:00:22,128 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-03 16:00:22,858 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-05-03 16:00:23,313 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-05-03 16:00:23,996 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-03 16:00:24,872 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-05-03 16:00:26,824 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-05-03 16:00:27,504 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-05-03 16:00:28,118 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-05-03 16:00:28,639 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:00:29,328 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-05-03 16:00:29,894 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-05-03 16:00:30,569 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-05-03 16:00:31,456 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2021-05-03 16:00:33,484 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2021-05-03 16:00:34,200 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:00:34,923 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-05-03 16:00:36,014 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-05-03 16:00:36,754 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-05-03 16:00:37,505 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-05-03 16:00:38,094 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:00:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:00:38,629 INFO L93 Difference]: Finished difference Result 9301 states and 18322 transitions. [2021-05-03 16:00:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:00:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:00:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:00:38,657 INFO L225 Difference]: With dead ends: 9301 [2021-05-03 16:00:38,657 INFO L226 Difference]: Without dead ends: 8773 [2021-05-03 16:00:38,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 20469.0ms TimeCoverageRelationStatistics Valid=350, Invalid=4480, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 16:00:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-05-03 16:00:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 4964. [2021-05-03 16:00:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4963 states have (on average 1.9508361877896434) internal successors, (9682), 4963 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 9682 transitions. [2021-05-03 16:00:38,790 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 9682 transitions. Word has length 47 [2021-05-03 16:00:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:00:38,790 INFO L480 AbstractCegarLoop]: Abstraction has 4964 states and 9682 transitions. [2021-05-03 16:00:38,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 9682 transitions. [2021-05-03 16:00:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:00:38,798 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:00:38,798 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:00:38,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:00:38,999 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:00:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:00:38,999 INFO L82 PathProgramCache]: Analyzing trace with hash 762385499, now seen corresponding path program 148 times [2021-05-03 16:00:38,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:00:39,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399606130] [2021-05-03 16:00:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:00:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:00:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:00:41,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399606130] [2021-05-03 16:00:41,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236503785] [2021-05-03 16:00:41,747 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:00:41,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:00:41,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:00:41,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:00:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:00:44,193 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:00:44,567 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:00:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:00:47,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:00:47,485 INFO L244 Elim1Store]: Index analysis took 401 ms [2021-05-03 16:00:47,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:00:47,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:00:47,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:00:47,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:00:47,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:00:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:00:47,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:00:47,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 16:00:47,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920452112] [2021-05-03 16:00:47,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 16:00:47,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:00:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 16:00:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:00:47,642 INFO L87 Difference]: Start difference. First operand 4964 states and 9682 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:00:53,164 INFO L93 Difference]: Finished difference Result 7508 states and 15017 transitions. [2021-05-03 16:00:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:00:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:00:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:00:53,184 INFO L225 Difference]: With dead ends: 7508 [2021-05-03 16:00:53,184 INFO L226 Difference]: Without dead ends: 7383 [2021-05-03 16:00:53,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 6881.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:00:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-05-03 16:00:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4988. [2021-05-03 16:00:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.9510727892520554) internal successors, (9730), 4987 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 9730 transitions. [2021-05-03 16:00:53,299 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 9730 transitions. Word has length 47 [2021-05-03 16:00:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:00:53,300 INFO L480 AbstractCegarLoop]: Abstraction has 4988 states and 9730 transitions. [2021-05-03 16:00:53,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:00:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 9730 transitions. [2021-05-03 16:00:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:00:53,308 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:00:53,308 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:00:53,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:00:53,509 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:00:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:00:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 789635371, now seen corresponding path program 149 times [2021-05-03 16:00:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:00:53,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756917991] [2021-05-03 16:00:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:00:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:00:55,431 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 16:00:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:00:55,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756917991] [2021-05-03 16:00:55,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673474138] [2021-05-03 16:00:55,700 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:00:55,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-03 16:00:55,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:00:55,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-03 16:00:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:00:57,988 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:00:58,277 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:00:58,629 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:00:58,953 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:00:59,289 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:00:59,634 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:01:00,024 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 16:01:00,405 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:01:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:01,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:01,233 INFO L244 Elim1Store]: Index analysis took 358 ms [2021-05-03 16:01:01,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 60 [2021-05-03 16:01:01,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:01:01,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:01:01,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:01:01,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-05-03 16:01:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:01,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:01:01,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-05-03 16:01:01,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893221450] [2021-05-03 16:01:01,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 16:01:01,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:01:01,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 16:01:01,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:01:01,397 INFO L87 Difference]: Start difference. First operand 4988 states and 9730 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:04,712 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-05-03 16:01:05,267 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-05-03 16:01:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:01:05,684 INFO L93 Difference]: Finished difference Result 6692 states and 13174 transitions. [2021-05-03 16:01:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:01:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:01:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:01:05,705 INFO L225 Difference]: With dead ends: 6692 [2021-05-03 16:01:05,706 INFO L226 Difference]: Without dead ends: 6396 [2021-05-03 16:01:05,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 6924.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:01:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2021-05-03 16:01:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 5273. [2021-05-03 16:01:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.9493550834597875) internal successors, (10277), 5272 states have internal predecessors, (10277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 10277 transitions. [2021-05-03 16:01:05,809 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 10277 transitions. Word has length 47 [2021-05-03 16:01:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:01:05,809 INFO L480 AbstractCegarLoop]: Abstraction has 5273 states and 10277 transitions. [2021-05-03 16:01:05,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 10277 transitions. [2021-05-03 16:01:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:01:05,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:01:05,815 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:01:06,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:01:06,015 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:01:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:01:06,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1914195755, now seen corresponding path program 150 times [2021-05-03 16:01:06,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:01:06,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191781987] [2021-05-03 16:01:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:01:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:01:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:08,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191781987] [2021-05-03 16:01:08,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920577494] [2021-05-03 16:01:08,320 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:01:08,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 16:01:08,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:01:08,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:01:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:01:10,833 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:01:11,137 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:01:11,469 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:01:11,776 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:01:12,100 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:01:12,444 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:01:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:13,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:13,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:14,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:14,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:14,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:14,019 INFO L244 Elim1Store]: Index analysis took 419 ms [2021-05-03 16:01:14,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:01:14,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:01:14,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:01:14,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:01:14,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:01:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:14,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:01:14,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-05-03 16:01:14,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86135226] [2021-05-03 16:01:14,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 16:01:14,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:01:14,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 16:01:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:01:14,207 INFO L87 Difference]: Start difference. First operand 5273 states and 10277 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:01:19,571 INFO L93 Difference]: Finished difference Result 8503 states and 16847 transitions. [2021-05-03 16:01:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:01:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:01:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:01:19,597 INFO L225 Difference]: With dead ends: 8503 [2021-05-03 16:01:19,597 INFO L226 Difference]: Without dead ends: 8443 [2021-05-03 16:01:19,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 6510.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:01:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8443 states. [2021-05-03 16:01:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8443 to 5222. [2021-05-03 16:01:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 1.94771116644321) internal successors, (10169), 5221 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 10169 transitions. [2021-05-03 16:01:19,706 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 10169 transitions. Word has length 47 [2021-05-03 16:01:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:01:19,706 INFO L480 AbstractCegarLoop]: Abstraction has 5222 states and 10169 transitions. [2021-05-03 16:01:19,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 10169 transitions. [2021-05-03 16:01:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:01:19,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:01:19,713 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:01:19,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-03 16:01:19,913 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:01:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:01:19,914 INFO L82 PathProgramCache]: Analyzing trace with hash 284966187, now seen corresponding path program 151 times [2021-05-03 16:01:19,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:01:19,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336191144] [2021-05-03 16:01:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:01:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:01:20,656 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 16:01:20,820 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:01:21,348 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:01:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336191144] [2021-05-03 16:01:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359741848] [2021-05-03 16:01:22,720 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:01:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:01:22,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:01:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:01:24,765 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:01:25,132 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:01:25,478 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:01:25,797 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:01:26,151 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:01:26,537 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:01:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:28,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:29,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:29,041 INFO L244 Elim1Store]: Index analysis took 435 ms [2021-05-03 16:01:29,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:01:29,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:01:29,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:01:29,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:01:29,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:01:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:29,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:01:29,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-03 16:01:29,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65360694] [2021-05-03 16:01:29,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 16:01:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:01:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 16:01:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:01:29,241 INFO L87 Difference]: Start difference. First operand 5222 states and 10169 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:01:37,623 INFO L93 Difference]: Finished difference Result 8080 states and 16026 transitions. [2021-05-03 16:01:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:01:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:01:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:01:37,643 INFO L225 Difference]: With dead ends: 8080 [2021-05-03 16:01:37,644 INFO L226 Difference]: Without dead ends: 8012 [2021-05-03 16:01:37,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 7453.7ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:01:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-05-03 16:01:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 5264. [2021-05-03 16:01:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.9481284438533155) internal successors, (10253), 5263 states have internal predecessors, (10253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 10253 transitions. [2021-05-03 16:01:37,738 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 10253 transitions. Word has length 47 [2021-05-03 16:01:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:01:37,738 INFO L480 AbstractCegarLoop]: Abstraction has 5264 states and 10253 transitions. [2021-05-03 16:01:37,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 10253 transitions. [2021-05-03 16:01:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:01:37,743 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:01:37,743 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:01:37,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:01:37,957 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:01:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:01:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2036552917, now seen corresponding path program 152 times [2021-05-03 16:01:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:01:37,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716200858] [2021-05-03 16:01:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:01:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:01:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716200858] [2021-05-03 16:01:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700814991] [2021-05-03 16:01:40,627 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:01:40,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:01:40,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:01:40,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:01:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:01:42,842 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:01:43,153 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:01:43,475 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:01:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:45,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:45,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:01:46,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:01:46,307 INFO L244 Elim1Store]: Index analysis took 366 ms [2021-05-03 16:01:46,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:01:46,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:01:46,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:01:46,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:01:46,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:01:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:46,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:01:46,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 16:01:46,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984809905] [2021-05-03 16:01:46,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 16:01:46,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:01:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 16:01:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:01:46,474 INFO L87 Difference]: Start difference. First operand 5264 states and 10253 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:01:53,086 INFO L93 Difference]: Finished difference Result 7778 states and 15422 transitions. [2021-05-03 16:01:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:01:53,092 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:01:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:01:53,104 INFO L225 Difference]: With dead ends: 7778 [2021-05-03 16:01:53,104 INFO L226 Difference]: Without dead ends: 7718 [2021-05-03 16:01:53,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 6753.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:01:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2021-05-03 16:01:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 5264. [2021-05-03 16:01:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.9481284438533155) internal successors, (10253), 5263 states have internal predecessors, (10253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 10253 transitions. [2021-05-03 16:01:53,190 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 10253 transitions. Word has length 47 [2021-05-03 16:01:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:01:53,190 INFO L480 AbstractCegarLoop]: Abstraction has 5264 states and 10253 transitions. [2021-05-03 16:01:53,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:01:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 10253 transitions. [2021-05-03 16:01:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:01:53,197 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:01:53,197 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:01:53,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 16:01:53,397 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:01:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:01:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash 991335067, now seen corresponding path program 153 times [2021-05-03 16:01:53,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:01:53,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899096069] [2021-05-03 16:01:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:01:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:01:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:01:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899096069] [2021-05-03 16:01:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695416720] [2021-05-03 16:01:55,692 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:01:55,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-03 16:01:55,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:01:55,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-03 16:01:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:02:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:02,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:02,826 INFO L244 Elim1Store]: Index analysis took 408 ms [2021-05-03 16:02:02,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 60 [2021-05-03 16:02:02,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:02:02,953 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-05-03 16:02:02,956 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-05-03 16:02:02,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:02:02,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-05-03 16:02:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:02:03,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:02:03,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-05-03 16:02:03,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310813792] [2021-05-03 16:02:03,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 16:02:03,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:02:03,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 16:02:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:02:03,117 INFO L87 Difference]: Start difference. First operand 5264 states and 10253 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:02:04,705 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-05-03 16:02:05,429 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2021-05-03 16:02:05,815 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-03 16:02:06,460 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-05-03 16:02:06,890 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-05-03 16:02:07,535 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-05-03 16:02:09,303 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2021-05-03 16:02:09,932 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-03 16:02:10,745 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-05-03 16:02:11,236 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-05-03 16:02:11,821 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-05-03 16:02:12,744 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-05-03 16:02:13,913 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-05-03 16:02:14,925 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-05-03 16:02:15,675 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-05-03 16:02:16,682 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-05-03 16:02:17,627 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-05-03 16:02:18,548 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-05-03 16:02:19,750 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2021-05-03 16:02:20,569 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-05-03 16:02:21,921 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-05-03 16:02:22,989 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-05-03 16:02:24,198 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-05-03 16:02:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:02:25,603 INFO L93 Difference]: Finished difference Result 7750 states and 15363 transitions. [2021-05-03 16:02:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 16:02:25,609 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:02:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:02:25,620 INFO L225 Difference]: With dead ends: 7750 [2021-05-03 16:02:25,620 INFO L226 Difference]: Without dead ends: 7320 [2021-05-03 16:02:25,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 18293.0ms TimeCoverageRelationStatistics Valid=326, Invalid=3456, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:02:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2021-05-03 16:02:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 5315. [2021-05-03 16:02:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 5314 states have (on average 1.9480617237485887) internal successors, (10352), 5314 states have internal predecessors, (10352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:02:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 10352 transitions. [2021-05-03 16:02:25,700 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 10352 transitions. Word has length 47 [2021-05-03 16:02:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:02:25,700 INFO L480 AbstractCegarLoop]: Abstraction has 5315 states and 10352 transitions. [2021-05-03 16:02:25,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:02:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 10352 transitions. [2021-05-03 16:02:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:02:25,705 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:02:25,705 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:02:25,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 16:02:25,906 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:02:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:02:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1427197253, now seen corresponding path program 154 times [2021-05-03 16:02:25,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:02:25,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717703475] [2021-05-03 16:02:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:02:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:02:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:02:28,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717703475] [2021-05-03 16:02:28,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150803682] [2021-05-03 16:02:28,461 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:02:28,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:02:28,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:02:28,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:02:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:02:30,918 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:02:31,216 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:02:33,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:33,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:33,668 INFO L244 Elim1Store]: Index analysis took 283 ms [2021-05-03 16:02:33,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:02:33,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:02:33,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:02:33,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:02:33,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:02:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:02:33,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:02:33,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-05-03 16:02:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878232764] [2021-05-03 16:02:33,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 16:02:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:02:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 16:02:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:02:33,790 INFO L87 Difference]: Start difference. First operand 5315 states and 10352 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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) [2021-05-03 16:02:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:02:43,351 INFO L93 Difference]: Finished difference Result 11142 states and 22429 transitions. [2021-05-03 16:02:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:02:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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 47 [2021-05-03 16:02:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:02:43,378 INFO L225 Difference]: With dead ends: 11142 [2021-05-03 16:02:43,378 INFO L226 Difference]: Without dead ends: 10920 [2021-05-03 16:02:43,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 6475.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:02:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10920 states. [2021-05-03 16:02:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10920 to 4910. [2021-05-03 16:02:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 1.9454063964147483) internal successors, (9550), 4909 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:02:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 9550 transitions. [2021-05-03 16:02:43,496 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 9550 transitions. Word has length 47 [2021-05-03 16:02:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:02:43,496 INFO L480 AbstractCegarLoop]: Abstraction has 4910 states and 9550 transitions. [2021-05-03 16:02:43,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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) [2021-05-03 16:02:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 9550 transitions. [2021-05-03 16:02:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:02:43,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:02:43,502 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:02:43,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-03 16:02:43,703 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:02:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:02:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash 887233867, now seen corresponding path program 155 times [2021-05-03 16:02:43,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:02:43,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316649875] [2021-05-03 16:02:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:02:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:02:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:02:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316649875] [2021-05-03 16:02:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384603623] [2021-05-03 16:02:46,520 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:02:46,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-03 16:02:46,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:02:46,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-03 16:02:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:02:49,258 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:02:49,772 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:02:50,269 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:02:50,892 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:02:51,485 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:02:52,015 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:02:52,565 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:02:53,209 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 16:02:53,866 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:02:54,734 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:02:55,568 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:02:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:55,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:55,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:02:56,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:02:56,183 INFO L244 Elim1Store]: Index analysis took 514 ms [2021-05-03 16:02:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 48 [2021-05-03 16:02:56,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:02:56,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:02:56,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:02:56,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:126, output treesize:3 [2021-05-03 16:02:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:02:56,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:02:56,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-05-03 16:02:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368749339] [2021-05-03 16:02:56,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 16:02:56,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:02:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 16:02:56,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:02:56,524 INFO L87 Difference]: Start difference. First operand 4910 states and 9550 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:02:58,276 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-03 16:02:58,790 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-05-03 16:02:59,793 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 16:03:01,481 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-03 16:03:02,851 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 16:03:03,787 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 16:03:04,362 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-05-03 16:03:04,950 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:03:05,910 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-03 16:03:06,441 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-05-03 16:03:07,753 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-05-03 16:03:08,401 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 16:03:09,205 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-05-03 16:03:10,480 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 16:03:11,743 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-05-03 16:03:12,610 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-05-03 16:03:13,571 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 16:03:14,163 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:03:14,911 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-05-03 16:03:16,211 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-05-03 16:03:17,022 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-05-03 16:03:17,878 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-05-03 16:03:18,875 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-05-03 16:03:19,727 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-05-03 16:03:21,064 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-05-03 16:03:22,062 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-05-03 16:03:22,599 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:03:23,404 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-05-03 16:03:24,486 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-05-03 16:03:25,335 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-05-03 16:03:25,827 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:03:26,397 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:03:26,989 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-05-03 16:03:27,337 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 16:03:27,726 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:03:28,856 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-05-03 16:03:29,841 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-03 16:03:30,209 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:03:31,077 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-05-03 16:03:31,699 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:03:32,564 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-05-03 16:03:32,992 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:03:33,813 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-05-03 16:03:34,232 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:03:35,021 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:03:35,686 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-05-03 16:03:36,499 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:03:36,913 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:03:37,457 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:03:38,180 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-03 16:03:39,234 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-03 16:03:40,380 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-05-03 16:03:40,907 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:03:41,860 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:03:42,445 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:03:43,430 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 16:03:44,131 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 16:03:44,998 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 16:03:45,716 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 16:03:46,024 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 16:03:46,778 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 16:03:47,249 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 16:03:47,866 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:03:48,718 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-05-03 16:03:49,202 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:03:50,045 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-05-03 16:03:51,030 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-05-03 16:03:51,979 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-05-03 16:03:52,818 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-05-03 16:03:53,726 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-05-03 16:03:54,693 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-05-03 16:03:55,764 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-05-03 16:03:56,631 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-05-03 16:03:58,007 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-05-03 16:03:58,822 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-05-03 16:03:59,755 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-05-03 16:04:00,516 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 16:04:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:00,604 INFO L93 Difference]: Finished difference Result 11866 states and 23502 transitions. [2021-05-03 16:04:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-03 16:04:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 16:04:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:00,630 INFO L225 Difference]: With dead ends: 11866 [2021-05-03 16:04:00,630 INFO L226 Difference]: Without dead ends: 10887 [2021-05-03 16:04:00,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3608 ImplicationChecksByTransitivity, 53547.3ms TimeCoverageRelationStatistics Valid=892, Invalid=13870, Unknown=0, NotChecked=0, Total=14762 [2021-05-03 16:04:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-05-03 16:04:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 5297. [2021-05-03 16:04:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5297 states, 5296 states have (on average 1.966012084592145) internal successors, (10412), 5296 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 10412 transitions. [2021-05-03 16:04:00,731 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 10412 transitions. Word has length 47 [2021-05-03 16:04:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:00,732 INFO L480 AbstractCegarLoop]: Abstraction has 5297 states and 10412 transitions. [2021-05-03 16:04:00,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 10412 transitions. [2021-05-03 16:04:00,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:04:00,737 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:00,737 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:00,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:00,938 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:00,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1550493669, now seen corresponding path program 156 times [2021-05-03 16:04:00,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:00,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573368468] [2021-05-03 16:04:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:03,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573368468] [2021-05-03 16:04:03,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219789379] [2021-05-03 16:04:03,708 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:03,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-03 16:04:03,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:03,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:04:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:05,409 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:04:05,756 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:04:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:09,583 INFO L244 Elim1Store]: Index analysis took 445 ms [2021-05-03 16:04:09,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:04:09,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:09,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:09,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:09,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:04:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:09,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:09,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-05-03 16:04:09,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175708193] [2021-05-03 16:04:09,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 16:04:09,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:09,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 16:04:09,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:04:09,793 INFO L87 Difference]: Start difference. First operand 5297 states and 10412 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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) [2021-05-03 16:04:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:19,924 INFO L93 Difference]: Finished difference Result 9752 states and 19414 transitions. [2021-05-03 16:04:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:04:19,932 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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 47 [2021-05-03 16:04:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:19,949 INFO L225 Difference]: With dead ends: 9752 [2021-05-03 16:04:19,949 INFO L226 Difference]: Without dead ends: 9685 [2021-05-03 16:04:19,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 7083.1ms TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:04:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-05-03 16:04:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 5309. [2021-05-03 16:04:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5309 states, 5308 states have (on average 1.9638281838733986) internal successors, (10424), 5308 states have internal predecessors, (10424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 10424 transitions. [2021-05-03 16:04:20,056 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 10424 transitions. Word has length 47 [2021-05-03 16:04:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:20,056 INFO L480 AbstractCegarLoop]: Abstraction has 5309 states and 10424 transitions. [2021-05-03 16:04:20,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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) [2021-05-03 16:04:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 10424 transitions. [2021-05-03 16:04:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 16:04:20,062 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:20,062 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:20,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-03 16:04:20,263 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1031793547, now seen corresponding path program 157 times [2021-05-03 16:04:20,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:20,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063568464] [2021-05-03 16:04:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:23,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063568464] [2021-05-03 16:04:23,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495021060] [2021-05-03 16:04:23,109 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:23,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-03 16:04:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:24,845 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:04:25,192 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:04:25,532 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:04:25,912 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:04:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:28,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:29,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:29,279 INFO L244 Elim1Store]: Index analysis took 457 ms [2021-05-03 16:04:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-05-03 16:04:29,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:29,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:29,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:29,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-05-03 16:04:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:29,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:29,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-05-03 16:04:29,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882801386] [2021-05-03 16:04:29,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 16:04:29,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 16:04:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:04:29,478 INFO L87 Difference]: Start difference. First operand 5309 states and 10424 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 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) Received shutdown request... [2021-05-03 16:04:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:04:36,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:36,789 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:04:36,798 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:04:36,798 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:04:36 BasicIcfg [2021-05-03 16:04:36,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:04:36,799 INFO L168 Benchmark]: Toolchain (without parser) took 849336.82 ms. Allocated memory was 335.5 MB in the beginning and 583.0 MB in the end (delta: 247.5 MB). Free memory was 315.6 MB in the beginning and 221.0 MB in the end (delta: 94.6 MB). Peak memory consumption was 345.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:04:36,799 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 335.5 MB. Free memory was 316.7 MB in the beginning and 316.7 MB in the end (delta: 70.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:04:36,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.78 ms. Allocated memory is still 335.5 MB. Free memory was 315.5 MB in the beginning and 314.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:04:36,799 INFO L168 Benchmark]: Boogie Preprocessor took 15.58 ms. Allocated memory is still 335.5 MB. Free memory was 314.1 MB in the beginning and 313.1 MB in the end (delta: 980.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:04:36,799 INFO L168 Benchmark]: RCFGBuilder took 383.40 ms. Allocated memory is still 335.5 MB. Free memory was 313.1 MB in the beginning and 301.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:04:36,800 INFO L168 Benchmark]: TraceAbstraction took 848891.19 ms. Allocated memory was 335.5 MB in the beginning and 583.0 MB in the end (delta: 247.5 MB). Free memory was 300.7 MB in the beginning and 221.0 MB in the end (delta: 79.7 MB). Peak memory consumption was 330.4 MB. Max. memory is 16.0 GB. [2021-05-03 16:04:36,801 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 0.11 ms. Allocated memory is still 335.5 MB. Free memory was 316.7 MB in the beginning and 316.7 MB in the end (delta: 70.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.78 ms. Allocated memory is still 335.5 MB. Free memory was 315.5 MB in the beginning and 314.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.58 ms. Allocated memory is still 335.5 MB. Free memory was 314.1 MB in the beginning and 313.1 MB in the end (delta: 980.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 383.40 ms. Allocated memory is still 335.5 MB. Free memory was 313.1 MB in the beginning and 301.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 848891.19 ms. Allocated memory was 335.5 MB in the beginning and 583.0 MB in the end (delta: 247.5 MB). Free memory was 300.7 MB in the beginning and 221.0 MB in the end (delta: 79.7 MB). Peak memory consumption was 330.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 60). Cancelled while BasicCegarLoop was constructing difference of abstraction (5309states) and FLOYD_HOARE automaton (currently 37 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (3356 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 848735.2ms, OverallIterations: 163, TraceHistogramMax: 9, EmptinessCheckTime: 442.2ms, AutomataDifference: 438169.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12950 SDtfs, 22414 SDslu, 194130 SDs, 0 SdLazy, 111300 SolverSat, 3735 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 156383.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9232 GetRequests, 4198 SyntacticMatches, 504 SemanticMatches, 4530 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37322 ImplicationChecksByTransitivity, 418027.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5315occurred in iteration=159, InterpolantAutomatonStates: 4052, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5599.4ms AutomataMinimizationTime, 162 MinimizatonAttempts, 215976 StatesRemovedByMinimization, 160 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 665.4ms SsaConstructionTime, 3015.9ms SatisfiabilityAnalysisTime, 364423.3ms InterpolantComputationTime, 12344 NumberOfCodeBlocks, 12344 NumberOfCodeBlocksAsserted, 822 NumberOfCheckSat, 12022 ConstructedInterpolants, 717 QuantifiedInterpolants, 423830 SizeOfPredicates, 185 NumberOfNonLiveVariables, 15755 ConjunctsInSsa, 8764 ConjunctsInUnsatCore, 322 InterpolantComputations, 4 PerfectInterpolantSequences, 591/28595 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