/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:58:00,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:58:00,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:58:00,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 18:58:00,648 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 [2021-08-12 18:58:00,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:58:00,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:58:00,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:58:00,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:58:00,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:58:00,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:58:00,688 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:58:00,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:58:00,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:58:00,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:58:00,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:58:00,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:58:00,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:58:00,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:58:00,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:58:00,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:58:00,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:58:00,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:58:00,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:58:00,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:58:00,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:58:00,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:58:00,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:58:00,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:58:00,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:58:00,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:58:00,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:58:00,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:58:00,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:58:00,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:58:00,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:58:01,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:58:01,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:58:01,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:58:01,023 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:58:01,024 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:58:01,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-08-12 18:58:01,025 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-08-12 18:58:01,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:58:01,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:58:01,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:58:01,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:58:01,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:58:01,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:58:01,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:58:01,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:58:01,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:58:01,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/1) ... [2021-08-12 18:58:01,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:58:01,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:58:01,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:58:01,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:58:01,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (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 [2021-08-12 18:58:01,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 18:58:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 18:58:01,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 18:58:01,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 18:58:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 18:58:01,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 18:58:01,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:58:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:58:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:58:01,171 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:58:01,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:58:01,489 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-12 18:58:01,490 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-12 18:58:01,491 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:58:01 BoogieIcfgContainer [2021-08-12 18:58:01,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:58:01,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:58:01,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:58:01,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:58:01,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:58:01" (1/2) ... [2021-08-12 18:58:01,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7598c1 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:58:01, skipping insertion in model container [2021-08-12 18:58:01,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:58:01" (2/2) ... [2021-08-12 18:58:01,497 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-08-12 18:58:01,510 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:58:01,511 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:58:01,512 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:58:01,532 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 18:58:01,567 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 18:58:01,582 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:58:01,583 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:58:01,583 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:58:01,583 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:58:01,583 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:58:01,583 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:58:01,583 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:58:01,583 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:58:01,589 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-08-12 18:58:01,600 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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) [2021-08-12 18:58:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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) [2021-08-12 18:58:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:58:01,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:01,608 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:01,608 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-08-12 18:58:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:01,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417377620] [2021-08-12 18:58:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:01,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:01,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417377620] [2021-08-12 18:58:01,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417377620] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:58:01,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:58:01,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:58:01,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095648045] [2021-08-12 18:58:01,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:58:01,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:58:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:58:01,847 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:01,905 INFO L93 Difference]: Finished difference Result 37 states and 61 transitions. [2021-08-12 18:58:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:58:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-12 18:58:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:01,916 INFO L225 Difference]: With dead ends: 37 [2021-08-12 18:58:01,916 INFO L226 Difference]: Without dead ends: 18 [2021-08-12 18:58:01,921 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:58:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-12 18:58:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-12 18:58:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-08-12 18:58:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-08-12 18:58:01,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-08-12 18:58:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:01,955 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-08-12 18:58:01,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-08-12 18:58:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:58:01,957 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:01,957 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:01,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:58:01,957 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-08-12 18:58:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:01,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72228935] [2021-08-12 18:58:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:02,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72228935] [2021-08-12 18:58:02,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72228935] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:58:02,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:58:02,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:58:02,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721413722] [2021-08-12 18:58:02,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:58:02,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:58:02,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:58:02,063 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:02,112 INFO L93 Difference]: Finished difference Result 30 states and 53 transitions. [2021-08-12 18:58:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:58:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-12 18:58:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:02,114 INFO L225 Difference]: With dead ends: 30 [2021-08-12 18:58:02,114 INFO L226 Difference]: Without dead ends: 23 [2021-08-12 18:58:02,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:58:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-12 18:58:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-12 18:58:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 18:58:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-08-12 18:58:02,124 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-08-12 18:58:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:02,125 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-08-12 18:58:02,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-08-12 18:58:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:58:02,125 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:02,126 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:02,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 18:58:02,126 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-08-12 18:58:02,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:02,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125808933] [2021-08-12 18:58:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:02,351 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-08-12 18:58:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:02,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125808933] [2021-08-12 18:58:02,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125808933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099002581] [2021-08-12 18:58:02,386 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 [2021-08-12 18:58:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:58:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:02,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 18:58:02,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:02,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:02,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:02,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-08-12 18:58:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:02,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099002581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:02,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:02,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 18:58:02,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428556799] [2021-08-12 18:58:02,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:02,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:02,682 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:02,758 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2021-08-12 18:58:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:58:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 18:58:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:02,760 INFO L225 Difference]: With dead ends: 39 [2021-08-12 18:58:02,760 INFO L226 Difference]: Without dead ends: 22 [2021-08-12 18:58:02,762 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-12 18:58:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-12 18:58:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2021-08-12 18:58:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-12 18:58:02,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-08-12 18:58:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:02,770 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-12 18:58:02,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-12 18:58:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:58:02,771 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:02,772 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:02,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 18:58:02,985 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:02,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:02,986 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-08-12 18:58:02,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:02,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96071952] [2021-08-12 18:58:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:03,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:03,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96071952] [2021-08-12 18:58:03,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96071952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:03,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002223284] [2021-08-12 18:58:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:03,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:03,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:58:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:03,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:03,339 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-08-12 18:58:03,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 18:58:03,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:03,368 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-08-12 18:58:03,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 18:58:03,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 18:58:03,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:03,448 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-08-12 18:58:03,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:03,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-08-12 18:58:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:03,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002223284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:03,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:03,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 18:58:03,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862850084] [2021-08-12 18:58:03,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:03,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:03,508 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:03,588 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2021-08-12 18:58:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:58:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 18:58:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:03,589 INFO L225 Difference]: With dead ends: 37 [2021-08-12 18:58:03,590 INFO L226 Difference]: Without dead ends: 30 [2021-08-12 18:58:03,591 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-12 18:58:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-08-12 18:58:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2021-08-12 18:58:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-12 18:58:03,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-08-12 18:58:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:03,597 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-12 18:58:03,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-12 18:58:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:58:03,598 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:03,598 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:03,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:03,813 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-08-12 18:58:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:03,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554036718] [2021-08-12 18:58:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:03,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554036718] [2021-08-12 18:58:03,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554036718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371310672] [2021-08-12 18:58:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:03,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:58:03,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:03,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:58:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:04,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:04,060 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-08-12 18:58:04,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 18:58:04,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:04,095 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-08-12 18:58:04,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 18:58:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 18:58:04,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:04,172 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-08-12 18:58:04,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:04,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-08-12 18:58:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:04,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371310672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:04,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:04,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 18:58:04,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802757598] [2021-08-12 18:58:04,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:04,222 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:04,354 INFO L93 Difference]: Finished difference Result 53 states and 91 transitions. [2021-08-12 18:58:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:58:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 18:58:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:04,356 INFO L225 Difference]: With dead ends: 53 [2021-08-12 18:58:04,356 INFO L226 Difference]: Without dead ends: 41 [2021-08-12 18:58:04,359 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:58:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-12 18:58:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-08-12 18:58:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) 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) [2021-08-12 18:58:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-08-12 18:58:04,368 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-08-12 18:58:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:04,368 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-08-12 18:58:04,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-08-12 18:58:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:58:04,370 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:04,371 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:04,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 18:58:04,589 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-08-12 18:58:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931731524] [2021-08-12 18:58:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:04,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:04,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931731524] [2021-08-12 18:58:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931731524] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:58:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:58:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:58:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390559998] [2021-08-12 18:58:04,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:58:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:58:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:58:04,611 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2021-08-12 18:58:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:04,626 INFO L93 Difference]: Finished difference Result 38 states and 67 transitions. [2021-08-12 18:58:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:58:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 [2021-08-12 18:58:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:04,627 INFO L225 Difference]: With dead ends: 38 [2021-08-12 18:58:04,627 INFO L226 Difference]: Without dead ends: 29 [2021-08-12 18:58:04,627 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:58:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-12 18:58:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-12 18:58:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2021-08-12 18:58:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-08-12 18:58:04,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-08-12 18:58:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:04,631 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-08-12 18:58:04,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) 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) [2021-08-12 18:58:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-08-12 18:58:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:58:04,631 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:04,631 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:04,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-12 18:58:04,632 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-08-12 18:58:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:04,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429362600] [2021-08-12 18:58:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:04,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:04,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429362600] [2021-08-12 18:58:04,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429362600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:04,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66045912] [2021-08-12 18:58:04,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:04,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 18:58:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:04,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:04,886 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-12 18:58:04,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:04,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:04,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:04,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-08-12 18:58:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:04,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66045912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:04,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:04,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 18:58:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503824654] [2021-08-12 18:58:04,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:58:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:58:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:04,897 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:04,969 INFO L93 Difference]: Finished difference Result 46 states and 80 transitions. [2021-08-12 18:58:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:58:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 12 [2021-08-12 18:58:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:04,970 INFO L225 Difference]: With dead ends: 46 [2021-08-12 18:58:04,971 INFO L226 Difference]: Without dead ends: 29 [2021-08-12 18:58:04,971 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-12 18:58:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-12 18:58:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2021-08-12 18:58:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-08-12 18:58:04,977 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-08-12 18:58:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:04,978 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-08-12 18:58:04,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-08-12 18:58:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:58:04,979 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:04,979 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:05,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:05,192 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-08-12 18:58:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:05,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244959256] [2021-08-12 18:58:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:05,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:05,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244959256] [2021-08-12 18:58:05,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244959256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:05,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932131979] [2021-08-12 18:58:05,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:05,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:05,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 18:58:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:05,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:05,450 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-08-12 18:58:05,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:05,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:05,467 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-12 18:58:05,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:05,489 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 18:58:05,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:05,491 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-08-12 18:58:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:05,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932131979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:05,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:05,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 18:58:05,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474620908] [2021-08-12 18:58:05,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:58:05,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:05,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:58:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:05,525 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:05,639 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-08-12 18:58:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:58:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 12 [2021-08-12 18:58:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:05,641 INFO L225 Difference]: With dead ends: 42 [2021-08-12 18:58:05,641 INFO L226 Difference]: Without dead ends: 35 [2021-08-12 18:58:05,641 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-12 18:58:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-08-12 18:58:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2021-08-12 18:58:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-08-12 18:58:05,644 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-08-12 18:58:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:05,644 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-08-12 18:58:05,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-08-12 18:58:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:58:05,645 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:05,645 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:05,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 18:58:05,868 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-08-12 18:58:05,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:05,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476101843] [2021-08-12 18:58:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:05,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476101843] [2021-08-12 18:58:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476101843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593395953] [2021-08-12 18:58:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:06,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:58:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 18:58:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:06,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:06,135 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-08-12 18:58:06,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:06,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:06,158 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-12 18:58:06,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:06,179 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 18:58:06,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:06,180 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-08-12 18:58:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:06,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593395953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:06,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:06,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 18:58:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138703820] [2021-08-12 18:58:06,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:58:06,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:58:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:06,231 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:06,412 INFO L93 Difference]: Finished difference Result 63 states and 113 transitions. [2021-08-12 18:58:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 12 [2021-08-12 18:58:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:06,414 INFO L225 Difference]: With dead ends: 63 [2021-08-12 18:58:06,414 INFO L226 Difference]: Without dead ends: 51 [2021-08-12 18:58:06,414 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:58:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-12 18:58:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-08-12 18:58:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2021-08-12 18:58:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-08-12 18:58:06,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-08-12 18:58:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:06,418 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-08-12 18:58:06,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-08-12 18:58:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:58:06,418 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:06,418 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:06,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:06,641 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-08-12 18:58:06,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:06,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616531387] [2021-08-12 18:58:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:06,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:06,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616531387] [2021-08-12 18:58:06,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616531387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:06,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661877007] [2021-08-12 18:58:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 18:58:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:06,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661877007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:06,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:06,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 18:58:06,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362945352] [2021-08-12 18:58:06,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:58:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:58:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:58:06,719 INFO L87 Difference]: Start difference. First operand 29 states and 54 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) [2021-08-12 18:58:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:06,756 INFO L93 Difference]: Finished difference Result 68 states and 117 transitions. [2021-08-12 18:58:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:58:06,756 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 12 [2021-08-12 18:58:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:06,757 INFO L225 Difference]: With dead ends: 68 [2021-08-12 18:58:06,757 INFO L226 Difference]: Without dead ends: 59 [2021-08-12 18:58:06,757 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:58:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-12 18:58:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-08-12 18:58:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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) [2021-08-12 18:58:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-08-12 18:58:06,760 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-08-12 18:58:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:06,760 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-08-12 18:58:06,760 INFO L483 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) [2021-08-12 18:58:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-08-12 18:58:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:58:06,761 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:06,761 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:06,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:06,977 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-08-12 18:58:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:06,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156509660] [2021-08-12 18:58:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:06,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:06,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156509660] [2021-08-12 18:58:06,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156509660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:06,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432188980] [2021-08-12 18:58:06,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:07,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 18:58:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:07,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432188980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:07,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:07,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 18:58:07,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259077420] [2021-08-12 18:58:07,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:58:07,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:58:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:58:07,064 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-08-12 18:58:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:07,104 INFO L93 Difference]: Finished difference Result 52 states and 99 transitions. [2021-08-12 18:58:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:58:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12 [2021-08-12 18:58:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:07,105 INFO L225 Difference]: With dead ends: 52 [2021-08-12 18:58:07,105 INFO L226 Difference]: Without dead ends: 43 [2021-08-12 18:58:07,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-12 18:58:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-08-12 18:58:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-08-12 18:58:07,123 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-08-12 18:58:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:07,123 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-08-12 18:58:07,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-08-12 18:58:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-08-12 18:58:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:58:07,124 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:07,124 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:07,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 18:58:07,324 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-08-12 18:58:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:07,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644615450] [2021-08-12 18:58:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:07,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:07,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644615450] [2021-08-12 18:58:07,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644615450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:07,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100519543] [2021-08-12 18:58:07,397 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 [2021-08-12 18:58:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:07,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 18:58:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:07,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:07,617 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 18:58:07,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:07,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:07,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:07,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-08-12 18:58:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:07,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100519543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:07,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:07,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 18:58:07,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757712851] [2021-08-12 18:58:07,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:58:07,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:58:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:07,637 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 18:58:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:07,705 INFO L93 Difference]: Finished difference Result 46 states and 89 transitions. [2021-08-12 18:58:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:58:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 13 [2021-08-12 18:58:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:07,706 INFO L225 Difference]: With dead ends: 46 [2021-08-12 18:58:07,706 INFO L226 Difference]: Without dead ends: 39 [2021-08-12 18:58:07,706 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-12 18:58:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-08-12 18:58:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-08-12 18:58:07,709 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-08-12 18:58:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:07,709 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-08-12 18:58:07,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 18:58:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-08-12 18:58:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:58:07,710 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:07,710 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:07,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:07,924 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-08-12 18:58:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:07,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56967640] [2021-08-12 18:58:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:08,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56967640] [2021-08-12 18:58:08,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56967640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864194621] [2021-08-12 18:58:08,002 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 [2021-08-12 18:58:08,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:08,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:08,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 18:58:08,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:08,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:08,157 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 18:58:08,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:08,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:08,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:08,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-08-12 18:58:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:08,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864194621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:08,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:08,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 18:58:08,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536493680] [2021-08-12 18:58:08,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:58:08,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:08,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:58:08,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:08,179 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:08,279 INFO L93 Difference]: Finished difference Result 57 states and 102 transitions. [2021-08-12 18:58:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 18:58:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:08,281 INFO L225 Difference]: With dead ends: 57 [2021-08-12 18:58:08,281 INFO L226 Difference]: Without dead ends: 50 [2021-08-12 18:58:08,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:58:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-12 18:58:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-08-12 18:58:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-08-12 18:58:08,284 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-08-12 18:58:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:08,284 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-08-12 18:58:08,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-08-12 18:58:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:58:08,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:08,285 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:08,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:08,509 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-08-12 18:58:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:08,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543762490] [2021-08-12 18:58:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:08,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543762490] [2021-08-12 18:58:08,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543762490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14680458] [2021-08-12 18:58:08,545 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 [2021-08-12 18:58:08,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:58:08,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 18:58:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:08,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14680458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:08,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:08,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 18:58:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862123485] [2021-08-12 18:58:08,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:58:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:58:08,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:58:08,610 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-08-12 18:58:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:08,660 INFO L93 Difference]: Finished difference Result 94 states and 168 transitions. [2021-08-12 18:58:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:58:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 13 [2021-08-12 18:58:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:08,661 INFO L225 Difference]: With dead ends: 94 [2021-08-12 18:58:08,661 INFO L226 Difference]: Without dead ends: 85 [2021-08-12 18:58:08,661 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-12 18:58:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-08-12 18:58:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 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) [2021-08-12 18:58:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-08-12 18:58:08,665 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-08-12 18:58:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:08,665 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-08-12 18:58:08,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-08-12 18:58:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-08-12 18:58:08,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:58:08,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:08,665 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:08,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 18:58:08,879 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-08-12 18:58:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:08,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910559989] [2021-08-12 18:58:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:08,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:08,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910559989] [2021-08-12 18:58:08,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910559989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:08,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121604581] [2021-08-12 18:58:08,902 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 [2021-08-12 18:58:08,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:08,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 18:58:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121604581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:08,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:08,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 18:58:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558682461] [2021-08-12 18:58:08,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:58:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:58:08,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:58:08,967 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-08-12 18:58:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:09,039 INFO L93 Difference]: Finished difference Result 74 states and 138 transitions. [2021-08-12 18:58:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:58:09,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 13 [2021-08-12 18:58:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:09,040 INFO L225 Difference]: With dead ends: 74 [2021-08-12 18:58:09,040 INFO L226 Difference]: Without dead ends: 65 [2021-08-12 18:58:09,041 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-12 18:58:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-08-12 18:58:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 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) [2021-08-12 18:58:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-08-12 18:58:09,043 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-08-12 18:58:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:09,043 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-08-12 18:58:09,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-08-12 18:58:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-08-12 18:58:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:58:09,043 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:09,043 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:09,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:09,244 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-08-12 18:58:09,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:09,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003099974] [2021-08-12 18:58:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:09,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:09,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003099974] [2021-08-12 18:58:09,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003099974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:09,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124370037] [2021-08-12 18:58:09,285 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 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 [2021-08-12 18:58:09,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:58:09,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 18:58:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:09,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:09,455 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 18:58:09,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:09,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:09,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:09,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-08-12 18:58:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124370037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:09,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:09,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 18:58:09,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226567871] [2021-08-12 18:58:09,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:58:09,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:58:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:09,472 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:09,618 INFO L93 Difference]: Finished difference Result 80 states and 136 transitions. [2021-08-12 18:58:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:09,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 18:58:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:09,619 INFO L225 Difference]: With dead ends: 80 [2021-08-12 18:58:09,619 INFO L226 Difference]: Without dead ends: 73 [2021-08-12 18:58:09,620 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:58:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-12 18:58:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-08-12 18:58:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-08-12 18:58:09,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-08-12 18:58:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:09,623 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-08-12 18:58:09,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-08-12 18:58:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:58:09,624 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:09,624 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:09,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 18:58:09,845 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-08-12 18:58:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:09,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799337991] [2021-08-12 18:58:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:09,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799337991] [2021-08-12 18:58:09,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799337991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276487878] [2021-08-12 18:58:09,870 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:09,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:58:09,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 18:58:09,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:09,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276487878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:09,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:09,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 18:58:09,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973244603] [2021-08-12 18:58:09,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:58:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:58:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:58:09,932 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:09,992 INFO L93 Difference]: Finished difference Result 74 states and 147 transitions. [2021-08-12 18:58:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 18:58:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:09,993 INFO L225 Difference]: With dead ends: 74 [2021-08-12 18:58:09,993 INFO L226 Difference]: Without dead ends: 65 [2021-08-12 18:58:09,994 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-12 18:58:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-08-12 18:58:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-08-12 18:58:09,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-08-12 18:58:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:09,998 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-08-12 18:58:09,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-08-12 18:58:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:09,998 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:09,998 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:10,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:10,222 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-08-12 18:58:10,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:10,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521268934] [2021-08-12 18:58:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:10,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521268934] [2021-08-12 18:58:10,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521268934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109142422] [2021-08-12 18:58:10,256 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:10,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:10,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:10,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109142422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:10,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:10,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:10,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541728281] [2021-08-12 18:58:10,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:10,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:10,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:10,322 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:10,370 INFO L93 Difference]: Finished difference Result 93 states and 163 transitions. [2021-08-12 18:58:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:58:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:10,371 INFO L225 Difference]: With dead ends: 93 [2021-08-12 18:58:10,371 INFO L226 Difference]: Without dead ends: 84 [2021-08-12 18:58:10,372 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-12 18:58:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-08-12 18:58:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-08-12 18:58:10,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-08-12 18:58:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:10,376 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-08-12 18:58:10,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-08-12 18:58:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:10,376 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:10,376 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:10,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:10,593 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-08-12 18:58:10,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:10,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684633235] [2021-08-12 18:58:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:10,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684633235] [2021-08-12 18:58:10,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684633235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418460869] [2021-08-12 18:58:10,622 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 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 [2021-08-12 18:58:10,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:10,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:10,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418460869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:10,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:10,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:10,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48756436] [2021-08-12 18:58:10,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:10,675 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:10,772 INFO L93 Difference]: Finished difference Result 115 states and 211 transitions. [2021-08-12 18:58:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:58:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:10,774 INFO L225 Difference]: With dead ends: 115 [2021-08-12 18:58:10,774 INFO L226 Difference]: Without dead ends: 103 [2021-08-12 18:58:10,775 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-12 18:58:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-08-12 18:58:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-08-12 18:58:10,780 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-08-12 18:58:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:10,780 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-08-12 18:58:10,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-08-12 18:58:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:10,780 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:10,780 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:10,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:10,981 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-08-12 18:58:10,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:10,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084941533] [2021-08-12 18:58:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:11,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:11,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084941533] [2021-08-12 18:58:11,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084941533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:11,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866115586] [2021-08-12 18:58:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:11,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:58:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:11,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866115586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:11,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:11,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:11,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702438569] [2021-08-12 18:58:11,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:11,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:11,114 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:11,166 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-08-12 18:58:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:11,167 INFO L225 Difference]: With dead ends: 69 [2021-08-12 18:58:11,167 INFO L226 Difference]: Without dead ends: 58 [2021-08-12 18:58:11,168 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-12 18:58:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-08-12 18:58:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-08-12 18:58:11,174 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-08-12 18:58:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:11,175 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-08-12 18:58:11,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-08-12 18:58:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:11,179 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:11,179 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:11,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-12 18:58:11,401 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-08-12 18:58:11,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:11,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326529423] [2021-08-12 18:58:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:11,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326529423] [2021-08-12 18:58:11,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326529423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732127141] [2021-08-12 18:58:11,427 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 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 [2021-08-12 18:58:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:11,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732127141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:11,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:11,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263482854] [2021-08-12 18:58:11,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:11,497 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:11,547 INFO L93 Difference]: Finished difference Result 103 states and 184 transitions. [2021-08-12 18:58:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:58:11,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:11,548 INFO L225 Difference]: With dead ends: 103 [2021-08-12 18:58:11,549 INFO L226 Difference]: Without dead ends: 94 [2021-08-12 18:58:11,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-12 18:58:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-08-12 18:58:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-08-12 18:58:11,555 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-08-12 18:58:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:11,556 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-08-12 18:58:11,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-08-12 18:58:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:11,557 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:11,557 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 18:58:11,773 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-08-12 18:58:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082736606] [2021-08-12 18:58:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:11,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:11,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082736606] [2021-08-12 18:58:11,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082736606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:11,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901019418] [2021-08-12 18:58:11,801 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:11,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:11,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:11,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901019418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:11,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:11,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:11,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215519111] [2021-08-12 18:58:11,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:11,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:11,852 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:11,925 INFO L93 Difference]: Finished difference Result 68 states and 127 transitions. [2021-08-12 18:58:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:11,927 INFO L225 Difference]: With dead ends: 68 [2021-08-12 18:58:11,927 INFO L226 Difference]: Without dead ends: 55 [2021-08-12 18:58:11,928 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-12 18:58:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-08-12 18:58:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-08-12 18:58:11,931 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-08-12 18:58:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:11,931 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-08-12 18:58:11,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-08-12 18:58:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:11,932 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:11,932 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:12,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 18:58:12,153 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-08-12 18:58:12,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:12,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336347569] [2021-08-12 18:58:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:12,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:12,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336347569] [2021-08-12 18:58:12,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336347569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140561640] [2021-08-12 18:58:12,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:12,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:12,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140561640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:12,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:12,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872983860] [2021-08-12 18:58:12,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:12,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:12,253 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:12,335 INFO L93 Difference]: Finished difference Result 100 states and 181 transitions. [2021-08-12 18:58:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:12,336 INFO L225 Difference]: With dead ends: 100 [2021-08-12 18:58:12,336 INFO L226 Difference]: Without dead ends: 91 [2021-08-12 18:58:12,337 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:58:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-12 18:58:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-08-12 18:58:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-08-12 18:58:12,345 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-08-12 18:58:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:12,345 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-08-12 18:58:12,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-08-12 18:58:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:12,345 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:12,346 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:12,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 18:58:12,561 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-08-12 18:58:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:12,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854435077] [2021-08-12 18:58:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:12,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:12,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854435077] [2021-08-12 18:58:12,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854435077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324749832] [2021-08-12 18:58:12,589 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 [2021-08-12 18:58:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:12,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:12,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324749832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:12,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:12,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991649632] [2021-08-12 18:58:12,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:12,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:12,654 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:12,703 INFO L93 Difference]: Finished difference Result 71 states and 133 transitions. [2021-08-12 18:58:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:12,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:12,704 INFO L225 Difference]: With dead ends: 71 [2021-08-12 18:58:12,704 INFO L226 Difference]: Without dead ends: 56 [2021-08-12 18:58:12,704 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-12 18:58:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-08-12 18:58:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-08-12 18:58:12,708 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-08-12 18:58:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:12,708 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-08-12 18:58:12,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-08-12 18:58:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:12,708 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:12,708 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:12,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 18:58:12,932 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-08-12 18:58:12,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:12,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839590787] [2021-08-12 18:58:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:12,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:12,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839590787] [2021-08-12 18:58:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839590787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:12,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195604329] [2021-08-12 18:58:12,959 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 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 [2021-08-12 18:58:12,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:58:12,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:12,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:13,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195604329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:13,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:13,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:13,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352989198] [2021-08-12 18:58:13,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:13,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:13,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:13,019 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:13,110 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-08-12 18:58:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:13,111 INFO L225 Difference]: With dead ends: 97 [2021-08-12 18:58:13,111 INFO L226 Difference]: Without dead ends: 88 [2021-08-12 18:58:13,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:58:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-12 18:58:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-08-12 18:58:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-08-12 18:58:13,116 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-08-12 18:58:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:13,116 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-08-12 18:58:13,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-08-12 18:58:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:13,116 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:13,116 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:13,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:13,333 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-08-12 18:58:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:13,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161185140] [2021-08-12 18:58:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:13,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:13,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161185140] [2021-08-12 18:58:13,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161185140] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:58:13,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:58:13,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:58:13,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863656207] [2021-08-12 18:58:13,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:58:13,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:58:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:58:13,359 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:13,388 INFO L93 Difference]: Finished difference Result 62 states and 120 transitions. [2021-08-12 18:58:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:58:13,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:13,389 INFO L225 Difference]: With dead ends: 62 [2021-08-12 18:58:13,389 INFO L226 Difference]: Without dead ends: 45 [2021-08-12 18:58:13,389 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:58:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-12 18:58:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-12 18:58:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-08-12 18:58:13,392 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-08-12 18:58:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:13,393 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-08-12 18:58:13,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-08-12 18:58:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 18:58:13,393 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:13,393 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:13,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-12 18:58:13,393 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:13,394 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-08-12 18:58:13,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:13,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412783638] [2021-08-12 18:58:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:13,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412783638] [2021-08-12 18:58:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412783638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464923294] [2021-08-12 18:58:13,420 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 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 [2021-08-12 18:58:13,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:13,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:58:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:13,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464923294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:13,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:13,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-12 18:58:13,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239769035] [2021-08-12 18:58:13,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:58:13,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:13,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:58:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:58:13,488 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:13,573 INFO L93 Difference]: Finished difference Result 100 states and 200 transitions. [2021-08-12 18:58:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:58:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 18:58:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:13,575 INFO L225 Difference]: With dead ends: 100 [2021-08-12 18:58:13,575 INFO L226 Difference]: Without dead ends: 91 [2021-08-12 18:58:13,575 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:58:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-12 18:58:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-08-12 18:58:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-08-12 18:58:13,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-08-12 18:58:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:13,580 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-08-12 18:58:13,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-08-12 18:58:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:13,580 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:13,580 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:13,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:13,801 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-08-12 18:58:13,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:13,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178746451] [2021-08-12 18:58:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:13,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:13,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178746451] [2021-08-12 18:58:13,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178746451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:13,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85720152] [2021-08-12 18:58:13,875 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 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 [2021-08-12 18:58:13,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:58:13,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 18:58:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:14,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:14,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:14,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:14,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:14,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-08-12 18:58:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:14,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85720152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:14,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:14,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:14,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564601505] [2021-08-12 18:58:14,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:14,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:14,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:14,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:14,107 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:14,279 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2021-08-12 18:58:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:58:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:14,280 INFO L225 Difference]: With dead ends: 75 [2021-08-12 18:58:14,280 INFO L226 Difference]: Without dead ends: 56 [2021-08-12 18:58:14,280 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-12 18:58:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-08-12 18:58:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-08-12 18:58:14,285 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-08-12 18:58:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:14,285 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-08-12 18:58:14,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-08-12 18:58:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:14,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:14,285 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:14,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:14,501 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-08-12 18:58:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957869562] [2021-08-12 18:58:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:14,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:14,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957869562] [2021-08-12 18:58:14,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957869562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:14,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433579929] [2021-08-12 18:58:14,580 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 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 [2021-08-12 18:58:14,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:14,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:14,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:15,060 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 44 [2021-08-12 18:58:15,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:15,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:15,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:15,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:15,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-08-12 18:58:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:15,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433579929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:15,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:15,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:15,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490913809] [2021-08-12 18:58:15,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:15,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:15,130 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:15,367 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-08-12 18:58:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:15,368 INFO L225 Difference]: With dead ends: 92 [2021-08-12 18:58:15,368 INFO L226 Difference]: Without dead ends: 69 [2021-08-12 18:58:15,369 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:58:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-12 18:58:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-08-12 18:58:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-08-12 18:58:15,374 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-08-12 18:58:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:15,374 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-08-12 18:58:15,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-08-12 18:58:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:15,374 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:15,374 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:15,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-12 18:58:15,598 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-08-12 18:58:15,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:15,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281350231] [2021-08-12 18:58:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:15,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281350231] [2021-08-12 18:58:15,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281350231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856729113] [2021-08-12 18:58:15,662 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 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 [2021-08-12 18:58:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:15,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:15,864 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:15,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:15,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:15,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:15,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:15,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:15,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:15,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:15,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:15,997 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:15,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:15,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:16,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856729113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:16,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:16,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:16,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949913481] [2021-08-12 18:58:16,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:16,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:16,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:16,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:16,022 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:16,208 INFO L93 Difference]: Finished difference Result 104 states and 226 transitions. [2021-08-12 18:58:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:58:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:16,210 INFO L225 Difference]: With dead ends: 104 [2021-08-12 18:58:16,210 INFO L226 Difference]: Without dead ends: 92 [2021-08-12 18:58:16,210 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-12 18:58:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-08-12 18:58:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-08-12 18:58:16,215 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-08-12 18:58:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:16,215 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-08-12 18:58:16,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-08-12 18:58:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:16,215 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:16,216 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:16,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:16,429 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-08-12 18:58:16,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:16,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540561509] [2021-08-12 18:58:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:16,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:16,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540561509] [2021-08-12 18:58:16,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540561509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:16,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852848599] [2021-08-12 18:58:16,497 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 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 [2021-08-12 18:58:16,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:16,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:16,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:16,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:16,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:16,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:16,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:16,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-08-12 18:58:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852848599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:16,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:16,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:16,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625139214] [2021-08-12 18:58:16,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:16,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:16,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:16,736 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:16,915 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-08-12 18:58:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:16,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:16,916 INFO L225 Difference]: With dead ends: 102 [2021-08-12 18:58:16,916 INFO L226 Difference]: Without dead ends: 79 [2021-08-12 18:58:16,916 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:58:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-12 18:58:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-08-12 18:58:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-08-12 18:58:16,921 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-08-12 18:58:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:16,921 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-08-12 18:58:16,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-08-12 18:58:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:16,922 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:16,922 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:17,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-12 18:58:17,129 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-08-12 18:58:17,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:17,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561117045] [2021-08-12 18:58:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:17,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:17,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561117045] [2021-08-12 18:58:17,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561117045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:17,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594935335] [2021-08-12 18:58:17,202 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 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 [2021-08-12 18:58:17,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:58:17,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:17,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:17,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:17,401 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:17,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:17,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:17,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:17,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:17,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:17,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:17,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:17,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:17,522 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:17,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:17,523 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:17,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594935335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:17,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:17,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:17,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281180667] [2021-08-12 18:58:17,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:17,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:17,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:17,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:17,549 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:17,824 INFO L93 Difference]: Finished difference Result 121 states and 265 transitions. [2021-08-12 18:58:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:58:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:17,826 INFO L225 Difference]: With dead ends: 121 [2021-08-12 18:58:17,826 INFO L226 Difference]: Without dead ends: 102 [2021-08-12 18:58:17,826 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-12 18:58:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-12 18:58:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-08-12 18:58:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-08-12 18:58:17,832 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-08-12 18:58:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:17,832 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-08-12 18:58:17,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-08-12 18:58:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:17,832 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:17,832 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:18,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:18,047 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-08-12 18:58:18,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:18,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637301225] [2021-08-12 18:58:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:18,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:18,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637301225] [2021-08-12 18:58:18,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637301225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:18,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812963099] [2021-08-12 18:58:18,119 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 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 [2021-08-12 18:58:18,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:18,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:18,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:18,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:18,346 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:18,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:18,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:18,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:18,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:18,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:18,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:18,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:18,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:18,478 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:18,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:18,479 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:18,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812963099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:18,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:18,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725704528] [2021-08-12 18:58:18,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:18,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:18,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:18,506 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:18,752 INFO L93 Difference]: Finished difference Result 100 states and 232 transitions. [2021-08-12 18:58:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:58:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:18,753 INFO L225 Difference]: With dead ends: 100 [2021-08-12 18:58:18,753 INFO L226 Difference]: Without dead ends: 93 [2021-08-12 18:58:18,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:58:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-12 18:58:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-08-12 18:58:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-08-12 18:58:18,759 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-08-12 18:58:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:18,759 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-08-12 18:58:18,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-08-12 18:58:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:18,760 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:18,760 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:18,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-08-12 18:58:18,981 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-08-12 18:58:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:18,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979674230] [2021-08-12 18:58:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:19,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:19,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979674230] [2021-08-12 18:58:19,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979674230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:19,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037655274] [2021-08-12 18:58:19,043 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 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 [2021-08-12 18:58:19,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:58:19,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:19,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:19,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:19,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:19,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:19,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-08-12 18:58:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:19,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037655274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:19,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:19,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:19,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437111412] [2021-08-12 18:58:19,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:19,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:19,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:19,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:19,275 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:19,461 INFO L93 Difference]: Finished difference Result 109 states and 254 transitions. [2021-08-12 18:58:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:19,465 INFO L225 Difference]: With dead ends: 109 [2021-08-12 18:58:19,465 INFO L226 Difference]: Without dead ends: 86 [2021-08-12 18:58:19,465 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:58:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-12 18:58:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-08-12 18:58:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-08-12 18:58:19,471 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-08-12 18:58:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:19,471 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-08-12 18:58:19,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-08-12 18:58:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:19,471 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:19,472 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:19,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:19,685 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-08-12 18:58:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:19,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289098763] [2021-08-12 18:58:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:19,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:19,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289098763] [2021-08-12 18:58:19,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289098763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:19,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574591116] [2021-08-12 18:58:19,743 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 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 [2021-08-12 18:58:19,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:19,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:20,007 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 44 [2021-08-12 18:58:20,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:20,076 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:20,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:20,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:20,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:20,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:20,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:20,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:20,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:20,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:20,206 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:20,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:20,207 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:20,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574591116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:20,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:20,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:20,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161620783] [2021-08-12 18:58:20,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:20,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:20,241 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:20,514 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2021-08-12 18:58:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:58:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:20,515 INFO L225 Difference]: With dead ends: 122 [2021-08-12 18:58:20,515 INFO L226 Difference]: Without dead ends: 110 [2021-08-12 18:58:20,516 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-12 18:58:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-12 18:58:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-08-12 18:58:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-08-12 18:58:20,524 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-08-12 18:58:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:20,524 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-08-12 18:58:20,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-08-12 18:58:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:20,524 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:20,524 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:20,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-12 18:58:20,741 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-08-12 18:58:20,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:20,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187495008] [2021-08-12 18:58:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:20,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187495008] [2021-08-12 18:58:20,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187495008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246951128] [2021-08-12 18:58:20,809 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 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 [2021-08-12 18:58:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:20,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:21,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:21,026 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:21,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:21,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:21,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:21,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:21,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:21,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:21,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:21,127 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:21,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:21,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:21,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246951128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:21,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:21,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:21,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722038666] [2021-08-12 18:58:21,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:21,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:21,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:21,155 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:21,411 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2021-08-12 18:58:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:58:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:21,412 INFO L225 Difference]: With dead ends: 106 [2021-08-12 18:58:21,412 INFO L226 Difference]: Without dead ends: 99 [2021-08-12 18:58:21,412 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:58:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-12 18:58:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-08-12 18:58:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-08-12 18:58:21,418 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-08-12 18:58:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:21,418 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-08-12 18:58:21,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-08-12 18:58:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:21,419 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:21,419 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-12 18:58:21,633 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-08-12 18:58:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:21,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894645634] [2021-08-12 18:58:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:21,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:21,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894645634] [2021-08-12 18:58:21,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894645634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:21,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902521457] [2021-08-12 18:58:21,696 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 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 [2021-08-12 18:58:21,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:21,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:21,940 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:22,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:22,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:22,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:22,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:22,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:22,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:22,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:22,102 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:22,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:22,103 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:22,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902521457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:22,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:22,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:22,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277628012] [2021-08-12 18:58:22,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:22,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:22,131 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:22,425 INFO L93 Difference]: Finished difference Result 123 states and 294 transitions. [2021-08-12 18:58:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:22,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:22,426 INFO L225 Difference]: With dead ends: 123 [2021-08-12 18:58:22,426 INFO L226 Difference]: Without dead ends: 116 [2021-08-12 18:58:22,427 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:58:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-12 18:58:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-08-12 18:58:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-08-12 18:58:22,434 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-08-12 18:58:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:22,434 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-08-12 18:58:22,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-08-12 18:58:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:22,440 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:22,440 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:22,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-08-12 18:58:22,645 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-08-12 18:58:22,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:22,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543355716] [2021-08-12 18:58:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:22,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543355716] [2021-08-12 18:58:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543355716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947990893] [2021-08-12 18:58:22,708 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 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 [2021-08-12 18:58:22,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:58:22,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:22,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:22,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:22,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:22,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:22,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-08-12 18:58:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:22,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947990893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:22,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:22,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:22,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541994845] [2021-08-12 18:58:22,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:22,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:22,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:22,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:22,925 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:23,139 INFO L93 Difference]: Finished difference Result 116 states and 282 transitions. [2021-08-12 18:58:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:23,141 INFO L225 Difference]: With dead ends: 116 [2021-08-12 18:58:23,141 INFO L226 Difference]: Without dead ends: 93 [2021-08-12 18:58:23,141 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:58:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-12 18:58:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-08-12 18:58:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-08-12 18:58:23,148 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-08-12 18:58:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:23,148 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-08-12 18:58:23,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-08-12 18:58:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:23,148 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:23,148 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:23,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-08-12 18:58:23,372 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:23,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-08-12 18:58:23,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:23,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482482185] [2021-08-12 18:58:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:23,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:23,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482482185] [2021-08-12 18:58:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482482185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:23,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797713990] [2021-08-12 18:58:23,443 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 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 [2021-08-12 18:58:23,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:23,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:23,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:23,747 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 2072 DAG size of output: 44 [2021-08-12 18:58:23,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:23,811 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:23,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:23,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:23,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:23,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:23,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:23,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:23,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:23,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:23,938 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:23,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:23,938 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:23,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797713990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:23,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:23,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:23,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984374574] [2021-08-12 18:58:23,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:23,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:23,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:23,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:23,969 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:24,256 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2021-08-12 18:58:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:58:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:24,257 INFO L225 Difference]: With dead ends: 131 [2021-08-12 18:58:24,257 INFO L226 Difference]: Without dead ends: 119 [2021-08-12 18:58:24,258 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:58:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-12 18:58:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-08-12 18:58:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-08-12 18:58:24,264 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-08-12 18:58:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:24,264 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-08-12 18:58:24,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-08-12 18:58:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:24,265 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:24,265 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:24,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:24,485 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-08-12 18:58:24,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:24,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739313050] [2021-08-12 18:58:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:24,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:24,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739313050] [2021-08-12 18:58:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739313050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:24,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820027343] [2021-08-12 18:58:24,555 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:24,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:58:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:25,611 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 45 [2021-08-12 18:58:25,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:25,698 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:25,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:25,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:25,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:25,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:25,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:25,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:25,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:25,806 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:25,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:25,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820027343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:25,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:25,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:25,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174319460] [2021-08-12 18:58:25,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:25,834 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:26,066 INFO L93 Difference]: Finished difference Result 113 states and 282 transitions. [2021-08-12 18:58:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:58:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:26,067 INFO L225 Difference]: With dead ends: 113 [2021-08-12 18:58:26,067 INFO L226 Difference]: Without dead ends: 106 [2021-08-12 18:58:26,068 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:58:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-12 18:58:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-08-12 18:58:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-08-12 18:58:26,074 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-08-12 18:58:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:26,074 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-08-12 18:58:26,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-08-12 18:58:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:26,075 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:26,075 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:26,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-08-12 18:58:26,289 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:26,289 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-08-12 18:58:26,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:26,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115140557] [2021-08-12 18:58:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:26,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:26,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115140557] [2021-08-12 18:58:26,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115140557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:26,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411976120] [2021-08-12 18:58:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 18:58:26,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:26,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:26,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:26,586 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:26,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:26,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:26,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:26,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:26,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:26,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:26,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:26,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:26,689 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:26,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:26,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:26,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411976120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:26,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:26,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:26,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139009090] [2021-08-12 18:58:26,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:26,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:26,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:26,716 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:27,067 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2021-08-12 18:58:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:58:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:27,068 INFO L225 Difference]: With dead ends: 127 [2021-08-12 18:58:27,068 INFO L226 Difference]: Without dead ends: 120 [2021-08-12 18:58:27,069 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:58:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-12 18:58:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-08-12 18:58:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-08-12 18:58:27,076 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-08-12 18:58:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:27,076 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-08-12 18:58:27,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-08-12 18:58:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:27,077 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:27,077 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:27,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-08-12 18:58:27,300 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-08-12 18:58:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381861739] [2021-08-12 18:58:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:27,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381861739] [2021-08-12 18:58:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381861739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151191595] [2021-08-12 18:58:27,362 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 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 [2021-08-12 18:58:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:27,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:27,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:27,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:27,615 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:27,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:27,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:27,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:27,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:27,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:27,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:27,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:27,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:27,734 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:27,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:27,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:27,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151191595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:27,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:27,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271555112] [2021-08-12 18:58:27,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:27,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:27,759 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:28,126 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2021-08-12 18:58:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:58:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:28,128 INFO L225 Difference]: With dead ends: 141 [2021-08-12 18:58:28,128 INFO L226 Difference]: Without dead ends: 134 [2021-08-12 18:58:28,128 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:58:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-12 18:58:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-08-12 18:58:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-08-12 18:58:28,136 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-08-12 18:58:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:28,136 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-08-12 18:58:28,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-08-12 18:58:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:28,137 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:28,137 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:28,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-08-12 18:58:28,353 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-08-12 18:58:28,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:28,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813222335] [2021-08-12 18:58:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:28,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:28,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813222335] [2021-08-12 18:58:28,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813222335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:28,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854171907] [2021-08-12 18:58:28,420 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 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 [2021-08-12 18:58:28,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:28,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:28,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:28,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:28,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:28,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:28,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-08-12 18:58:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:28,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854171907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:28,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:28,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:28,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204048814] [2021-08-12 18:58:28,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:28,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:28,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:28,639 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:28,835 INFO L93 Difference]: Finished difference Result 126 states and 318 transitions. [2021-08-12 18:58:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:28,836 INFO L225 Difference]: With dead ends: 126 [2021-08-12 18:58:28,836 INFO L226 Difference]: Without dead ends: 103 [2021-08-12 18:58:28,836 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:58:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-12 18:58:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-08-12 18:58:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-08-12 18:58:28,845 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-08-12 18:58:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:28,845 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-08-12 18:58:28,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-08-12 18:58:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:28,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:28,846 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:29,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-08-12 18:58:29,069 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-08-12 18:58:29,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:29,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410287551] [2021-08-12 18:58:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:29,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:29,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410287551] [2021-08-12 18:58:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410287551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:29,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243954151] [2021-08-12 18:58:29,145 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 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 [2021-08-12 18:58:29,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:58:29,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:29,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:29,385 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:29,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:29,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:29,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:29,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:29,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:29,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:29,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:29,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:29,545 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:29,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:29,546 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243954151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:29,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:29,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:29,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401798671] [2021-08-12 18:58:29,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:29,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:29,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:29,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:29,572 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:29,883 INFO L93 Difference]: Finished difference Result 143 states and 359 transitions. [2021-08-12 18:58:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 18:58:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:29,885 INFO L225 Difference]: With dead ends: 143 [2021-08-12 18:58:29,885 INFO L226 Difference]: Without dead ends: 131 [2021-08-12 18:58:29,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:58:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-12 18:58:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-08-12 18:58:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-08-12 18:58:29,894 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-08-12 18:58:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:29,894 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-08-12 18:58:29,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-08-12 18:58:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:29,894 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:29,894 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:30,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:30,109 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-08-12 18:58:30,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:30,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458516679] [2021-08-12 18:58:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:30,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:30,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458516679] [2021-08-12 18:58:30,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458516679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:30,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952345923] [2021-08-12 18:58:30,180 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 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 [2021-08-12 18:58:30,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:30,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:30,380 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:30,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:30,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:30,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:30,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:30,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:30,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:30,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:30,485 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:30,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:30,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952345923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:30,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:30,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:30,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523770453] [2021-08-12 18:58:30,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:30,513 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:30,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:30,762 INFO L93 Difference]: Finished difference Result 130 states and 332 transitions. [2021-08-12 18:58:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:58:30,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:30,764 INFO L225 Difference]: With dead ends: 130 [2021-08-12 18:58:30,764 INFO L226 Difference]: Without dead ends: 123 [2021-08-12 18:58:30,764 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:58:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-12 18:58:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-08-12 18:58:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-08-12 18:58:30,772 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-08-12 18:58:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:30,772 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-08-12 18:58:30,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-08-12 18:58:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:30,773 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:30,773 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:30,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:30,973 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-08-12 18:58:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:30,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181940768] [2021-08-12 18:58:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:31,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:31,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181940768] [2021-08-12 18:58:31,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181940768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:31,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110209178] [2021-08-12 18:58:31,036 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 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 [2021-08-12 18:58:31,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:58:31,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:31,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:31,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:31,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:31,240 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:31,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:31,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:31,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:31,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:31,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:31,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:31,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:31,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:31,362 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:31,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:31,363 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110209178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:31,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:31,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:31,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618959475] [2021-08-12 18:58:31,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:31,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:31,400 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:31,675 INFO L93 Difference]: Finished difference Result 144 states and 362 transitions. [2021-08-12 18:58:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:58:31,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:31,677 INFO L225 Difference]: With dead ends: 144 [2021-08-12 18:58:31,677 INFO L226 Difference]: Without dead ends: 137 [2021-08-12 18:58:31,677 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:58:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-12 18:58:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-08-12 18:58:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-08-12 18:58:31,685 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-08-12 18:58:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:31,685 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-08-12 18:58:31,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-08-12 18:58:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:31,686 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:31,686 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:31,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:31,901 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-08-12 18:58:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:31,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806127365] [2021-08-12 18:58:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:32,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:32,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806127365] [2021-08-12 18:58:32,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806127365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:32,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455633748] [2021-08-12 18:58:32,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:32,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:32,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:32,258 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:32,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:32,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:32,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:32,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:32,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:32,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:32,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:32,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:32,373 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:32,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:32,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455633748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:32,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:32,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:32,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140298672] [2021-08-12 18:58:32,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:32,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:32,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:32,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:32,404 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:32,817 INFO L93 Difference]: Finished difference Result 156 states and 389 transitions. [2021-08-12 18:58:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:58:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:32,818 INFO L225 Difference]: With dead ends: 156 [2021-08-12 18:58:32,818 INFO L226 Difference]: Without dead ends: 149 [2021-08-12 18:58:32,819 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:58:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-12 18:58:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-08-12 18:58:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-08-12 18:58:32,827 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-08-12 18:58:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:32,827 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-08-12 18:58:32,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-08-12 18:58:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:58:32,828 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:32,828 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:33,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:33,028 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-08-12 18:58:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474075988] [2021-08-12 18:58:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:33,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:33,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474075988] [2021-08-12 18:58:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474075988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:33,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689941822] [2021-08-12 18:58:33,092 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 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 [2021-08-12 18:58:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:33,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:58:33,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:33,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:33,353 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-08-12 18:58:33,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:33,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:33,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:33,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 18:58:33,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:33,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:33,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-08-12 18:58:33,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:33,456 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 18:58:33,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:33,457 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-08-12 18:58:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:33,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689941822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:33,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:33,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 18:58:33,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379790152] [2021-08-12 18:58:33,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:58:33,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:58:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:58:33,486 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:33,939 INFO L93 Difference]: Finished difference Result 161 states and 402 transitions. [2021-08-12 18:58:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:58:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:58:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:33,941 INFO L225 Difference]: With dead ends: 161 [2021-08-12 18:58:33,941 INFO L226 Difference]: Without dead ends: 154 [2021-08-12 18:58:33,941 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:58:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-12 18:58:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-08-12 18:58:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-08-12 18:58:33,951 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-08-12 18:58:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:33,951 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-08-12 18:58:33,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-08-12 18:58:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:33,951 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:33,952 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:34,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-08-12 18:58:34,161 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-08-12 18:58:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:34,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648637810] [2021-08-12 18:58:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:34,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:34,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648637810] [2021-08-12 18:58:34,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648637810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:34,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514727429] [2021-08-12 18:58:34,253 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 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 [2021-08-12 18:58:34,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:34,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:34,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:34,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:34,442 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:34,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:34,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:34,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:34,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-08-12 18:58:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:34,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514727429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:34,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:34,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:34,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378781284] [2021-08-12 18:58:34,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:34,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:34,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:34,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:34,496 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:34,705 INFO L93 Difference]: Finished difference Result 134 states and 339 transitions. [2021-08-12 18:58:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:58:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:34,706 INFO L225 Difference]: With dead ends: 134 [2021-08-12 18:58:34,706 INFO L226 Difference]: Without dead ends: 109 [2021-08-12 18:58:34,707 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:58:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-12 18:58:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-08-12 18:58:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-08-12 18:58:34,716 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-08-12 18:58:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:34,717 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-08-12 18:58:34,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-08-12 18:58:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:34,717 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:34,717 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:34,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:34,929 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-08-12 18:58:34,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:34,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332314163] [2021-08-12 18:58:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:35,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332314163] [2021-08-12 18:58:35,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332314163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846541564] [2021-08-12 18:58:35,019 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:35,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:58:35,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:35,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:35,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:35,212 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:35,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:35,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:35,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:35,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-08-12 18:58:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:35,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846541564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:35,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:35,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877971996] [2021-08-12 18:58:35,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:35,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:35,288 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:35,591 INFO L93 Difference]: Finished difference Result 127 states and 324 transitions. [2021-08-12 18:58:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:58:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:35,593 INFO L225 Difference]: With dead ends: 127 [2021-08-12 18:58:35,593 INFO L226 Difference]: Without dead ends: 109 [2021-08-12 18:58:35,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:58:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-12 18:58:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-08-12 18:58:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-08-12 18:58:35,603 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-08-12 18:58:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:35,603 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-08-12 18:58:35,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-08-12 18:58:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:35,604 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:35,604 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-08-12 18:58:35,821 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-08-12 18:58:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086792145] [2021-08-12 18:58:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:35,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086792145] [2021-08-12 18:58:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086792145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117263783] [2021-08-12 18:58:35,915 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:35,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:35,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:36,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:36,093 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:36,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:36,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:36,205 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:36,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:36,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:36,367 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:36,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:36,826 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:36,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:36,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:36,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117263783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:36,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:36,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:36,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209075649] [2021-08-12 18:58:36,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:36,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:36,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:36,862 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:37,128 INFO L93 Difference]: Finished difference Result 142 states and 349 transitions. [2021-08-12 18:58:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 18:58:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:37,129 INFO L225 Difference]: With dead ends: 142 [2021-08-12 18:58:37,129 INFO L226 Difference]: Without dead ends: 130 [2021-08-12 18:58:37,129 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-12 18:58:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-12 18:58:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-08-12 18:58:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-08-12 18:58:37,139 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-08-12 18:58:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:37,139 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-08-12 18:58:37,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-08-12 18:58:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:37,140 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:37,140 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:37,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:37,340 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:37,341 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-08-12 18:58:37,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:37,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877543770] [2021-08-12 18:58:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:37,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877543770] [2021-08-12 18:58:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877543770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377598392] [2021-08-12 18:58:37,423 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 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 [2021-08-12 18:58:37,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:58:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:37,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:37,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:37,637 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:37,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:37,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:37,768 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:37,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:37,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:37,976 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:38,605 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 234 [2021-08-12 18:58:39,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:39,383 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:39,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:39,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377598392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:39,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:39,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-12 18:58:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007090419] [2021-08-12 18:58:39,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 18:58:39,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:39,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 18:58:39,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:58:39,412 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:39,793 INFO L93 Difference]: Finished difference Result 158 states and 376 transitions. [2021-08-12 18:58:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 18:58:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 16 [2021-08-12 18:58:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:39,794 INFO L225 Difference]: With dead ends: 158 [2021-08-12 18:58:39,795 INFO L226 Difference]: Without dead ends: 146 [2021-08-12 18:58:39,795 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:58:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-12 18:58:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-08-12 18:58:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-08-12 18:58:39,802 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-08-12 18:58:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:39,803 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-08-12 18:58:39,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-08-12 18:58:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:39,803 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:39,803 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-08-12 18:58:40,017 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-08-12 18:58:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657168311] [2021-08-12 18:58:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:40,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:40,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657168311] [2021-08-12 18:58:40,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657168311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:40,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791858607] [2021-08-12 18:58:40,052 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 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 [2021-08-12 18:58:40,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:58:40,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:58:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:40,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791858607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:40,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:40,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:58:40,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104003648] [2021-08-12 18:58:40,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:58:40,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:58:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:58:40,116 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:40,219 INFO L93 Difference]: Finished difference Result 225 states and 486 transitions. [2021-08-12 18:58:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:58:40,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 16 [2021-08-12 18:58:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:40,221 INFO L225 Difference]: With dead ends: 225 [2021-08-12 18:58:40,221 INFO L226 Difference]: Without dead ends: 216 [2021-08-12 18:58:40,221 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-12 18:58:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-08-12 18:58:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 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) [2021-08-12 18:58:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-08-12 18:58:40,236 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-08-12 18:58:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:40,236 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-08-12 18:58:40,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-08-12 18:58:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:40,237 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:40,237 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:40,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-08-12 18:58:40,459 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-08-12 18:58:40,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271707854] [2021-08-12 18:58:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:40,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:40,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271707854] [2021-08-12 18:58:40,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271707854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708724486] [2021-08-12 18:58:40,631 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:40,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:40,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:40,817 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:40,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:40,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:40,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:40,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-08-12 18:58:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708724486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:40,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:40,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:40,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121454472] [2021-08-12 18:58:40,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:40,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:40,925 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:41,262 INFO L93 Difference]: Finished difference Result 135 states and 345 transitions. [2021-08-12 18:58:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:58:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:41,264 INFO L225 Difference]: With dead ends: 135 [2021-08-12 18:58:41,264 INFO L226 Difference]: Without dead ends: 117 [2021-08-12 18:58:41,264 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:58:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-12 18:58:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-08-12 18:58:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-08-12 18:58:41,275 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-08-12 18:58:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:41,275 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-08-12 18:58:41,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-08-12 18:58:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:41,275 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:41,275 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:41,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-08-12 18:58:41,498 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-08-12 18:58:41,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:41,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972663104] [2021-08-12 18:58:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:41,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:41,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972663104] [2021-08-12 18:58:41,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972663104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:41,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990349013] [2021-08-12 18:58:41,649 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 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 [2021-08-12 18:58:41,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:41,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:41,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:41,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:41,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:41,861 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:41,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:42,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:42,005 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:42,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:42,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:42,457 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:42,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:42,915 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:42,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:42,916 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990349013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:42,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:42,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:42,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411251362] [2021-08-12 18:58:42,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:42,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:42,948 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:43,262 INFO L93 Difference]: Finished difference Result 152 states and 376 transitions. [2021-08-12 18:58:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:58:43,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:43,263 INFO L225 Difference]: With dead ends: 152 [2021-08-12 18:58:43,263 INFO L226 Difference]: Without dead ends: 140 [2021-08-12 18:58:43,264 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:58:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-12 18:58:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-08-12 18:58:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-08-12 18:58:43,275 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-08-12 18:58:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:43,275 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-08-12 18:58:43,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-08-12 18:58:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:43,276 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:43,276 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:43,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-08-12 18:58:43,489 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-08-12 18:58:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:43,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84564200] [2021-08-12 18:58:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:43,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:43,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84564200] [2021-08-12 18:58:43,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84564200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:43,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673414106] [2021-08-12 18:58:43,603 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 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 [2021-08-12 18:58:43,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:58:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:43,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:43,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:43,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:43,817 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:43,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:43,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:43,958 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:44,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:44,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:44,254 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:44,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:44,941 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:44,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:44,942 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673414106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:44,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:44,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090428457] [2021-08-12 18:58:44,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:44,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:44,975 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:45,400 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2021-08-12 18:58:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:58:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:45,401 INFO L225 Difference]: With dead ends: 173 [2021-08-12 18:58:45,401 INFO L226 Difference]: Without dead ends: 161 [2021-08-12 18:58:45,402 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:58:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-12 18:58:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-08-12 18:58:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-08-12 18:58:45,413 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-08-12 18:58:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:45,413 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-08-12 18:58:45,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-08-12 18:58:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:45,414 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:45,414 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:45,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-08-12 18:58:45,636 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-08-12 18:58:45,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:45,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849965888] [2021-08-12 18:58:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:45,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:45,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849965888] [2021-08-12 18:58:45,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849965888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:45,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419539776] [2021-08-12 18:58:45,709 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 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 [2021-08-12 18:58:45,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:45,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:45,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:45,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:45,910 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:45,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:46,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:46,011 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:46,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:46,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:46,227 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:46,872 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 279 [2021-08-12 18:58:47,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:47,699 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:47,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:47,700 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419539776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:47,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:47,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286329046] [2021-08-12 18:58:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:47,726 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:48,220 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2021-08-12 18:58:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 18:58:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:48,222 INFO L225 Difference]: With dead ends: 190 [2021-08-12 18:58:48,222 INFO L226 Difference]: Without dead ends: 178 [2021-08-12 18:58:48,222 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:58:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-12 18:58:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-08-12 18:58:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-08-12 18:58:48,235 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-08-12 18:58:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:48,236 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-08-12 18:58:48,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-08-12 18:58:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:48,236 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:48,236 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:48,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-08-12 18:58:48,453 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-08-12 18:58:48,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:48,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594893390] [2021-08-12 18:58:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594893390] [2021-08-12 18:58:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594893390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857950794] [2021-08-12 18:58:48,488 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 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 [2021-08-12 18:58:48,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:58:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:58:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:48,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857950794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:48,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:48,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:58:48,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897573111] [2021-08-12 18:58:48,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:58:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:58:48,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:58:48,563 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:48,771 INFO L93 Difference]: Finished difference Result 271 states and 580 transitions. [2021-08-12 18:58:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:58:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 16 [2021-08-12 18:58:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:48,773 INFO L225 Difference]: With dead ends: 271 [2021-08-12 18:58:48,773 INFO L226 Difference]: Without dead ends: 260 [2021-08-12 18:58:48,773 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:58:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-08-12 18:58:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-08-12 18:58:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-08-12 18:58:48,787 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-08-12 18:58:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:48,787 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-08-12 18:58:48,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-08-12 18:58:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:48,788 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:48,788 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:49,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-08-12 18:58:49,001 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-08-12 18:58:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:49,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633058788] [2021-08-12 18:58:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:49,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:49,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633058788] [2021-08-12 18:58:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633058788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:49,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322383354] [2021-08-12 18:58:49,184 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 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 [2021-08-12 18:58:49,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:58:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:49,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:49,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:49,400 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:49,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:49,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:49,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:58:49,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-08-12 18:58:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:49,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322383354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:49,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:49,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703656153] [2021-08-12 18:58:49,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:49,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:49,436 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:49,757 INFO L93 Difference]: Finished difference Result 145 states and 380 transitions. [2021-08-12 18:58:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:58:49,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:49,758 INFO L225 Difference]: With dead ends: 145 [2021-08-12 18:58:49,758 INFO L226 Difference]: Without dead ends: 127 [2021-08-12 18:58:49,758 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:58:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-12 18:58:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-08-12 18:58:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-08-12 18:58:49,769 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-08-12 18:58:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:49,769 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-08-12 18:58:49,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-08-12 18:58:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:49,769 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:49,769 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:49,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:49,973 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-08-12 18:58:49,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:49,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230132447] [2021-08-12 18:58:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:50,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:50,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230132447] [2021-08-12 18:58:50,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230132447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:50,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283947254] [2021-08-12 18:58:50,119 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 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 [2021-08-12 18:58:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:50,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:50,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:50,295 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:50,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:50,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:50,404 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:50,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:50,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:50,662 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:51,196 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 227 [2021-08-12 18:58:51,966 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 230 [2021-08-12 18:58:52,290 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-08-12 18:58:52,409 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-08-12 18:58:52,547 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 299 [2021-08-12 18:58:52,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:52,940 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:52,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:52,941 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:52,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283947254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:52,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:52,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879306110] [2021-08-12 18:58:52,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:52,966 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:53,283 INFO L93 Difference]: Finished difference Result 165 states and 419 transitions. [2021-08-12 18:58:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:58:53,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:53,285 INFO L225 Difference]: With dead ends: 165 [2021-08-12 18:58:53,285 INFO L226 Difference]: Without dead ends: 153 [2021-08-12 18:58:53,285 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:58:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-12 18:58:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-08-12 18:58:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-08-12 18:58:53,298 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-08-12 18:58:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:53,298 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-08-12 18:58:53,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-08-12 18:58:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:53,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:53,299 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:53,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2005 [2021-08-12 18:58:53,513 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-08-12 18:58:53,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:53,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988195805] [2021-08-12 18:58:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:53,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988195805] [2021-08-12 18:58:53,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988195805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65715705] [2021-08-12 18:58:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 18:58:53,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:53,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:53,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:53,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:53,775 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:53,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:53,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:53,871 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:54,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:54,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:54,154 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:55,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:55,024 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:55,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:55,024 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65715705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:55,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304967363] [2021-08-12 18:58:55,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:55,050 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:55,480 INFO L93 Difference]: Finished difference Result 194 states and 473 transitions. [2021-08-12 18:58:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 18:58:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:55,482 INFO L225 Difference]: With dead ends: 194 [2021-08-12 18:58:55,482 INFO L226 Difference]: Without dead ends: 182 [2021-08-12 18:58:55,482 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:58:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-12 18:58:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-08-12 18:58:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-08-12 18:58:55,497 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-08-12 18:58:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:55,497 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-08-12 18:58:55,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-08-12 18:58:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:55,498 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:55,498 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:55,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:55,721 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-08-12 18:58:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:55,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864574782] [2021-08-12 18:58:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:55,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:55,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864574782] [2021-08-12 18:58:55,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864574782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:55,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837407040] [2021-08-12 18:58:55,795 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 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 [2021-08-12 18:58:55,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:58:55,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:55,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:55,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:55,997 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:56,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:56,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:56,123 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:56,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:56,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:56,355 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:56,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:56,745 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:56,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:56,746 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:56,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837407040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:56,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:56,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:56,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359664584] [2021-08-12 18:58:56,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:56,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:56,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:56,774 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:57,379 INFO L93 Difference]: Finished difference Result 207 states and 496 transitions. [2021-08-12 18:58:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:58:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:57,381 INFO L225 Difference]: With dead ends: 207 [2021-08-12 18:58:57,381 INFO L226 Difference]: Without dead ends: 195 [2021-08-12 18:58:57,381 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 18:58:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-12 18:58:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-08-12 18:58:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-08-12 18:58:57,394 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-08-12 18:58:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:57,394 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-08-12 18:58:57,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-08-12 18:58:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:57,395 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:57,395 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:57,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2691 [2021-08-12 18:58:57,596 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-08-12 18:58:57,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:57,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049133841] [2021-08-12 18:58:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:57,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049133841] [2021-08-12 18:58:57,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049133841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167600303] [2021-08-12 18:58:57,706 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:57,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:57,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:57,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:58:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:57,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:57,943 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:58:57,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:58:58,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:58,041 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:58:58,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:58,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:58:58,253 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:58:59,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:58:59,396 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:58:59,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:58:59,396 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:58:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:59,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167600303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:59,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:59,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:58:59,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299624045] [2021-08-12 18:58:59,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:58:59,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:59,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:58:59,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:58:59,422 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:59,839 INFO L93 Difference]: Finished difference Result 167 states and 410 transitions. [2021-08-12 18:58:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:58:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:58:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:59,840 INFO L225 Difference]: With dead ends: 167 [2021-08-12 18:58:59,840 INFO L226 Difference]: Without dead ends: 155 [2021-08-12 18:58:59,840 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:58:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-12 18:58:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-08-12 18:58:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-08-12 18:58:59,856 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-08-12 18:58:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:59,857 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-08-12 18:58:59,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-08-12 18:58:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:58:59,857 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:59,857 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:00,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:00,069 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-08-12 18:59:00,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:00,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494372114] [2021-08-12 18:59:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:00,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:00,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494372114] [2021-08-12 18:59:00,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494372114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:00,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021097540] [2021-08-12 18:59:00,102 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 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 [2021-08-12 18:59:00,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:59:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:00,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021097540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:00,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:00,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69448072] [2021-08-12 18:59:00,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:00,167 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:00,362 INFO L93 Difference]: Finished difference Result 256 states and 575 transitions. [2021-08-12 18:59:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:59:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 16 [2021-08-12 18:59:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:00,364 INFO L225 Difference]: With dead ends: 256 [2021-08-12 18:59:00,364 INFO L226 Difference]: Without dead ends: 247 [2021-08-12 18:59:00,364 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:59:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-12 18:59:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-08-12 18:59:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 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) [2021-08-12 18:59:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-08-12 18:59:00,382 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-08-12 18:59:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:00,382 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-08-12 18:59:00,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-08-12 18:59:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:00,383 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:00,383 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:00,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:00,593 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-08-12 18:59:00,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:00,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053058383] [2021-08-12 18:59:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:00,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053058383] [2021-08-12 18:59:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053058383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708885261] [2021-08-12 18:59:00,744 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 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 [2021-08-12 18:59:00,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:59:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:00,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:00,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:00,936 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:00,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:00,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:00,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:00,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-08-12 18:59:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:00,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708885261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:00,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:00,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:00,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782732656] [2021-08-12 18:59:00,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:00,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:00,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:00,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:00,967 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:01,258 INFO L93 Difference]: Finished difference Result 159 states and 423 transitions. [2021-08-12 18:59:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:59:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:01,260 INFO L225 Difference]: With dead ends: 159 [2021-08-12 18:59:01,260 INFO L226 Difference]: Without dead ends: 141 [2021-08-12 18:59:01,260 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:59:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-12 18:59:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-08-12 18:59:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-08-12 18:59:01,278 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-08-12 18:59:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:01,278 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-08-12 18:59:01,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-08-12 18:59:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:01,278 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:01,278 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:01,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:01,479 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:01,479 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-08-12 18:59:01,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:01,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068872214] [2021-08-12 18:59:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:01,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:01,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068872214] [2021-08-12 18:59:01,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068872214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:01,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865496861] [2021-08-12 18:59:01,641 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 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 [2021-08-12 18:59:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:01,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:01,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:01,834 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:01,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:01,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:01,938 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:02,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:02,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:02,180 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:03,217 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 228 [2021-08-12 18:59:03,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:03,593 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:03,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:03,594 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:03,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865496861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:03,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:03,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:03,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441018320] [2021-08-12 18:59:03,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:03,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:03,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:03,620 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:03,996 INFO L93 Difference]: Finished difference Result 181 states and 467 transitions. [2021-08-12 18:59:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 18:59:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:03,998 INFO L225 Difference]: With dead ends: 181 [2021-08-12 18:59:03,998 INFO L226 Difference]: Without dead ends: 169 [2021-08-12 18:59:03,998 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:59:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-12 18:59:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-08-12 18:59:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-08-12 18:59:04,016 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-08-12 18:59:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:04,017 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-08-12 18:59:04,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-08-12 18:59:04,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:04,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:04,017 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:04,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-08-12 18:59:04,235 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-08-12 18:59:04,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:04,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441177596] [2021-08-12 18:59:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:04,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:04,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441177596] [2021-08-12 18:59:04,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441177596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:04,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403383589] [2021-08-12 18:59:04,320 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:04,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:04,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:04,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:04,501 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:04,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:04,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:04,589 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:04,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:04,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:04,783 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:05,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:05,505 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:05,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:05,506 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:05,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403383589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:05,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:05,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:05,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519755375] [2021-08-12 18:59:05,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:05,534 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:05,958 INFO L93 Difference]: Finished difference Result 205 states and 507 transitions. [2021-08-12 18:59:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:59:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:05,959 INFO L225 Difference]: With dead ends: 205 [2021-08-12 18:59:05,959 INFO L226 Difference]: Without dead ends: 193 [2021-08-12 18:59:05,960 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-12 18:59:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-12 18:59:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-08-12 18:59:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-08-12 18:59:05,977 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-08-12 18:59:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:05,977 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-08-12 18:59:05,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-08-12 18:59:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:05,977 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:05,977 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:06,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:06,178 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-08-12 18:59:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:06,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642461758] [2021-08-12 18:59:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:06,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:06,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642461758] [2021-08-12 18:59:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642461758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:06,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179810362] [2021-08-12 18:59:06,256 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 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 [2021-08-12 18:59:06,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:59:06,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:06,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:06,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:06,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:06,475 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:06,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:06,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:06,577 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:06,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:06,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:06,709 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:07,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:07,658 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:07,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:07,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:07,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179810362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:07,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:07,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:07,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420727441] [2021-08-12 18:59:07,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:07,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:07,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:07,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:07,684 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:08,299 INFO L93 Difference]: Finished difference Result 228 states and 549 transitions. [2021-08-12 18:59:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:59:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:08,300 INFO L225 Difference]: With dead ends: 228 [2021-08-12 18:59:08,300 INFO L226 Difference]: Without dead ends: 216 [2021-08-12 18:59:08,300 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 18:59:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-12 18:59:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-08-12 18:59:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-08-12 18:59:08,317 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-08-12 18:59:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:08,317 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-08-12 18:59:08,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-08-12 18:59:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:08,317 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:08,317 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:08,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-08-12 18:59:08,518 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-08-12 18:59:08,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:08,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772229296] [2021-08-12 18:59:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:08,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:08,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772229296] [2021-08-12 18:59:08,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772229296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:08,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675063229] [2021-08-12 18:59:08,599 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 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 [2021-08-12 18:59:08,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:08,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:08,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:08,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:08,814 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:08,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:08,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:08,933 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:09,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:09,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:09,174 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:09,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:09,577 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:09,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:09,578 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675063229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:09,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:09,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:09,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194495956] [2021-08-12 18:59:09,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:09,620 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:10,134 INFO L93 Difference]: Finished difference Result 188 states and 459 transitions. [2021-08-12 18:59:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:59:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:10,135 INFO L225 Difference]: With dead ends: 188 [2021-08-12 18:59:10,135 INFO L226 Difference]: Without dead ends: 176 [2021-08-12 18:59:10,136 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 494.5ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-08-12 18:59:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-12 18:59:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-08-12 18:59:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-08-12 18:59:10,154 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-08-12 18:59:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:10,155 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-08-12 18:59:10,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-08-12 18:59:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:10,155 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:10,155 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:10,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-08-12 18:59:10,378 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:10,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-08-12 18:59:10,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:10,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871046048] [2021-08-12 18:59:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:10,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871046048] [2021-08-12 18:59:10,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871046048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805935512] [2021-08-12 18:59:10,463 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:10,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:59:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:10,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:10,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:10,707 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:10,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:10,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:10,857 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:10,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:11,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:11,011 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:11,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:11,595 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:11,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:11,595 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805935512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533385727] [2021-08-12 18:59:11,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:11,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:11,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:11,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:11,621 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:12,198 INFO L93 Difference]: Finished difference Result 188 states and 467 transitions. [2021-08-12 18:59:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 18:59:12,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:12,199 INFO L225 Difference]: With dead ends: 188 [2021-08-12 18:59:12,200 INFO L226 Difference]: Without dead ends: 176 [2021-08-12 18:59:12,200 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 18:59:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-12 18:59:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-08-12 18:59:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-08-12 18:59:12,216 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-08-12 18:59:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:12,216 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-08-12 18:59:12,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-08-12 18:59:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:12,217 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:12,217 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:12,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-08-12 18:59:12,440 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:12,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-08-12 18:59:12,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:12,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041513519] [2021-08-12 18:59:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:12,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:12,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041513519] [2021-08-12 18:59:12,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041513519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:12,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753529052] [2021-08-12 18:59:12,469 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 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 [2021-08-12 18:59:12,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:59:12,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:12,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753529052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:12,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:12,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:12,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272095088] [2021-08-12 18:59:12,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:12,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:12,519 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:12,777 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2021-08-12 18:59:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:59:12,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 16 [2021-08-12 18:59:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:12,778 INFO L225 Difference]: With dead ends: 254 [2021-08-12 18:59:12,778 INFO L226 Difference]: Without dead ends: 245 [2021-08-12 18:59:12,779 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-12 18:59:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-08-12 18:59:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-08-12 18:59:12,796 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-08-12 18:59:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:12,796 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-08-12 18:59:12,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-08-12 18:59:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:12,797 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:12,797 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:13,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:13,020 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-08-12 18:59:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554199503] [2021-08-12 18:59:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:13,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:13,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554199503] [2021-08-12 18:59:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554199503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:13,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93147077] [2021-08-12 18:59:13,177 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 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 [2021-08-12 18:59:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:13,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:13,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:13,355 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:13,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:13,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:13,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:13,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-08-12 18:59:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93147077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:13,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:13,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848837079] [2021-08-12 18:59:13,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:13,406 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:13,681 INFO L93 Difference]: Finished difference Result 173 states and 462 transitions. [2021-08-12 18:59:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:59:13,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:13,682 INFO L225 Difference]: With dead ends: 173 [2021-08-12 18:59:13,682 INFO L226 Difference]: Without dead ends: 155 [2021-08-12 18:59:13,682 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-12 18:59:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-08-12 18:59:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-08-12 18:59:13,704 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-08-12 18:59:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:13,704 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-08-12 18:59:13,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-08-12 18:59:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:13,705 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:13,705 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:13,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:13,928 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-08-12 18:59:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:13,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362886095] [2021-08-12 18:59:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:14,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:14,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362886095] [2021-08-12 18:59:14,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362886095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:14,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551290633] [2021-08-12 18:59:14,066 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 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 [2021-08-12 18:59:14,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:14,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:14,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:14,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:14,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:14,233 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:14,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:14,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:14,338 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:14,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:14,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:14,589 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:15,711 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 313 [2021-08-12 18:59:15,843 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-08-12 18:59:15,974 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-08-12 18:59:16,123 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 329 [2021-08-12 18:59:16,267 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2021-08-12 18:59:16,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:16,617 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:16,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:16,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:16,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551290633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:16,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:16,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:16,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14077213] [2021-08-12 18:59:16,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:16,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:16,643 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:17,070 INFO L93 Difference]: Finished difference Result 201 states and 525 transitions. [2021-08-12 18:59:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:59:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:17,071 INFO L225 Difference]: With dead ends: 201 [2021-08-12 18:59:17,071 INFO L226 Difference]: Without dead ends: 189 [2021-08-12 18:59:17,071 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:59:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-12 18:59:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-08-12 18:59:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-08-12 18:59:17,091 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-08-12 18:59:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:17,091 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-08-12 18:59:17,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-08-12 18:59:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:17,091 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:17,092 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:17,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4334,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:17,313 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-08-12 18:59:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:17,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847291132] [2021-08-12 18:59:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:17,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847291132] [2021-08-12 18:59:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847291132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150045519] [2021-08-12 18:59:17,399 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 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 [2021-08-12 18:59:17,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:59:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:17,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:17,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:17,580 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:17,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:17,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:17,718 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:17,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:17,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:17,917 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:19,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:19,217 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:19,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:19,217 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150045519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:19,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:19,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014810821] [2021-08-12 18:59:19,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:19,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:19,243 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:19,825 INFO L93 Difference]: Finished difference Result 224 states and 563 transitions. [2021-08-12 18:59:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:59:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:19,827 INFO L225 Difference]: With dead ends: 224 [2021-08-12 18:59:19,827 INFO L226 Difference]: Without dead ends: 212 [2021-08-12 18:59:19,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-08-12 18:59:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-12 18:59:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-08-12 18:59:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-08-12 18:59:19,848 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-08-12 18:59:19,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:19,848 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-08-12 18:59:19,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-08-12 18:59:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:19,848 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:19,849 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:20,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-08-12 18:59:20,069 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-08-12 18:59:20,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:20,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558905286] [2021-08-12 18:59:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:20,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558905286] [2021-08-12 18:59:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558905286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967915749] [2021-08-12 18:59:20,101 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 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 [2021-08-12 18:59:20,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:20,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:59:20,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967915749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:20,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:20,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:59:20,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644584540] [2021-08-12 18:59:20,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:59:20,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:20,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:59:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:59:20,145 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:20,325 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2021-08-12 18:59:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:59:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:59:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:20,327 INFO L225 Difference]: With dead ends: 282 [2021-08-12 18:59:20,327 INFO L226 Difference]: Without dead ends: 273 [2021-08-12 18:59:20,327 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-12 18:59:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-08-12 18:59:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-08-12 18:59:20,346 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-08-12 18:59:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:20,346 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-08-12 18:59:20,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-08-12 18:59:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:20,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:20,347 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:20,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-08-12 18:59:20,548 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-08-12 18:59:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:20,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914915249] [2021-08-12 18:59:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:20,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914915249] [2021-08-12 18:59:20,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914915249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191661868] [2021-08-12 18:59:20,631 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 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 [2021-08-12 18:59:20,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:59:20,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:20,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:20,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:20,828 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:20,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:20,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:20,926 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:21,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:21,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:21,276 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:21,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:21,753 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:21,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:21,754 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:21,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191661868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:21,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:21,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:21,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926890366] [2021-08-12 18:59:21,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:21,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:21,779 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:22,397 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2021-08-12 18:59:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 18:59:22,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:22,399 INFO L225 Difference]: With dead ends: 275 [2021-08-12 18:59:22,399 INFO L226 Difference]: Without dead ends: 263 [2021-08-12 18:59:22,399 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 18:59:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-12 18:59:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-08-12 18:59:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-08-12 18:59:22,420 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-08-12 18:59:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:22,420 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-08-12 18:59:22,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-08-12 18:59:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:22,421 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:22,421 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:22,641 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-08-12 18:59:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:22,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676754508] [2021-08-12 18:59:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:22,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676754508] [2021-08-12 18:59:22,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676754508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491542015] [2021-08-12 18:59:22,674 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 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 [2021-08-12 18:59:22,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:59:22,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:22,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:22,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:22,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491542015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:22,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:22,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94991023] [2021-08-12 18:59:22,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:22,728 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:22,985 INFO L93 Difference]: Finished difference Result 311 states and 715 transitions. [2021-08-12 18:59:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:59:22,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:59:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:22,987 INFO L225 Difference]: With dead ends: 311 [2021-08-12 18:59:22,987 INFO L226 Difference]: Without dead ends: 300 [2021-08-12 18:59:22,987 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-12 18:59:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-08-12 18:59:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-08-12 18:59:23,007 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-08-12 18:59:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:23,007 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-08-12 18:59:23,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-08-12 18:59:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:23,008 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:23,008 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:23,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5248,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:23,213 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-08-12 18:59:23,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:23,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692597132] [2021-08-12 18:59:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:23,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692597132] [2021-08-12 18:59:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692597132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864195246] [2021-08-12 18:59:23,300 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 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 [2021-08-12 18:59:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:23,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:23,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:23,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:23,556 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:23,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:23,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:23,673 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:23,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:23,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:23,943 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:25,015 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 272 [2021-08-12 18:59:25,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:25,408 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:25,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:25,409 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:25,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864195246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:25,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:25,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:25,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049326882] [2021-08-12 18:59:25,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:25,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:25,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:25,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:25,445 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:26,057 INFO L93 Difference]: Finished difference Result 244 states and 617 transitions. [2021-08-12 18:59:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:59:26,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:26,059 INFO L225 Difference]: With dead ends: 244 [2021-08-12 18:59:26,059 INFO L226 Difference]: Without dead ends: 232 [2021-08-12 18:59:26,059 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 563.5ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-08-12 18:59:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-12 18:59:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-08-12 18:59:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-08-12 18:59:26,090 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-08-12 18:59:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:26,090 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-08-12 18:59:26,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-08-12 18:59:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:26,091 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:26,091 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:26,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:26,305 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-08-12 18:59:26,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:26,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059349098] [2021-08-12 18:59:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:26,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:26,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059349098] [2021-08-12 18:59:26,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059349098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:26,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288392950] [2021-08-12 18:59:26,360 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 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 [2021-08-12 18:59:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:26,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288392950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:26,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:26,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:26,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368695270] [2021-08-12 18:59:26,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:26,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:26,415 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:26,656 INFO L93 Difference]: Finished difference Result 271 states and 645 transitions. [2021-08-12 18:59:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:59:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:59:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:26,658 INFO L225 Difference]: With dead ends: 271 [2021-08-12 18:59:26,658 INFO L226 Difference]: Without dead ends: 262 [2021-08-12 18:59:26,658 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:59:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-12 18:59:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-08-12 18:59:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-08-12 18:59:26,687 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-08-12 18:59:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:26,688 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-08-12 18:59:26,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-08-12 18:59:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:26,688 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:26,688 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:26,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5581,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:26,911 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-08-12 18:59:26,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:26,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84362899] [2021-08-12 18:59:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:27,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84362899] [2021-08-12 18:59:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84362899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549988537] [2021-08-12 18:59:27,005 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 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 [2021-08-12 18:59:27,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:59:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:27,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:27,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:27,324 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:27,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:27,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:27,476 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:28,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:28,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:28,367 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:28,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:28,530 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:28,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:28,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:28,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549988537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:28,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:28,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:28,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177381922] [2021-08-12 18:59:28,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:28,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:28,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:28,556 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:29,228 INFO L93 Difference]: Finished difference Result 235 states and 593 transitions. [2021-08-12 18:59:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 18:59:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:29,230 INFO L225 Difference]: With dead ends: 235 [2021-08-12 18:59:29,230 INFO L226 Difference]: Without dead ends: 223 [2021-08-12 18:59:29,231 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:59:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-12 18:59:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-08-12 18:59:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-08-12 18:59:29,260 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-08-12 18:59:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:29,260 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-08-12 18:59:29,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-08-12 18:59:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:29,260 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:29,261 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:29,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:29,461 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-08-12 18:59:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:29,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069175289] [2021-08-12 18:59:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:29,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:29,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069175289] [2021-08-12 18:59:29,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069175289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:29,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523248896] [2021-08-12 18:59:29,491 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 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 [2021-08-12 18:59:29,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:29,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:29,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523248896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:29,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:29,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:29,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197319354] [2021-08-12 18:59:29,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:29,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:29,541 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:29,859 INFO L93 Difference]: Finished difference Result 266 states and 637 transitions. [2021-08-12 18:59:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:59:29,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:59:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:29,861 INFO L225 Difference]: With dead ends: 266 [2021-08-12 18:59:29,861 INFO L226 Difference]: Without dead ends: 257 [2021-08-12 18:59:29,861 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-12 18:59:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-08-12 18:59:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-08-12 18:59:29,893 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-08-12 18:59:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:29,894 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-08-12 18:59:29,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-08-12 18:59:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:29,894 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:29,894 INFO L550 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:30,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-08-12 18:59:30,102 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:30,102 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-08-12 18:59:30,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:30,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094542090] [2021-08-12 18:59:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:30,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094542090] [2021-08-12 18:59:30,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094542090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630258728] [2021-08-12 18:59:30,174 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 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 [2021-08-12 18:59:30,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:59:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:30,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:59:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:30,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:30,441 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-12 18:59:30,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:30,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:30,558 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-08-12 18:59:31,994 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 357 [2021-08-12 18:59:32,136 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 357 [2021-08-12 18:59:32,302 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 361 [2021-08-12 18:59:32,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:32,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:32,627 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-08-12 18:59:32,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:33,008 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-08-12 18:59:33,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:33,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-08-12 18:59:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:33,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630258728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:33,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:33,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 18:59:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084921011] [2021-08-12 18:59:33,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 18:59:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 18:59:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:33,034 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:33,735 INFO L93 Difference]: Finished difference Result 222 states and 569 transitions. [2021-08-12 18:59:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 18:59:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-08-12 18:59:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:33,736 INFO L225 Difference]: With dead ends: 222 [2021-08-12 18:59:33,737 INFO L226 Difference]: Without dead ends: 210 [2021-08-12 18:59:33,737 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:59:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-08-12 18:59:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-08-12 18:59:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-08-12 18:59:33,772 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-08-12 18:59:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:33,772 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-08-12 18:59:33,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-08-12 18:59:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:59:33,772 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:33,772 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:33,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-08-12 18:59:33,977 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-08-12 18:59:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:33,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356080447] [2021-08-12 18:59:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:34,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:34,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356080447] [2021-08-12 18:59:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356080447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889420096] [2021-08-12 18:59:34,012 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 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 [2021-08-12 18:59:34,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:59:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:59:34,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889420096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:34,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:34,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576487079] [2021-08-12 18:59:34,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:34,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:34,084 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:34,476 INFO L93 Difference]: Finished difference Result 292 states and 718 transitions. [2021-08-12 18:59:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:59:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-08-12 18:59:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:34,477 INFO L225 Difference]: With dead ends: 292 [2021-08-12 18:59:34,477 INFO L226 Difference]: Without dead ends: 283 [2021-08-12 18:59:34,477 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:59:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-12 18:59:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-08-12 18:59:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-08-12 18:59:34,505 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-08-12 18:59:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:34,505 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-08-12 18:59:34,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-08-12 18:59:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:34,506 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:34,506 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:34,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6284,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:34,711 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-08-12 18:59:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:34,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045276418] [2021-08-12 18:59:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:34,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:34,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045276418] [2021-08-12 18:59:34,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045276418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:34,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289190389] [2021-08-12 18:59:34,806 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 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 [2021-08-12 18:59:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:34,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:35,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:35,059 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:35,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:35,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:35,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:35,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-08-12 18:59:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:35,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289190389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:35,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:35,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:35,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835726933] [2021-08-12 18:59:35,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:35,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:35,344 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:35,704 INFO L93 Difference]: Finished difference Result 223 states and 607 transitions. [2021-08-12 18:59:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 18:59:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:35,705 INFO L225 Difference]: With dead ends: 223 [2021-08-12 18:59:35,705 INFO L226 Difference]: Without dead ends: 198 [2021-08-12 18:59:35,706 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:59:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-12 18:59:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-08-12 18:59:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-08-12 18:59:35,738 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-08-12 18:59:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:35,738 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-08-12 18:59:35,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-08-12 18:59:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:35,739 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:35,739 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:35,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6285 [2021-08-12 18:59:35,940 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-08-12 18:59:35,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:35,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774388999] [2021-08-12 18:59:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:36,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:36,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774388999] [2021-08-12 18:59:36,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774388999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:36,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317366303] [2021-08-12 18:59:36,048 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 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 [2021-08-12 18:59:36,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:36,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:36,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:36,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:36,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:36,281 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:36,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:36,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:36,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:36,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-08-12 18:59:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317366303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:36,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:36,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:36,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661331202] [2021-08-12 18:59:36,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:36,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:36,383 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:36,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:36,816 INFO L93 Difference]: Finished difference Result 216 states and 592 transitions. [2021-08-12 18:59:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 18:59:36,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:36,817 INFO L225 Difference]: With dead ends: 216 [2021-08-12 18:59:36,817 INFO L226 Difference]: Without dead ends: 198 [2021-08-12 18:59:36,817 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:59:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-12 18:59:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-08-12 18:59:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-08-12 18:59:36,846 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-08-12 18:59:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:36,846 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-08-12 18:59:36,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-08-12 18:59:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:36,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:36,846 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:37,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6369,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:37,054 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-08-12 18:59:37,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:37,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867771394] [2021-08-12 18:59:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:37,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867771394] [2021-08-12 18:59:37,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867771394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129017563] [2021-08-12 18:59:37,180 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:37,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:59:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:37,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:37,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:37,415 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 18:59:38,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:38,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:38,621 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:38,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:38,884 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 18:59:38,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:38,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 18:59:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129017563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:38,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:38,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:38,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503212751] [2021-08-12 18:59:38,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:38,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:38,911 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:39,454 INFO L93 Difference]: Finished difference Result 237 states and 631 transitions. [2021-08-12 18:59:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:59:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:39,456 INFO L225 Difference]: With dead ends: 237 [2021-08-12 18:59:39,456 INFO L226 Difference]: Without dead ends: 225 [2021-08-12 18:59:39,456 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:59:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-12 18:59:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-08-12 18:59:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-08-12 18:59:39,485 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-08-12 18:59:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:39,485 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-08-12 18:59:39,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-08-12 18:59:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:39,486 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:39,486 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:39,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6405,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:39,686 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-08-12 18:59:39,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:39,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231523760] [2021-08-12 18:59:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:39,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231523760] [2021-08-12 18:59:39,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231523760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:39,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798421129] [2021-08-12 18:59:39,825 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 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 [2021-08-12 18:59:39,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:39,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:39,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:40,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:40,113 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 18:59:40,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:40,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:40,592 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:40,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:40,825 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 18:59:40,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:40,826 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 18:59:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798421129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:40,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:40,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:40,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446881336] [2021-08-12 18:59:40,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:40,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:40,857 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:41,522 INFO L93 Difference]: Finished difference Result 265 states and 681 transitions. [2021-08-12 18:59:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 18:59:41,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:41,524 INFO L225 Difference]: With dead ends: 265 [2021-08-12 18:59:41,524 INFO L226 Difference]: Without dead ends: 253 [2021-08-12 18:59:41,524 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:59:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-12 18:59:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-08-12 18:59:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-08-12 18:59:41,553 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-08-12 18:59:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:41,553 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-08-12 18:59:41,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-08-12 18:59:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:41,554 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:41,554 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:41,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6709 [2021-08-12 18:59:41,754 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-08-12 18:59:41,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:41,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193990779] [2021-08-12 18:59:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:41,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193990779] [2021-08-12 18:59:41,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193990779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743330735] [2021-08-12 18:59:41,789 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 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 [2021-08-12 18:59:41,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:59:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:41,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743330735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:41,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:41,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 18:59:41,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308313919] [2021-08-12 18:59:41,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:41,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:41,849 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:42,386 INFO L93 Difference]: Finished difference Result 366 states and 841 transitions. [2021-08-12 18:59:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:59:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:42,388 INFO L225 Difference]: With dead ends: 366 [2021-08-12 18:59:42,388 INFO L226 Difference]: Without dead ends: 357 [2021-08-12 18:59:42,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-12 18:59:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-08-12 18:59:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-08-12 18:59:42,422 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-08-12 18:59:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:42,422 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-08-12 18:59:42,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-08-12 18:59:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:42,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:42,423 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:42,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6875,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:42,627 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-08-12 18:59:42,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:42,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742075829] [2021-08-12 18:59:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:42,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:42,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742075829] [2021-08-12 18:59:42,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742075829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:42,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506896606] [2021-08-12 18:59:42,663 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 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 [2021-08-12 18:59:42,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:59:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:42,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506896606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:42,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:42,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:59:42,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521041540] [2021-08-12 18:59:42,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:42,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:42,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:42,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:42,724 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:43,208 INFO L93 Difference]: Finished difference Result 383 states and 874 transitions. [2021-08-12 18:59:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:59:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:43,210 INFO L225 Difference]: With dead ends: 383 [2021-08-12 18:59:43,210 INFO L226 Difference]: Without dead ends: 374 [2021-08-12 18:59:43,210 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-12 18:59:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-08-12 18:59:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-08-12 18:59:43,240 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-08-12 18:59:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:43,240 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-08-12 18:59:43,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-08-12 18:59:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:43,241 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:43,241 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:43,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6876,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:43,447 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:43,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-08-12 18:59:43,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:43,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927359177] [2021-08-12 18:59:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:43,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:43,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927359177] [2021-08-12 18:59:43,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927359177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:43,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216518990] [2021-08-12 18:59:43,644 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 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 [2021-08-12 18:59:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:43,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:43,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:43,883 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:43,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:43,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:43,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:43,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-08-12 18:59:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:43,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216518990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:43,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:43,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:43,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584988364] [2021-08-12 18:59:43,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:43,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:43,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:43,979 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:44,388 INFO L93 Difference]: Finished difference Result 211 states and 575 transitions. [2021-08-12 18:59:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:59:44,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:44,390 INFO L225 Difference]: With dead ends: 211 [2021-08-12 18:59:44,390 INFO L226 Difference]: Without dead ends: 193 [2021-08-12 18:59:44,390 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:59:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-12 18:59:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-08-12 18:59:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-08-12 18:59:44,433 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-08-12 18:59:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:44,433 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-08-12 18:59:44,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-08-12 18:59:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:44,434 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:44,434 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:44,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6877,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:44,645 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-08-12 18:59:44,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:44,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977585644] [2021-08-12 18:59:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:44,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:44,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977585644] [2021-08-12 18:59:44,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977585644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:44,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691908948] [2021-08-12 18:59:44,784 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 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 [2021-08-12 18:59:44,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:44,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:45,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:45,011 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 18:59:45,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:45,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:45,411 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:45,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:45,741 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 18:59:45,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:45,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 18:59:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:45,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691908948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:45,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:45,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:45,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056673252] [2021-08-12 18:59:45,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:45,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:45,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:45,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:45,768 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:46,178 INFO L93 Difference]: Finished difference Result 229 states and 609 transitions. [2021-08-12 18:59:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:59:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:46,180 INFO L225 Difference]: With dead ends: 229 [2021-08-12 18:59:46,180 INFO L226 Difference]: Without dead ends: 217 [2021-08-12 18:59:46,180 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:59:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-12 18:59:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-08-12 18:59:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-08-12 18:59:46,215 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-08-12 18:59:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:46,215 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-08-12 18:59:46,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-08-12 18:59:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:46,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:46,216 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:46,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6919 [2021-08-12 18:59:46,417 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-08-12 18:59:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:46,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659270244] [2021-08-12 18:59:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:46,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659270244] [2021-08-12 18:59:46,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659270244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632944212] [2021-08-12 18:59:46,451 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 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 [2021-08-12 18:59:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:59:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:46,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632944212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:46,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:46,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:59:46,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117573226] [2021-08-12 18:59:46,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:46,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:46,507 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:47,008 INFO L93 Difference]: Finished difference Result 388 states and 888 transitions. [2021-08-12 18:59:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:59:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:47,010 INFO L225 Difference]: With dead ends: 388 [2021-08-12 18:59:47,010 INFO L226 Difference]: Without dead ends: 377 [2021-08-12 18:59:47,010 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-12 18:59:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-08-12 18:59:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-08-12 18:59:47,042 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-08-12 18:59:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:47,042 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-08-12 18:59:47,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-08-12 18:59:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:47,042 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:47,042 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:47,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7094,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:47,243 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-08-12 18:59:47,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:47,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728843014] [2021-08-12 18:59:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:47,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:47,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728843014] [2021-08-12 18:59:47,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728843014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:47,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999919522] [2021-08-12 18:59:47,279 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 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 [2021-08-12 18:59:47,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:47,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999919522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:47,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:47,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 18:59:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612448930] [2021-08-12 18:59:47,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:59:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:59:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:47,334 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:47,958 INFO L93 Difference]: Finished difference Result 424 states and 955 transitions. [2021-08-12 18:59:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:59:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:47,960 INFO L225 Difference]: With dead ends: 424 [2021-08-12 18:59:47,961 INFO L226 Difference]: Without dead ends: 413 [2021-08-12 18:59:47,961 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:59:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-12 18:59:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-08-12 18:59:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-08-12 18:59:47,997 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-08-12 18:59:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:47,997 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-08-12 18:59:47,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-08-12 18:59:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:47,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:47,997 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:48,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7095,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:48,201 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-08-12 18:59:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677902188] [2021-08-12 18:59:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:48,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677902188] [2021-08-12 18:59:48,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677902188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263832133] [2021-08-12 18:59:48,344 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 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 [2021-08-12 18:59:48,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:59:48,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:48,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:48,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:48,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:48,555 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:48,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:48,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:48,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:48,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-08-12 18:59:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:48,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263832133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:48,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:48,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:48,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926162702] [2021-08-12 18:59:48,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:48,667 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:49,067 INFO L93 Difference]: Finished difference Result 220 states and 603 transitions. [2021-08-12 18:59:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:59:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:49,073 INFO L225 Difference]: With dead ends: 220 [2021-08-12 18:59:49,073 INFO L226 Difference]: Without dead ends: 202 [2021-08-12 18:59:49,073 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:59:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-12 18:59:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-08-12 18:59:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-08-12 18:59:49,104 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-08-12 18:59:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:49,105 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-08-12 18:59:49,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-08-12 18:59:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:49,105 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:49,105 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:49,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7096,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:49,306 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-08-12 18:59:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:49,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716625527] [2021-08-12 18:59:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:49,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:49,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716625527] [2021-08-12 18:59:49,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716625527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:49,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659257640] [2021-08-12 18:59:49,451 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 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 [2021-08-12 18:59:49,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:59:49,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:49,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:49,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:49,698 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 18:59:50,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-08-12 18:59:50,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:50,361 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:50,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:50,488 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-08-12 18:59:50,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:50,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 18:59:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:50,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659257640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:50,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:50,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514801081] [2021-08-12 18:59:50,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:50,517 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:51,048 INFO L93 Difference]: Finished difference Result 246 states and 658 transitions. [2021-08-12 18:59:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:59:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:51,050 INFO L225 Difference]: With dead ends: 246 [2021-08-12 18:59:51,050 INFO L226 Difference]: Without dead ends: 234 [2021-08-12 18:59:51,050 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:59:51,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-12 18:59:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-08-12 18:59:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-08-12 18:59:51,083 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-08-12 18:59:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:51,083 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-08-12 18:59:51,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-08-12 18:59:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:51,083 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:51,083 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:51,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7137 [2021-08-12 18:59:51,284 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-08-12 18:59:51,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:51,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268506392] [2021-08-12 18:59:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:51,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:51,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268506392] [2021-08-12 18:59:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268506392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:51,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635255255] [2021-08-12 18:59:51,320 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 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 [2021-08-12 18:59:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:51,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:51,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635255255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:51,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:51,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 18:59:51,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432855045] [2021-08-12 18:59:51,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:59:51,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:51,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:59:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:51,371 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:52,134 INFO L93 Difference]: Finished difference Result 438 states and 1006 transitions. [2021-08-12 18:59:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:59:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:52,136 INFO L225 Difference]: With dead ends: 438 [2021-08-12 18:59:52,136 INFO L226 Difference]: Without dead ends: 427 [2021-08-12 18:59:52,136 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:59:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-12 18:59:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-08-12 18:59:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-08-12 18:59:52,171 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-08-12 18:59:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:52,171 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-08-12 18:59:52,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-08-12 18:59:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:52,172 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:52,172 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:52,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7310 [2021-08-12 18:59:52,372 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-08-12 18:59:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:52,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445457087] [2021-08-12 18:59:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:52,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:52,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445457087] [2021-08-12 18:59:52,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445457087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:52,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563303532] [2021-08-12 18:59:52,410 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 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 [2021-08-12 18:59:52,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:52,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:52,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:52,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:52,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563303532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:52,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:52,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 18:59:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894063236] [2021-08-12 18:59:52,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:59:52,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:59:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:52,497 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:53,175 INFO L93 Difference]: Finished difference Result 387 states and 925 transitions. [2021-08-12 18:59:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:59:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:53,177 INFO L225 Difference]: With dead ends: 387 [2021-08-12 18:59:53,177 INFO L226 Difference]: Without dead ends: 378 [2021-08-12 18:59:53,178 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-12 18:59:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-08-12 18:59:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-08-12 18:59:53,226 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-08-12 18:59:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:53,226 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-08-12 18:59:53,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-08-12 18:59:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:53,227 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:53,227 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:53,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7311 [2021-08-12 18:59:53,427 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:53,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-08-12 18:59:53,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:53,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394699661] [2021-08-12 18:59:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:53,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:53,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394699661] [2021-08-12 18:59:53,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394699661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:53,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426184038] [2021-08-12 18:59:53,590 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 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 [2021-08-12 18:59:53,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:59:53,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:53,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:53,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:53,812 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:54,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:54,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:54,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:59:54,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-08-12 18:59:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:54,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426184038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:54,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:54,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:54,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781790008] [2021-08-12 18:59:54,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:54,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:54,020 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:54,471 INFO L93 Difference]: Finished difference Result 231 states and 641 transitions. [2021-08-12 18:59:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:59:54,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:54,473 INFO L225 Difference]: With dead ends: 231 [2021-08-12 18:59:54,473 INFO L226 Difference]: Without dead ends: 213 [2021-08-12 18:59:54,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 305.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:59:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-12 18:59:54,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-08-12 18:59:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-08-12 18:59:54,513 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-08-12 18:59:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:54,513 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-08-12 18:59:54,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-08-12 18:59:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:54,514 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:54,514 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:54,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7312 [2021-08-12 18:59:54,715 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:54,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:54,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-08-12 18:59:54,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:54,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590681823] [2021-08-12 18:59:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:54,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:54,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590681823] [2021-08-12 18:59:54,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590681823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:54,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998337204] [2021-08-12 18:59:54,858 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 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 [2021-08-12 18:59:54,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:54,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:54,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:59:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:55,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:55,086 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 18:59:55,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 18:59:55,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:59:55,467 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 18:59:55,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 18:59:55,658 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 18:59:55,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 18:59:55,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 18:59:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:55,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998337204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:55,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:55,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 18:59:55,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181336943] [2021-08-12 18:59:55,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 18:59:55,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 18:59:55,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:59:55,685 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:56,285 INFO L93 Difference]: Finished difference Result 258 states and 700 transitions. [2021-08-12 18:59:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 18:59:56,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 18:59:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:56,287 INFO L225 Difference]: With dead ends: 258 [2021-08-12 18:59:56,287 INFO L226 Difference]: Without dead ends: 246 [2021-08-12 18:59:56,287 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:59:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-12 18:59:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-08-12 18:59:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-08-12 18:59:56,323 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-08-12 18:59:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:56,323 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-08-12 18:59:56,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 18:59:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-08-12 18:59:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:56,324 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:56,324 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:56,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7386,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:56,524 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-08-12 18:59:56,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:56,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772988591] [2021-08-12 18:59:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:59:56,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:56,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772988591] [2021-08-12 18:59:56,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772988591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:56,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098916094] [2021-08-12 18:59:56,559 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 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 [2021-08-12 18:59:56,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:59:56,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:56,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:56,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:59:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098916094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:56,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:56,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 18:59:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788609772] [2021-08-12 18:59:56,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:59:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:56,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:59:56,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:59:56,606 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:57,083 INFO L93 Difference]: Finished difference Result 354 states and 863 transitions. [2021-08-12 18:59:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:59:57,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 17 [2021-08-12 18:59:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:57,085 INFO L225 Difference]: With dead ends: 354 [2021-08-12 18:59:57,085 INFO L226 Difference]: Without dead ends: 345 [2021-08-12 18:59:57,086 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-12 18:59:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-08-12 18:59:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-08-12 18:59:57,126 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-08-12 18:59:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:57,126 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-08-12 18:59:57,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-08-12 18:59:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:57,127 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:57,127 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:57,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7543 [2021-08-12 18:59:57,333 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-08-12 18:59:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:57,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734416169] [2021-08-12 18:59:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:57,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734416169] [2021-08-12 18:59:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734416169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66385312] [2021-08-12 18:59:57,364 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 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 [2021-08-12 18:59:57,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:59:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:57,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66385312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:57,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:57,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 18:59:57,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300575100] [2021-08-12 18:59:57,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:59:57,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:59:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:59:57,413 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:57,993 INFO L93 Difference]: Finished difference Result 380 states and 903 transitions. [2021-08-12 18:59:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:59:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:57,995 INFO L225 Difference]: With dead ends: 380 [2021-08-12 18:59:57,995 INFO L226 Difference]: Without dead ends: 369 [2021-08-12 18:59:57,995 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:59:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-12 18:59:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-08-12 18:59:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-08-12 18:59:58,037 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-08-12 18:59:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:58,037 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-08-12 18:59:58,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-08-12 18:59:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:58,038 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:58,038 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:58,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7544 [2021-08-12 18:59:58,238 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-08-12 18:59:58,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:58,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165194183] [2021-08-12 18:59:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:58,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:58,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165194183] [2021-08-12 18:59:58,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165194183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:58,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648781737] [2021-08-12 18:59:58,272 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 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 [2021-08-12 18:59:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:58,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:58,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648781737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:58,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:58,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 18:59:58,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162766905] [2021-08-12 18:59:58,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:59:58,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:59:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:58,348 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:59,326 INFO L93 Difference]: Finished difference Result 399 states and 916 transitions. [2021-08-12 18:59:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:59:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 18:59:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:59,328 INFO L225 Difference]: With dead ends: 399 [2021-08-12 18:59:59,328 INFO L226 Difference]: Without dead ends: 388 [2021-08-12 18:59:59,328 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:59:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-12 18:59:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-08-12 18:59:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 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) [2021-08-12 18:59:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-08-12 18:59:59,370 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-08-12 18:59:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:59,370 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-08-12 18:59:59,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-08-12 18:59:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:59:59,370 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:59,371 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:59,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7545,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:59,573 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-08-12 18:59:59,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:59,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235315878] [2021-08-12 18:59:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:59,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:59,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235315878] [2021-08-12 18:59:59,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235315878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:59,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201163479] [2021-08-12 18:59:59,604 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 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 [2021-08-12 18:59:59,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:59:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:59:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:59,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201163479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:59,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:59,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 18:59:59,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604740679] [2021-08-12 18:59:59,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:59:59,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:59,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:59:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:59:59,656 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:00,283 INFO L93 Difference]: Finished difference Result 328 states and 781 transitions. [2021-08-12 19:00:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:00:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:00:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:00,284 INFO L225 Difference]: With dead ends: 328 [2021-08-12 19:00:00,284 INFO L226 Difference]: Without dead ends: 319 [2021-08-12 19:00:00,284 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-12 19:00:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-08-12 19:00:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-08-12 19:00:00,329 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-08-12 19:00:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:00,329 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-08-12 19:00:00,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-08-12 19:00:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:00,330 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:00,330 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:00,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7546 [2021-08-12 19:00:00,531 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-08-12 19:00:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:00,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316871755] [2021-08-12 19:00:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:00,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316871755] [2021-08-12 19:00:00,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316871755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397963866] [2021-08-12 19:00:00,566 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 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 [2021-08-12 19:00:00,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:00:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:00,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397963866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:00,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:00,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:00,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122438868] [2021-08-12 19:00:00,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:00,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:00,619 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:01,438 INFO L93 Difference]: Finished difference Result 354 states and 861 transitions. [2021-08-12 19:00:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:00:01,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:00:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:01,439 INFO L225 Difference]: With dead ends: 354 [2021-08-12 19:00:01,439 INFO L226 Difference]: Without dead ends: 345 [2021-08-12 19:00:01,439 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:00:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-12 19:00:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-08-12 19:00:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-08-12 19:00:01,482 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-08-12 19:00:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:01,483 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-08-12 19:00:01,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-08-12 19:00:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:01,483 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:01,483 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:01,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7547,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:01,684 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-08-12 19:00:01,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:01,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894072045] [2021-08-12 19:00:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:01,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:01,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894072045] [2021-08-12 19:00:01,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894072045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:01,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58246258] [2021-08-12 19:00:01,827 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 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 [2021-08-12 19:00:01,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:01,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 19:00:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:02,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:02,069 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 19:00:02,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:02,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:02,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:02,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-08-12 19:00:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:02,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58246258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:02,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:02,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:02,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481753364] [2021-08-12 19:00:02,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:02,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:02,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:02,253 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 19:00:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:02,815 INFO L93 Difference]: Finished difference Result 243 states and 681 transitions. [2021-08-12 19:00:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:00:02,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 19:00:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:02,817 INFO L225 Difference]: With dead ends: 243 [2021-08-12 19:00:02,817 INFO L226 Difference]: Without dead ends: 225 [2021-08-12 19:00:02,817 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:00:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-12 19:00:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-08-12 19:00:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-08-12 19:00:02,865 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-08-12 19:00:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:02,865 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-08-12 19:00:02,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 19:00:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-08-12 19:00:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:02,865 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:02,865 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:03,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7548,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:03,073 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-08-12 19:00:03,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:03,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417797455] [2021-08-12 19:00:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:03,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417797455] [2021-08-12 19:00:03,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417797455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380799224] [2021-08-12 19:00:03,223 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 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 [2021-08-12 19:00:03,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:00:03,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:03,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 19:00:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:03,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:03,468 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 19:00:03,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:00:04,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:04,024 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 19:00:04,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:04,347 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 19:00:04,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:00:04,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 19:00:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:04,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380799224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:04,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:04,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:04,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991127193] [2021-08-12 19:00:04,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:04,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:04,375 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 19:00:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:05,212 INFO L93 Difference]: Finished difference Result 274 states and 756 transitions. [2021-08-12 19:00:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:00:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 19:00:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:05,214 INFO L225 Difference]: With dead ends: 274 [2021-08-12 19:00:05,214 INFO L226 Difference]: Without dead ends: 262 [2021-08-12 19:00:05,214 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:00:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-12 19:00:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-08-12 19:00:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-08-12 19:00:05,266 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-08-12 19:00:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:05,266 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-08-12 19:00:05,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 19:00:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-08-12 19:00:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:05,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:05,267 INFO L550 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:05,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7612,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:05,468 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:05,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-08-12 19:00:05,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:05,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426358683] [2021-08-12 19:00:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:05,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426358683] [2021-08-12 19:00:05,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426358683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201798070] [2021-08-12 19:00:05,694 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 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 [2021-08-12 19:00:05,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:00:05,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:05,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 19:00:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:06,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:06,025 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-08-12 19:00:06,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:00:06,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:06,762 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-12 19:00:06,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:06,989 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 19:00:06,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:00:06,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-08-12 19:00:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:07,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201798070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:07,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:07,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:07,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425199728] [2021-08-12 19:00:07,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:07,026 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 19:00:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:08,233 INFO L93 Difference]: Finished difference Result 306 states and 815 transitions. [2021-08-12 19:00:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:00:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 17 [2021-08-12 19:00:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:08,234 INFO L225 Difference]: With dead ends: 306 [2021-08-12 19:00:08,234 INFO L226 Difference]: Without dead ends: 294 [2021-08-12 19:00:08,235 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 690.5ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:00:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-12 19:00:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-08-12 19:00:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-08-12 19:00:08,284 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-08-12 19:00:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:08,284 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-08-12 19:00:08,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2021-08-12 19:00:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-08-12 19:00:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:08,284 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:08,284 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:08,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7795 [2021-08-12 19:00:08,485 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-08-12 19:00:08,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:08,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49376015] [2021-08-12 19:00:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:08,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:08,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49376015] [2021-08-12 19:00:08,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49376015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:08,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677876543] [2021-08-12 19:00:08,526 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 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 [2021-08-12 19:00:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:08,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:08,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677876543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:08,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:08,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:00:08,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240308756] [2021-08-12 19:00:08,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:00:08,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:00:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:08,582 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-12 19:00:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:09,479 INFO L93 Difference]: Finished difference Result 373 states and 890 transitions. [2021-08-12 19:00:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:00:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-12 19:00:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:09,481 INFO L225 Difference]: With dead ends: 373 [2021-08-12 19:00:09,481 INFO L226 Difference]: Without dead ends: 364 [2021-08-12 19:00:09,481 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:00:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-12 19:00:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-08-12 19:00:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-08-12 19:00:09,527 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-08-12 19:00:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:09,527 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-08-12 19:00:09,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-12 19:00:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-08-12 19:00:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:09,528 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:09,528 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7995 [2021-08-12 19:00:09,729 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-08-12 19:00:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699729005] [2021-08-12 19:00:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:09,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:09,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699729005] [2021-08-12 19:00:09,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699729005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:09,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616572260] [2021-08-12 19:00:09,770 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 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 [2021-08-12 19:00:09,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:00:09,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:00:09,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616572260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:09,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:09,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:00:09,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257544912] [2021-08-12 19:00:09,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:00:09,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:00:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:09,825 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-12 19:00:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:10,425 INFO L93 Difference]: Finished difference Result 355 states and 908 transitions. [2021-08-12 19:00:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:00:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-08-12 19:00:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:10,426 INFO L225 Difference]: With dead ends: 355 [2021-08-12 19:00:10,426 INFO L226 Difference]: Without dead ends: 346 [2021-08-12 19:00:10,427 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:00:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-12 19:00:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-08-12 19:00:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-08-12 19:00:10,478 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-08-12 19:00:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:10,478 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-08-12 19:00:10,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-08-12 19:00:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-08-12 19:00:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:10,479 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:10,479 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:10,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7996,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:10,679 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-08-12 19:00:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:10,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495823201] [2021-08-12 19:00:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:10,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:10,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495823201] [2021-08-12 19:00:10,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495823201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:10,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988066450] [2021-08-12 19:00:10,715 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 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 [2021-08-12 19:00:10,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:00:10,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988066450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:10,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:10,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:10,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207728818] [2021-08-12 19:00:10,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:10,772 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:11,619 INFO L93 Difference]: Finished difference Result 383 states and 951 transitions. [2021-08-12 19:00:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:00:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-12 19:00:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:11,621 INFO L225 Difference]: With dead ends: 383 [2021-08-12 19:00:11,621 INFO L226 Difference]: Without dead ends: 372 [2021-08-12 19:00:11,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:00:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-08-12 19:00:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-08-12 19:00:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-08-12 19:00:11,672 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-08-12 19:00:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:11,672 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-08-12 19:00:11,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-08-12 19:00:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:11,673 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:11,673 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:11,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7997,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:11,873 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-08-12 19:00:11,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:11,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543617998] [2021-08-12 19:00:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:11,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543617998] [2021-08-12 19:00:11,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543617998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92832494] [2021-08-12 19:00:11,910 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 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 [2021-08-12 19:00:11,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:11,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:11,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:11,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92832494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:11,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:11,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244750650] [2021-08-12 19:00:11,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:11,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:11,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:11,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:11,964 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:12,691 INFO L93 Difference]: Finished difference Result 344 states and 883 transitions. [2021-08-12 19:00:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:00:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-12 19:00:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:12,693 INFO L225 Difference]: With dead ends: 344 [2021-08-12 19:00:12,693 INFO L226 Difference]: Without dead ends: 335 [2021-08-12 19:00:12,693 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:00:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-12 19:00:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-08-12 19:00:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-08-12 19:00:12,748 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-08-12 19:00:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:12,748 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-08-12 19:00:12,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-08-12 19:00:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:12,748 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:12,749 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:12,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7998,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:12,949 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-08-12 19:00:12,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:12,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221391385] [2021-08-12 19:00:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:13,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:13,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221391385] [2021-08-12 19:00:13,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221391385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:13,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580168414] [2021-08-12 19:00:13,009 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 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 [2021-08-12 19:00:13,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:00:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:13,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580168414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:13,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:13,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:13,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962354592] [2021-08-12 19:00:13,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:13,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:13,073 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:13,980 INFO L93 Difference]: Finished difference Result 355 states and 915 transitions. [2021-08-12 19:00:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:00:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-12 19:00:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:13,981 INFO L225 Difference]: With dead ends: 355 [2021-08-12 19:00:13,981 INFO L226 Difference]: Without dead ends: 346 [2021-08-12 19:00:13,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:00:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-12 19:00:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-08-12 19:00:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-08-12 19:00:14,039 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-08-12 19:00:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:14,039 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-08-12 19:00:14,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-08-12 19:00:14,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:14,039 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:14,039 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:14,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7999,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:14,263 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:14,263 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-08-12 19:00:14,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:14,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085997013] [2021-08-12 19:00:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:14,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085997013] [2021-08-12 19:00:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085997013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669142614] [2021-08-12 19:00:14,315 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 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 [2021-08-12 19:00:14,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:00:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:14,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:00:14,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:14,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669142614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:14,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:14,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:14,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77072012] [2021-08-12 19:00:14,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:14,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:14,377 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:15,508 INFO L93 Difference]: Finished difference Result 394 states and 1036 transitions. [2021-08-12 19:00:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:00:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-12 19:00:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:15,509 INFO L225 Difference]: With dead ends: 394 [2021-08-12 19:00:15,510 INFO L226 Difference]: Without dead ends: 385 [2021-08-12 19:00:15,510 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-08-12 19:00:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-08-12 19:00:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-08-12 19:00:15,570 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-08-12 19:00:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:15,570 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-08-12 19:00:15,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-08-12 19:00:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:15,571 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:15,571 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:15,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8000 [2021-08-12 19:00:15,772 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-08-12 19:00:15,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:15,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384945071] [2021-08-12 19:00:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:15,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:15,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384945071] [2021-08-12 19:00:15,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384945071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:15,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958725888] [2021-08-12 19:00:15,878 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 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 [2021-08-12 19:00:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:16,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:16,146 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:16,999 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-08-12 19:00:17,109 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-08-12 19:00:17,223 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-08-12 19:00:17,368 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 221 [2021-08-12 19:00:17,527 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 232 [2021-08-12 19:00:17,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:17,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:17,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:17,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:17,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958725888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:17,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:17,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:17,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215088931] [2021-08-12 19:00:17,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:17,841 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:18,614 INFO L93 Difference]: Finished difference Result 315 states and 907 transitions. [2021-08-12 19:00:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:00:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-08-12 19:00:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:18,616 INFO L225 Difference]: With dead ends: 315 [2021-08-12 19:00:18,616 INFO L226 Difference]: Without dead ends: 301 [2021-08-12 19:00:18,616 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:00:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-12 19:00:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-08-12 19:00:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-08-12 19:00:18,704 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-08-12 19:00:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:18,704 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-08-12 19:00:18,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-08-12 19:00:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:18,705 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:18,705 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:18,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8001,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:18,908 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-08-12 19:00:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:18,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553556474] [2021-08-12 19:00:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:19,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553556474] [2021-08-12 19:00:19,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553556474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088268209] [2021-08-12 19:00:19,066 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 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 [2021-08-12 19:00:19,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:00:19,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:19,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:19,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:19,478 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:20,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:20,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:20,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:20,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:20,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088268209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:20,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:20,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:20,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113447748] [2021-08-12 19:00:20,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:20,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:20,171 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:21,451 INFO L93 Difference]: Finished difference Result 404 states and 1034 transitions. [2021-08-12 19:00:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:00:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:21,452 INFO L225 Difference]: With dead ends: 404 [2021-08-12 19:00:21,452 INFO L226 Difference]: Without dead ends: 392 [2021-08-12 19:00:21,453 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:00:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-12 19:00:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-08-12 19:00:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-08-12 19:00:21,525 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-08-12 19:00:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:21,525 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-08-12 19:00:21,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-08-12 19:00:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:21,526 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:21,526 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:21,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8203 [2021-08-12 19:00:21,726 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-08-12 19:00:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:21,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674840565] [2021-08-12 19:00:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:21,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:21,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674840565] [2021-08-12 19:00:21,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674840565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:21,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834457686] [2021-08-12 19:00:21,772 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 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 [2021-08-12 19:00:21,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:00:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834457686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:21,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:21,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:21,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336585716] [2021-08-12 19:00:21,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:21,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:21,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:21,833 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:23,147 INFO L93 Difference]: Finished difference Result 469 states and 1152 transitions. [2021-08-12 19:00:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:00:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-08-12 19:00:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:23,149 INFO L225 Difference]: With dead ends: 469 [2021-08-12 19:00:23,149 INFO L226 Difference]: Without dead ends: 460 [2021-08-12 19:00:23,149 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:00:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-12 19:00:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-08-12 19:00:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-08-12 19:00:23,225 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-08-12 19:00:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:23,225 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-08-12 19:00:23,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-08-12 19:00:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:23,226 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:23,226 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:23,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8310,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:23,427 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-08-12 19:00:23,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:23,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187555675] [2021-08-12 19:00:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:23,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:23,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187555675] [2021-08-12 19:00:23,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187555675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:23,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793214761] [2021-08-12 19:00:23,469 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 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 [2021-08-12 19:00:23,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:23,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:23,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793214761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:23,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:23,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 19:00:23,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921075134] [2021-08-12 19:00:23,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:23,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:23,532 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:25,028 INFO L93 Difference]: Finished difference Result 501 states and 1213 transitions. [2021-08-12 19:00:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:00:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-08-12 19:00:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:25,029 INFO L225 Difference]: With dead ends: 501 [2021-08-12 19:00:25,029 INFO L226 Difference]: Without dead ends: 492 [2021-08-12 19:00:25,030 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:00:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-12 19:00:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-08-12 19:00:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-08-12 19:00:25,101 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-08-12 19:00:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:25,101 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-08-12 19:00:25,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-08-12 19:00:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:25,101 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:25,101 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:25,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8311 [2021-08-12 19:00:25,302 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-08-12 19:00:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:25,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981910823] [2021-08-12 19:00:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:25,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:25,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981910823] [2021-08-12 19:00:25,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981910823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:25,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732042922] [2021-08-12 19:00:25,402 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 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 [2021-08-12 19:00:25,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:00:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:25,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:25,676 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:26,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:26,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:26,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:26,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:26,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732042922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:26,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:26,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:26,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620239606] [2021-08-12 19:00:26,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:26,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:26,025 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:26,759 INFO L93 Difference]: Finished difference Result 325 states and 906 transitions. [2021-08-12 19:00:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:00:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-08-12 19:00:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:26,761 INFO L225 Difference]: With dead ends: 325 [2021-08-12 19:00:26,761 INFO L226 Difference]: Without dead ends: 318 [2021-08-12 19:00:26,761 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:00:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-12 19:00:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-08-12 19:00:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-08-12 19:00:26,831 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-08-12 19:00:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:26,832 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-08-12 19:00:26,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-08-12 19:00:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:26,833 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:26,833 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:27,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8312 [2021-08-12 19:00:27,056 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-08-12 19:00:27,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:27,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810688608] [2021-08-12 19:00:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:27,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810688608] [2021-08-12 19:00:27,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810688608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379934383] [2021-08-12 19:00:27,142 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 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 [2021-08-12 19:00:27,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:00:27,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:27,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:27,471 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:28,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:28,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:28,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:28,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:28,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379934383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:28,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:28,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:28,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888618604] [2021-08-12 19:00:28,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:28,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:28,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:28,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:28,080 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:29,011 INFO L93 Difference]: Finished difference Result 335 states and 932 transitions. [2021-08-12 19:00:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:00:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:29,012 INFO L225 Difference]: With dead ends: 335 [2021-08-12 19:00:29,012 INFO L226 Difference]: Without dead ends: 322 [2021-08-12 19:00:29,012 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:00:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-12 19:00:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-08-12 19:00:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-08-12 19:00:29,083 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-08-12 19:00:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:29,083 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-08-12 19:00:29,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-08-12 19:00:29,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:29,084 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:29,084 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:29,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8409 [2021-08-12 19:00:29,285 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-08-12 19:00:29,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:29,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999561036] [2021-08-12 19:00:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:29,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:29,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999561036] [2021-08-12 19:00:29,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999561036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:29,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869336926] [2021-08-12 19:00:29,371 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 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 [2021-08-12 19:00:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:29,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:29,654 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:30,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:30,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:30,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:30,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869336926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680815556] [2021-08-12 19:00:30,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:30,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:30,681 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:31,762 INFO L93 Difference]: Finished difference Result 353 states and 962 transitions. [2021-08-12 19:00:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:00:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:31,763 INFO L225 Difference]: With dead ends: 353 [2021-08-12 19:00:31,763 INFO L226 Difference]: Without dead ends: 338 [2021-08-12 19:00:31,763 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:00:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-12 19:00:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-08-12 19:00:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-08-12 19:00:31,846 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-08-12 19:00:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:31,847 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-08-12 19:00:31,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-08-12 19:00:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:31,847 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:31,847 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:32,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8516,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:32,048 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-08-12 19:00:32,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:32,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123099051] [2021-08-12 19:00:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:32,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:32,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123099051] [2021-08-12 19:00:32,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123099051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:32,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494811316] [2021-08-12 19:00:32,089 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 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 [2021-08-12 19:00:32,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:00:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494811316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:32,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:32,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:00:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581541473] [2021-08-12 19:00:32,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:32,155 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:34,069 INFO L93 Difference]: Finished difference Result 536 states and 1282 transitions. [2021-08-12 19:00:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:00:34,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-08-12 19:00:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:34,071 INFO L225 Difference]: With dead ends: 536 [2021-08-12 19:00:34,071 INFO L226 Difference]: Without dead ends: 527 [2021-08-12 19:00:34,071 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:00:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-12 19:00:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-08-12 19:00:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-08-12 19:00:34,160 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-08-12 19:00:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:34,160 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-08-12 19:00:34,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-08-12 19:00:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:34,160 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:34,160 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:34,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8687 [2021-08-12 19:00:34,361 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-08-12 19:00:34,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:34,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096296615] [2021-08-12 19:00:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:34,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096296615] [2021-08-12 19:00:34,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096296615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004658436] [2021-08-12 19:00:34,458 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 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 [2021-08-12 19:00:34,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:00:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:34,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:34,784 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:35,344 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 284 [2021-08-12 19:00:36,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:36,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:36,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:36,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:36,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004658436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:36,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:36,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:36,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298675698] [2021-08-12 19:00:36,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:36,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:36,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:36,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:36,242 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:36,862 INFO L93 Difference]: Finished difference Result 309 states and 877 transitions. [2021-08-12 19:00:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:00:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-08-12 19:00:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:36,864 INFO L225 Difference]: With dead ends: 309 [2021-08-12 19:00:36,864 INFO L226 Difference]: Without dead ends: 302 [2021-08-12 19:00:36,864 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:00:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-12 19:00:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-08-12 19:00:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-08-12 19:00:36,974 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-08-12 19:00:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:36,974 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-08-12 19:00:36,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-08-12 19:00:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:36,975 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:36,975 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:37,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-08-12 19:00:37,175 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-08-12 19:00:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:37,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772428689] [2021-08-12 19:00:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:37,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772428689] [2021-08-12 19:00:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772428689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140202020] [2021-08-12 19:00:37,208 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 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 [2021-08-12 19:00:37,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:37,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:00:37,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140202020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:37,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:37,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:00:37,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813588375] [2021-08-12 19:00:37,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:00:37,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:37,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:00:37,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:37,261 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:38,925 INFO L93 Difference]: Finished difference Result 485 states and 1173 transitions. [2021-08-12 19:00:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:00:38,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:38,926 INFO L225 Difference]: With dead ends: 485 [2021-08-12 19:00:38,926 INFO L226 Difference]: Without dead ends: 474 [2021-08-12 19:00:38,927 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:00:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-12 19:00:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-08-12 19:00:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-08-12 19:00:39,014 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-08-12 19:00:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-08-12 19:00:39,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-08-12 19:00:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:39,015 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:39,015 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:39,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8868,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:39,215 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-08-12 19:00:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:39,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756644541] [2021-08-12 19:00:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:39,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756644541] [2021-08-12 19:00:39,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756644541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919827772] [2021-08-12 19:00:39,290 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 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 [2021-08-12 19:00:39,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:00:39,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:39,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:39,579 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:40,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:40,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:40,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:40,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:40,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919827772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:40,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:40,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:40,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102641207] [2021-08-12 19:00:40,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:40,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:40,102 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:41,187 INFO L93 Difference]: Finished difference Result 375 states and 1021 transitions. [2021-08-12 19:00:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:00:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:41,188 INFO L225 Difference]: With dead ends: 375 [2021-08-12 19:00:41,189 INFO L226 Difference]: Without dead ends: 356 [2021-08-12 19:00:41,189 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:00:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-12 19:00:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-08-12 19:00:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-08-12 19:00:41,275 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-08-12 19:00:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:41,275 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-08-12 19:00:41,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-08-12 19:00:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:41,276 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:41,276 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:41,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8869,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:41,477 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-08-12 19:00:41,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:41,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843452413] [2021-08-12 19:00:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:41,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843452413] [2021-08-12 19:00:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843452413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381639696] [2021-08-12 19:00:41,537 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 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 [2021-08-12 19:00:41,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:00:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:41,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381639696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:41,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:41,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:00:41,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877020690] [2021-08-12 19:00:41,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:41,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:41,606 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:43,606 INFO L93 Difference]: Finished difference Result 525 states and 1244 transitions. [2021-08-12 19:00:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:00:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-08-12 19:00:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:43,607 INFO L225 Difference]: With dead ends: 525 [2021-08-12 19:00:43,607 INFO L226 Difference]: Without dead ends: 514 [2021-08-12 19:00:43,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:00:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-08-12 19:00:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-08-12 19:00:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-08-12 19:00:43,705 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-08-12 19:00:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:43,705 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-08-12 19:00:43,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-08-12 19:00:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:43,705 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:43,706 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:43,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8982 [2021-08-12 19:00:43,906 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-08-12 19:00:43,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:43,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603173327] [2021-08-12 19:00:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:43,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:43,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603173327] [2021-08-12 19:00:43,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603173327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:43,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981785761] [2021-08-12 19:00:43,967 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 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 [2021-08-12 19:00:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:43,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:43,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981785761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:44,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:44,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:00:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573492347] [2021-08-12 19:00:44,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:00:44,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:00:44,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:00:44,026 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:00:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:46,469 INFO L93 Difference]: Finished difference Result 565 states and 1318 transitions. [2021-08-12 19:00:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:00:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-08-12 19:00:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:46,471 INFO L225 Difference]: With dead ends: 565 [2021-08-12 19:00:46,471 INFO L226 Difference]: Without dead ends: 554 [2021-08-12 19:00:46,471 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:00:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-12 19:00:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-08-12 19:00:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-08-12 19:00:46,560 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-08-12 19:00:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:46,560 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-08-12 19:00:46,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:00:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-08-12 19:00:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:46,560 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:46,561 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:46,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8983,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:46,761 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-08-12 19:00:46,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:46,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117666842] [2021-08-12 19:00:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:46,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:46,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117666842] [2021-08-12 19:00:46,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117666842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:46,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931472543] [2021-08-12 19:00:46,905 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 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 [2021-08-12 19:00:46,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:00:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:46,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:47,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:47,223 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:47,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:47,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:47,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:47,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:47,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931472543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:47,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:47,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:47,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624403528] [2021-08-12 19:00:47,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:47,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:47,609 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:48,250 INFO L93 Difference]: Finished difference Result 303 states and 870 transitions. [2021-08-12 19:00:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:00:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-08-12 19:00:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:48,252 INFO L225 Difference]: With dead ends: 303 [2021-08-12 19:00:48,252 INFO L226 Difference]: Without dead ends: 296 [2021-08-12 19:00:48,252 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:00:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-12 19:00:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-08-12 19:00:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-08-12 19:00:48,339 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-08-12 19:00:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:48,339 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-08-12 19:00:48,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:00:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-08-12 19:00:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:48,340 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:48,341 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:48,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8984 [2021-08-12 19:00:48,559 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:48,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-08-12 19:00:48,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:48,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895122061] [2021-08-12 19:00:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:00:48,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:48,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895122061] [2021-08-12 19:00:48,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895122061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:48,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026031229] [2021-08-12 19:00:48,587 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 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 [2021-08-12 19:00:48,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:00:48,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:48,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:00:48,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026031229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 19:00:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755509793] [2021-08-12 19:00:48,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:00:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:00:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:00:48,639 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:49,887 INFO L93 Difference]: Finished difference Result 444 states and 1126 transitions. [2021-08-12 19:00:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:00:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 18 [2021-08-12 19:00:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:49,890 INFO L225 Difference]: With dead ends: 444 [2021-08-12 19:00:49,890 INFO L226 Difference]: Without dead ends: 435 [2021-08-12 19:00:49,890 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-12 19:00:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-08-12 19:00:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-08-12 19:00:49,987 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-08-12 19:00:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:49,987 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-08-12 19:00:49,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-08-12 19:00:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:49,988 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:49,988 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:50,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9123,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:50,190 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-08-12 19:00:50,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:50,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538971107] [2021-08-12 19:00:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:50,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:50,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538971107] [2021-08-12 19:00:50,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538971107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:50,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007500805] [2021-08-12 19:00:50,222 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 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 [2021-08-12 19:00:50,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:50,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:00:50,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007500805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:50,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:50,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:00:50,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639797089] [2021-08-12 19:00:50,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:00:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:00:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:50,271 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:51,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:51,977 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-08-12 19:00:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:00:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:51,984 INFO L225 Difference]: With dead ends: 482 [2021-08-12 19:00:51,984 INFO L226 Difference]: Without dead ends: 471 [2021-08-12 19:00:51,985 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:00:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-12 19:00:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-08-12 19:00:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-08-12 19:00:52,085 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-08-12 19:00:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:52,085 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-08-12 19:00:52,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-08-12 19:00:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:52,086 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:52,086 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:52,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9124 [2021-08-12 19:00:52,301 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-08-12 19:00:52,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:52,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605380224] [2021-08-12 19:00:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:52,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:52,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605380224] [2021-08-12 19:00:52,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605380224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468354615] [2021-08-12 19:00:52,398 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 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 [2021-08-12 19:00:52,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:00:52,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:52,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:00:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:52,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:52,754 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:00:53,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:53,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:53,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:53,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:00:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468354615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:53,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:53,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:00:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488638171] [2021-08-12 19:00:53,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:00:53,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:00:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:53,192 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:54,317 INFO L93 Difference]: Finished difference Result 385 states and 1041 transitions. [2021-08-12 19:00:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:00:54,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:00:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:54,319 INFO L225 Difference]: With dead ends: 385 [2021-08-12 19:00:54,319 INFO L226 Difference]: Without dead ends: 366 [2021-08-12 19:00:54,319 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:00:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-08-12 19:00:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-08-12 19:00:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-08-12 19:00:54,412 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-08-12 19:00:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:54,412 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-08-12 19:00:54,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-08-12 19:00:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:54,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:54,412 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:54,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9125 [2021-08-12 19:00:54,615 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-08-12 19:00:54,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:54,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499268185] [2021-08-12 19:00:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:54,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:54,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499268185] [2021-08-12 19:00:54,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499268185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:54,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724079509] [2021-08-12 19:00:54,651 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 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 [2021-08-12 19:00:54,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:00:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:54,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:54,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724079509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:54,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:54,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:00:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770463077] [2021-08-12 19:00:54,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:00:54,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:54,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:00:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:00:54,705 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:56,730 INFO L93 Difference]: Finished difference Result 514 states and 1237 transitions. [2021-08-12 19:00:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:00:56,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-08-12 19:00:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:56,732 INFO L225 Difference]: With dead ends: 514 [2021-08-12 19:00:56,732 INFO L226 Difference]: Without dead ends: 503 [2021-08-12 19:00:56,732 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:00:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-12 19:00:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-08-12 19:00:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-08-12 19:00:56,872 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-08-12 19:00:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:56,872 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-08-12 19:00:56,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:00:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-08-12 19:00:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:56,873 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:56,873 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9256 [2021-08-12 19:00:57,093 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-08-12 19:00:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606416784] [2021-08-12 19:00:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:57,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606416784] [2021-08-12 19:00:57,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606416784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898799403] [2021-08-12 19:00:57,129 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 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 [2021-08-12 19:00:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:57,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898799403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:57,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:57,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:00:57,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411946207] [2021-08-12 19:00:57,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:00:57,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:00:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:00:57,194 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:00:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:59,716 INFO L93 Difference]: Finished difference Result 557 states and 1325 transitions. [2021-08-12 19:00:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:00:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-08-12 19:00:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:59,718 INFO L225 Difference]: With dead ends: 557 [2021-08-12 19:00:59,718 INFO L226 Difference]: Without dead ends: 546 [2021-08-12 19:00:59,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:00:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-12 19:00:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-08-12 19:00:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-08-12 19:00:59,823 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-08-12 19:00:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:59,823 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-08-12 19:00:59,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:00:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-08-12 19:00:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:00:59,824 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:59,824 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:00,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9257 [2021-08-12 19:01:00,024 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-08-12 19:01:00,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:00,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868490305] [2021-08-12 19:01:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:00,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868490305] [2021-08-12 19:01:00,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868490305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700134413] [2021-08-12 19:01:00,066 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 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 [2021-08-12 19:01:00,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700134413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:00,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:00,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966288189] [2021-08-12 19:01:00,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:00,122 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:02,522 INFO L93 Difference]: Finished difference Result 553 states and 1385 transitions. [2021-08-12 19:01:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:01:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-08-12 19:01:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:02,525 INFO L225 Difference]: With dead ends: 553 [2021-08-12 19:01:02,525 INFO L226 Difference]: Without dead ends: 544 [2021-08-12 19:01:02,525 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:01:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-12 19:01:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-08-12 19:01:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-08-12 19:01:02,644 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-08-12 19:01:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:02,644 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-08-12 19:01:02,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-08-12 19:01:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:02,645 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:02,645 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:02,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9258 [2021-08-12 19:01:02,859 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:02,860 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-08-12 19:01:02,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:02,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102923817] [2021-08-12 19:01:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:02,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102923817] [2021-08-12 19:01:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102923817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777248944] [2021-08-12 19:01:02,953 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 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 [2021-08-12 19:01:02,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:01:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:02,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 19:01:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:03,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:03,230 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:01:03,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:01:03,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:03,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:01:03,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:01:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:03,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777248944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:03,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:03,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:01:03,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024943514] [2021-08-12 19:01:03,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:01:03,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:01:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:03,622 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:01:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:04,600 INFO L93 Difference]: Finished difference Result 367 states and 1060 transitions. [2021-08-12 19:01:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:01:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-08-12 19:01:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:04,602 INFO L225 Difference]: With dead ends: 367 [2021-08-12 19:01:04,602 INFO L226 Difference]: Without dead ends: 360 [2021-08-12 19:01:04,602 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:01:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-12 19:01:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-08-12 19:01:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-08-12 19:01:04,709 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-08-12 19:01:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:04,709 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-08-12 19:01:04,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:01:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-08-12 19:01:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:04,709 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:04,709 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:04,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9259,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:04,910 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-08-12 19:01:04,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:04,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743156070] [2021-08-12 19:01:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:05,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:05,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743156070] [2021-08-12 19:01:05,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743156070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:05,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669381219] [2021-08-12 19:01:05,015 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 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 [2021-08-12 19:01:05,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:05,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:05,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:01:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:05,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:05,273 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:01:06,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:01:06,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:06,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:01:06,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:01:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:06,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669381219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:06,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:06,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:01:06,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216535028] [2021-08-12 19:01:06,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:01:06,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:06,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:01:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:06,215 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:07,351 INFO L93 Difference]: Finished difference Result 377 states and 1071 transitions. [2021-08-12 19:01:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:01:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:07,352 INFO L225 Difference]: With dead ends: 377 [2021-08-12 19:01:07,352 INFO L226 Difference]: Without dead ends: 370 [2021-08-12 19:01:07,353 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:01:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-12 19:01:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-08-12 19:01:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-08-12 19:01:07,459 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-08-12 19:01:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:07,459 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-08-12 19:01:07,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-08-12 19:01:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:07,460 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:07,460 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:07,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9355 [2021-08-12 19:01:07,673 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-08-12 19:01:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:07,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902161580] [2021-08-12 19:01:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:07,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:07,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902161580] [2021-08-12 19:01:07,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902161580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:07,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082802539] [2021-08-12 19:01:07,704 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 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 [2021-08-12 19:01:07,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:01:07,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:07,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082802539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:07,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:07,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:01:07,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249277122] [2021-08-12 19:01:07,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:07,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:07,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:07,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:07,754 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:09,590 INFO L93 Difference]: Finished difference Result 507 states and 1282 transitions. [2021-08-12 19:01:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:01:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:09,592 INFO L225 Difference]: With dead ends: 507 [2021-08-12 19:01:09,592 INFO L226 Difference]: Without dead ends: 498 [2021-08-12 19:01:09,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-12 19:01:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-08-12 19:01:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-08-12 19:01:09,745 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-08-12 19:01:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:09,746 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-08-12 19:01:09,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-08-12 19:01:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:09,746 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:09,746 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:09,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9540 [2021-08-12 19:01:09,961 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-08-12 19:01:09,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:09,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130088077] [2021-08-12 19:01:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:10,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:10,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130088077] [2021-08-12 19:01:10,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130088077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:10,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711178408] [2021-08-12 19:01:10,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:10,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:01:10,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:01:10,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711178408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:10,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:10,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:01:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028511764] [2021-08-12 19:01:10,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:10,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:10,080 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:11,599 INFO L93 Difference]: Finished difference Result 449 states and 1166 transitions. [2021-08-12 19:01:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:01:11,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:11,601 INFO L225 Difference]: With dead ends: 449 [2021-08-12 19:01:11,601 INFO L226 Difference]: Without dead ends: 440 [2021-08-12 19:01:11,602 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-12 19:01:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-08-12 19:01:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-08-12 19:01:11,711 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-08-12 19:01:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:11,712 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-08-12 19:01:11,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-08-12 19:01:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:11,712 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:11,712 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:11,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9541 [2021-08-12 19:01:11,913 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-08-12 19:01:11,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:11,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546910779] [2021-08-12 19:01:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:11,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:11,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546910779] [2021-08-12 19:01:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546910779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:11,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589711836] [2021-08-12 19:01:11,998 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 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 [2021-08-12 19:01:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:01:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:12,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:12,280 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:01:12,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:01:12,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:12,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:01:12,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:01:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:12,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589711836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:12,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:12,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:01:12,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861098094] [2021-08-12 19:01:12,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:01:12,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:01:12,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:12,955 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:14,182 INFO L93 Difference]: Finished difference Result 388 states and 1063 transitions. [2021-08-12 19:01:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:01:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:14,183 INFO L225 Difference]: With dead ends: 388 [2021-08-12 19:01:14,183 INFO L226 Difference]: Without dead ends: 373 [2021-08-12 19:01:14,183 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:01:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-12 19:01:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-08-12 19:01:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-08-12 19:01:14,291 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-08-12 19:01:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:14,291 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-08-12 19:01:14,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-08-12 19:01:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:14,291 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:14,291 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9542,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:14,493 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-08-12 19:01:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010153882] [2021-08-12 19:01:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:14,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:14,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010153882] [2021-08-12 19:01:14,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010153882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:14,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356528803] [2021-08-12 19:01:14,529 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 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 [2021-08-12 19:01:14,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:14,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:14,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:14,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356528803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:14,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:14,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:01:14,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234355461] [2021-08-12 19:01:14,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:14,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:14,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:14,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:14,578 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:01:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:16,593 INFO L93 Difference]: Finished difference Result 483 states and 1217 transitions. [2021-08-12 19:01:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:01:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-08-12 19:01:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:16,594 INFO L225 Difference]: With dead ends: 483 [2021-08-12 19:01:16,594 INFO L226 Difference]: Without dead ends: 472 [2021-08-12 19:01:16,594 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-12 19:01:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-08-12 19:01:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-08-12 19:01:16,708 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-08-12 19:01:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:16,709 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-08-12 19:01:16,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:01:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-08-12 19:01:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:16,709 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:16,709 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:16,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9701,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:16,910 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-08-12 19:01:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:16,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105347325] [2021-08-12 19:01:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:16,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105347325] [2021-08-12 19:01:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105347325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465278534] [2021-08-12 19:01:16,945 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 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 [2021-08-12 19:01:16,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:01:16,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465278534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:17,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:17,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027416898] [2021-08-12 19:01:17,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:17,004 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:19,499 INFO L93 Difference]: Finished difference Result 501 states and 1225 transitions. [2021-08-12 19:01:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:01:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-08-12 19:01:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:19,501 INFO L225 Difference]: With dead ends: 501 [2021-08-12 19:01:19,501 INFO L226 Difference]: Without dead ends: 490 [2021-08-12 19:01:19,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-12 19:01:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-08-12 19:01:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-08-12 19:01:19,617 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-08-12 19:01:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:19,617 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-08-12 19:01:19,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-08-12 19:01:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:19,618 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:19,618 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:19,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9702,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:19,818 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-08-12 19:01:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:19,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545383144] [2021-08-12 19:01:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:19,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:19,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545383144] [2021-08-12 19:01:19,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545383144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:19,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040847088] [2021-08-12 19:01:19,856 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 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 [2021-08-12 19:01:19,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:19,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040847088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:19,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:19,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:19,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063926645] [2021-08-12 19:01:19,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:19,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:19,913 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:22,217 INFO L93 Difference]: Finished difference Result 442 states and 1115 transitions. [2021-08-12 19:01:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:01:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-08-12 19:01:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:22,245 INFO L225 Difference]: With dead ends: 442 [2021-08-12 19:01:22,245 INFO L226 Difference]: Without dead ends: 433 [2021-08-12 19:01:22,246 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:01:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-12 19:01:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-08-12 19:01:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-08-12 19:01:22,563 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-08-12 19:01:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:22,564 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-08-12 19:01:22,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-08-12 19:01:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:22,565 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:22,565 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:22,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9703,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:22,786 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:22,786 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-08-12 19:01:22,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:22,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322898218] [2021-08-12 19:01:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:22,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:22,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322898218] [2021-08-12 19:01:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322898218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:22,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489870416] [2021-08-12 19:01:22,828 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 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 [2021-08-12 19:01:22,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:01:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:22,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489870416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:22,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:22,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:22,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904506947] [2021-08-12 19:01:22,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:22,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:22,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:22,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:22,886 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:25,614 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-08-12 19:01:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:01:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-08-12 19:01:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:25,616 INFO L225 Difference]: With dead ends: 483 [2021-08-12 19:01:25,616 INFO L226 Difference]: Without dead ends: 474 [2021-08-12 19:01:25,616 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:01:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-12 19:01:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-08-12 19:01:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-08-12 19:01:25,732 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-08-12 19:01:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:25,732 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-08-12 19:01:25,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-12 19:01:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-08-12 19:01:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:25,733 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:25,733 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:25,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9704,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:25,934 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-08-12 19:01:25,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:25,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467120081] [2021-08-12 19:01:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:26,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:26,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467120081] [2021-08-12 19:01:26,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467120081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:26,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130597757] [2021-08-12 19:01:26,049 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 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 [2021-08-12 19:01:26,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:01:26,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:26,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:01:26,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:26,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:26,332 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:01:27,424 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 234 [2021-08-12 19:01:27,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:01:27,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:27,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:01:27,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:01:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130597757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:01:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289371021] [2021-08-12 19:01:27,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:01:27,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:01:27,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:27,646 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:01:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:28,803 INFO L93 Difference]: Finished difference Result 383 states and 1118 transitions. [2021-08-12 19:01:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:01:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-08-12 19:01:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:28,804 INFO L225 Difference]: With dead ends: 383 [2021-08-12 19:01:28,804 INFO L226 Difference]: Without dead ends: 376 [2021-08-12 19:01:28,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:01:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-12 19:01:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-08-12 19:01:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-08-12 19:01:28,926 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-08-12 19:01:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:28,926 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-08-12 19:01:28,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-08-12 19:01:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-08-12 19:01:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:28,927 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:28,927 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:29,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9705 [2021-08-12 19:01:29,127 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-08-12 19:01:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:29,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901211180] [2021-08-12 19:01:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:29,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:29,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901211180] [2021-08-12 19:01:29,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901211180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:29,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144104273] [2021-08-12 19:01:29,236 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 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 [2021-08-12 19:01:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:29,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:01:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:29,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:29,541 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:01:30,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:01:30,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:30,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:01:30,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:01:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144104273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:30,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:30,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:01:30,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575940781] [2021-08-12 19:01:30,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:01:30,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:30,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:01:30,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:30,505 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:31,818 INFO L93 Difference]: Finished difference Result 398 states and 1136 transitions. [2021-08-12 19:01:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:01:31,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:31,820 INFO L225 Difference]: With dead ends: 398 [2021-08-12 19:01:31,820 INFO L226 Difference]: Without dead ends: 391 [2021-08-12 19:01:31,820 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:01:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-12 19:01:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-08-12 19:01:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-08-12 19:01:31,947 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-08-12 19:01:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:31,947 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-08-12 19:01:31,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-08-12 19:01:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:31,948 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:31,948 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:32,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:32,170 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-08-12 19:01:32,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:32,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073070491] [2021-08-12 19:01:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:32,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:32,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073070491] [2021-08-12 19:01:32,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073070491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:32,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952904029] [2021-08-12 19:01:32,213 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 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 [2021-08-12 19:01:32,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:32,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:32,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:32,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952904029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:32,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:32,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:01:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422760442] [2021-08-12 19:01:32,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:32,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:32,270 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:34,723 INFO L93 Difference]: Finished difference Result 548 states and 1382 transitions. [2021-08-12 19:01:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:01:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:34,725 INFO L225 Difference]: With dead ends: 548 [2021-08-12 19:01:34,725 INFO L226 Difference]: Without dead ends: 539 [2021-08-12 19:01:34,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-12 19:01:34,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-08-12 19:01:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-08-12 19:01:34,857 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-08-12 19:01:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:34,857 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-08-12 19:01:34,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-08-12 19:01:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:34,858 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:34,858 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:35,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10133 [2021-08-12 19:01:35,059 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-08-12 19:01:35,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:35,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105865076] [2021-08-12 19:01:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:35,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:35,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105865076] [2021-08-12 19:01:35,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105865076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:35,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000900431] [2021-08-12 19:01:35,107 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 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 [2021-08-12 19:01:35,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:01:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:35,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000900431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:35,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:35,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:01:35,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891207362] [2021-08-12 19:01:35,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:35,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:35,158 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:37,515 INFO L93 Difference]: Finished difference Result 525 states and 1374 transitions. [2021-08-12 19:01:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:01:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:37,517 INFO L225 Difference]: With dead ends: 525 [2021-08-12 19:01:37,517 INFO L226 Difference]: Without dead ends: 516 [2021-08-12 19:01:37,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:01:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-12 19:01:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-08-12 19:01:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-08-12 19:01:37,669 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-08-12 19:01:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:37,669 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-08-12 19:01:37,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-08-12 19:01:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:37,670 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:37,670 INFO L550 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:37,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10134 [2021-08-12 19:01:37,870 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-08-12 19:01:37,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:37,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34539315] [2021-08-12 19:01:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:37,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:37,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34539315] [2021-08-12 19:01:37,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34539315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:37,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678632647] [2021-08-12 19:01:37,940 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 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 [2021-08-12 19:01:37,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:01:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:38,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:38,206 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 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-08-12 19:01:38,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:01:38,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:01:38,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:01:38,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-08-12 19:01:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678632647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:01:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46985586] [2021-08-12 19:01:38,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:01:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:01:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:38,601 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:39,937 INFO L93 Difference]: Finished difference Result 422 states and 1203 transitions. [2021-08-12 19:01:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:01:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:39,938 INFO L225 Difference]: With dead ends: 422 [2021-08-12 19:01:39,938 INFO L226 Difference]: Without dead ends: 415 [2021-08-12 19:01:39,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:01:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-12 19:01:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-08-12 19:01:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-08-12 19:01:40,068 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-08-12 19:01:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:40,068 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-08-12 19:01:40,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-08-12 19:01:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:40,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:40,069 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:40,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10135 [2021-08-12 19:01:40,270 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-08-12 19:01:40,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:40,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341465126] [2021-08-12 19:01:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:40,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:40,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341465126] [2021-08-12 19:01:40,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341465126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:40,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866565416] [2021-08-12 19:01:40,310 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 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 [2021-08-12 19:01:40,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:01:40,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:40,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866565416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:40,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:40,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:01:40,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959158922] [2021-08-12 19:01:40,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:40,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:40,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:40,359 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:42,031 INFO L93 Difference]: Finished difference Result 498 states and 1379 transitions. [2021-08-12 19:01:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:01:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:42,032 INFO L225 Difference]: With dead ends: 498 [2021-08-12 19:01:42,033 INFO L226 Difference]: Without dead ends: 489 [2021-08-12 19:01:42,033 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-12 19:01:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-08-12 19:01:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-08-12 19:01:42,169 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-08-12 19:01:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:42,169 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-08-12 19:01:42,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-08-12 19:01:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:42,170 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:42,170 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:42,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-08-12 19:01:42,371 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-08-12 19:01:42,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:42,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201073436] [2021-08-12 19:01:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:42,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201073436] [2021-08-12 19:01:42,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201073436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28696994] [2021-08-12 19:01:42,416 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 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 [2021-08-12 19:01:42,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:01:42,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:42,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:42,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28696994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:42,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:42,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:42,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898918629] [2021-08-12 19:01:42,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:42,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:42,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:42,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:42,489 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:44,810 INFO L93 Difference]: Finished difference Result 532 states and 1431 transitions. [2021-08-12 19:01:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:01:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:44,811 INFO L225 Difference]: With dead ends: 532 [2021-08-12 19:01:44,811 INFO L226 Difference]: Without dead ends: 521 [2021-08-12 19:01:44,812 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:01:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-12 19:01:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-08-12 19:01:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-08-12 19:01:44,953 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-08-12 19:01:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:44,953 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-08-12 19:01:44,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-08-12 19:01:44,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:44,954 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:44,954 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:45,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10245 [2021-08-12 19:01:45,155 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-08-12 19:01:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:45,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989020389] [2021-08-12 19:01:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:45,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:45,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989020389] [2021-08-12 19:01:45,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989020389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:45,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301996294] [2021-08-12 19:01:45,197 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 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 [2021-08-12 19:01:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301996294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:45,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:45,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:45,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545418930] [2021-08-12 19:01:45,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:45,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:45,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:45,252 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:47,676 INFO L93 Difference]: Finished difference Result 510 states and 1396 transitions. [2021-08-12 19:01:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:01:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:47,678 INFO L225 Difference]: With dead ends: 510 [2021-08-12 19:01:47,678 INFO L226 Difference]: Without dead ends: 501 [2021-08-12 19:01:47,678 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:01:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-12 19:01:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-08-12 19:01:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-08-12 19:01:47,829 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-08-12 19:01:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:47,829 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-08-12 19:01:47,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-08-12 19:01:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:47,830 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:47,830 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:48,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10246 [2021-08-12 19:01:48,030 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-08-12 19:01:48,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:48,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450610213] [2021-08-12 19:01:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:48,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450610213] [2021-08-12 19:01:48,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450610213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616044166] [2021-08-12 19:01:48,078 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 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 [2021-08-12 19:01:48,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:48,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616044166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:48,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:48,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:48,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783119775] [2021-08-12 19:01:48,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:48,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:48,132 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:50,844 INFO L93 Difference]: Finished difference Result 521 states and 1439 transitions. [2021-08-12 19:01:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:01:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:50,846 INFO L225 Difference]: With dead ends: 521 [2021-08-12 19:01:50,846 INFO L226 Difference]: Without dead ends: 512 [2021-08-12 19:01:50,847 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:01:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-12 19:01:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-08-12 19:01:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-08-12 19:01:50,996 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-08-12 19:01:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:50,996 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-08-12 19:01:50,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-08-12 19:01:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:01:50,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:50,997 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:51,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:51,197 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-08-12 19:01:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:51,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515453745] [2021-08-12 19:01:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:51,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:51,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515453745] [2021-08-12 19:01:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515453745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:51,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524113742] [2021-08-12 19:01:51,244 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 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 [2021-08-12 19:01:51,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:01:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524113742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:51,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:51,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:01:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108157303] [2021-08-12 19:01:51,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:51,301 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:55,149 INFO L93 Difference]: Finished difference Result 603 states and 1652 transitions. [2021-08-12 19:01:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:01:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:01:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:55,151 INFO L225 Difference]: With dead ends: 603 [2021-08-12 19:01:55,151 INFO L226 Difference]: Without dead ends: 594 [2021-08-12 19:01:55,151 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:01:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-12 19:01:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-08-12 19:01:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-08-12 19:01:55,336 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-08-12 19:01:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:55,336 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-08-12 19:01:55,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-08-12 19:01:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:01:55,337 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:55,337 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:55,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-08-12 19:01:55,537 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-08-12 19:01:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:55,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859401654] [2021-08-12 19:01:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:55,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859401654] [2021-08-12 19:01:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859401654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031895715] [2021-08-12 19:01:55,590 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 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 [2021-08-12 19:01:55,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:55,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031895715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:55,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:55,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:01:55,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957771168] [2021-08-12 19:01:55,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:01:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:01:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:01:55,667 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:57,314 INFO L93 Difference]: Finished difference Result 547 states and 1500 transitions. [2021-08-12 19:01:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:01:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:01:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:57,316 INFO L225 Difference]: With dead ends: 547 [2021-08-12 19:01:57,316 INFO L226 Difference]: Without dead ends: 532 [2021-08-12 19:01:57,316 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:01:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-12 19:01:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-08-12 19:01:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-08-12 19:01:57,489 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-08-12 19:01:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:57,490 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-08-12 19:01:57,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-08-12 19:01:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:01:57,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:57,490 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:57,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10249 [2021-08-12 19:01:57,691 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-08-12 19:01:57,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:57,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593594061] [2021-08-12 19:01:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:57,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:57,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593594061] [2021-08-12 19:01:57,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593594061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:57,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028294875] [2021-08-12 19:01:57,740 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 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 [2021-08-12 19:01:57,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:01:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:57,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028294875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:57,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:57,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:01:57,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443477541] [2021-08-12 19:01:57,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:01:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:01:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:01:57,792 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:00,866 INFO L93 Difference]: Finished difference Result 615 states and 1619 transitions. [2021-08-12 19:02:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:02:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:00,868 INFO L225 Difference]: With dead ends: 615 [2021-08-12 19:02:00,868 INFO L226 Difference]: Without dead ends: 597 [2021-08-12 19:02:00,868 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:02:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-12 19:02:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-08-12 19:02:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-08-12 19:02:01,059 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-08-12 19:02:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:01,059 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-08-12 19:02:01,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-08-12 19:02:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:01,059 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:01,059 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:01,260 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-08-12 19:02:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:01,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622474314] [2021-08-12 19:02:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:01,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622474314] [2021-08-12 19:02:01,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622474314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958880280] [2021-08-12 19:02:01,303 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 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 [2021-08-12 19:02:01,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:02:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:01,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958880280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:01,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:01,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:02:01,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126941359] [2021-08-12 19:02:01,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:01,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:01,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:01,355 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:02,853 INFO L93 Difference]: Finished difference Result 477 states and 1378 transitions. [2021-08-12 19:02:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:02:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:02,855 INFO L225 Difference]: With dead ends: 477 [2021-08-12 19:02:02,855 INFO L226 Difference]: Without dead ends: 462 [2021-08-12 19:02:02,855 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:02:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-12 19:02:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-08-12 19:02:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-08-12 19:02:03,047 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-08-12 19:02:03,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:03,047 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-08-12 19:02:03,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-08-12 19:02:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:03,048 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:03,048 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:03,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:03,248 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-08-12 19:02:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:03,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578454184] [2021-08-12 19:02:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:03,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578454184] [2021-08-12 19:02:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578454184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489401158] [2021-08-12 19:02:03,290 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 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 [2021-08-12 19:02:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:03,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489401158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:03,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:03,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:02:03,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707679432] [2021-08-12 19:02:03,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:03,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:03,350 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:06,429 INFO L93 Difference]: Finished difference Result 606 states and 1578 transitions. [2021-08-12 19:02:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:02:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:06,431 INFO L225 Difference]: With dead ends: 606 [2021-08-12 19:02:06,431 INFO L226 Difference]: Without dead ends: 597 [2021-08-12 19:02:06,431 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:02:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-12 19:02:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-08-12 19:02:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-08-12 19:02:06,640 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-08-12 19:02:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:06,640 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-08-12 19:02:06,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-08-12 19:02:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:06,641 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:06,641 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:06,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:06,842 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-08-12 19:02:06,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:06,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150808270] [2021-08-12 19:02:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:06,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:06,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150808270] [2021-08-12 19:02:06,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150808270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:06,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851132569] [2021-08-12 19:02:06,890 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 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 [2021-08-12 19:02:06,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:02:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:06,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:06,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851132569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:06,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:06,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:02:06,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829610711] [2021-08-12 19:02:06,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:06,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:06,942 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:08,534 INFO L93 Difference]: Finished difference Result 498 states and 1419 transitions. [2021-08-12 19:02:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:02:08,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:08,536 INFO L225 Difference]: With dead ends: 498 [2021-08-12 19:02:08,536 INFO L226 Difference]: Without dead ends: 485 [2021-08-12 19:02:08,536 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:02:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-12 19:02:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-08-12 19:02:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-08-12 19:02:08,781 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-08-12 19:02:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:08,781 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-08-12 19:02:08,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-08-12 19:02:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:08,782 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:08,782 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:08,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:08,982 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-08-12 19:02:08,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:08,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946796871] [2021-08-12 19:02:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:09,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:09,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946796871] [2021-08-12 19:02:09,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946796871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:09,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572647229] [2021-08-12 19:02:09,047 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 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 [2021-08-12 19:02:09,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:02:09,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:09,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:09,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572647229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:09,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:09,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:02:09,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698507811] [2021-08-12 19:02:09,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:09,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:09,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:09,111 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:12,850 INFO L93 Difference]: Finished difference Result 645 states and 1658 transitions. [2021-08-12 19:02:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:02:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:12,851 INFO L225 Difference]: With dead ends: 645 [2021-08-12 19:02:12,852 INFO L226 Difference]: Without dead ends: 636 [2021-08-12 19:02:12,852 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:02:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-12 19:02:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-08-12 19:02:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-08-12 19:02:13,065 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-08-12 19:02:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:13,065 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-08-12 19:02:13,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-08-12 19:02:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:13,066 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:13,066 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:13,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-08-12 19:02:13,266 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:13,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-08-12 19:02:13,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:13,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950326370] [2021-08-12 19:02:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:13,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:13,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950326370] [2021-08-12 19:02:13,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950326370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:13,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13107740] [2021-08-12 19:02:13,307 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 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 [2021-08-12 19:02:13,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:02:13,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:13,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:13,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:13,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13107740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:13,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:13,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:02:13,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099785478] [2021-08-12 19:02:13,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:13,359 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:15,005 INFO L93 Difference]: Finished difference Result 497 states and 1393 transitions. [2021-08-12 19:02:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:02:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:15,006 INFO L225 Difference]: With dead ends: 497 [2021-08-12 19:02:15,006 INFO L226 Difference]: Without dead ends: 482 [2021-08-12 19:02:15,007 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:02:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-12 19:02:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-08-12 19:02:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-08-12 19:02:15,218 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-08-12 19:02:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:15,218 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-08-12 19:02:15,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-08-12 19:02:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:15,218 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:15,218 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:15,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10255 [2021-08-12 19:02:15,421 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:15,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-08-12 19:02:15,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:15,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506176233] [2021-08-12 19:02:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:15,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:15,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506176233] [2021-08-12 19:02:15,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506176233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:15,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697491977] [2021-08-12 19:02:15,467 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 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 [2021-08-12 19:02:15,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:02:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:15,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697491977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:15,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:15,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 19:02:15,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894294387] [2021-08-12 19:02:15,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:15,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:15,525 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:19,871 INFO L93 Difference]: Finished difference Result 677 states and 1725 transitions. [2021-08-12 19:02:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:02:19,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:19,873 INFO L225 Difference]: With dead ends: 677 [2021-08-12 19:02:19,873 INFO L226 Difference]: Without dead ends: 668 [2021-08-12 19:02:19,873 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:02:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-08-12 19:02:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-08-12 19:02:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 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) [2021-08-12 19:02:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-08-12 19:02:20,085 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-08-12 19:02:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:20,085 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-08-12 19:02:20,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-08-12 19:02:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:20,086 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:20,086 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:20,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10256 [2021-08-12 19:02:20,286 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-08-12 19:02:20,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:20,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297164040] [2021-08-12 19:02:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:20,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:20,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297164040] [2021-08-12 19:02:20,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297164040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:20,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973319770] [2021-08-12 19:02:20,331 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 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 [2021-08-12 19:02:20,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:02:20,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:20,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973319770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:20,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:20,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:02:20,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830650177] [2021-08-12 19:02:20,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:20,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:20,389 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:22,109 INFO L93 Difference]: Finished difference Result 530 states and 1494 transitions. [2021-08-12 19:02:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:02:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:22,112 INFO L225 Difference]: With dead ends: 530 [2021-08-12 19:02:22,112 INFO L226 Difference]: Without dead ends: 513 [2021-08-12 19:02:22,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:02:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-12 19:02:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-08-12 19:02:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-08-12 19:02:22,355 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-08-12 19:02:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:22,355 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-08-12 19:02:22,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-08-12 19:02:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:22,356 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:22,356 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10257 [2021-08-12 19:02:22,557 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-08-12 19:02:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:22,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334709925] [2021-08-12 19:02:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:22,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:22,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334709925] [2021-08-12 19:02:22,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334709925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:22,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986687432] [2021-08-12 19:02:22,599 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 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 [2021-08-12 19:02:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:22,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986687432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:22,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:22,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:02:22,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279370676] [2021-08-12 19:02:22,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:22,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:22,652 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:27,605 INFO L93 Difference]: Finished difference Result 699 states and 1777 transitions. [2021-08-12 19:02:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:02:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:27,607 INFO L225 Difference]: With dead ends: 699 [2021-08-12 19:02:27,607 INFO L226 Difference]: Without dead ends: 690 [2021-08-12 19:02:27,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:02:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-08-12 19:02:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-08-12 19:02:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-08-12 19:02:27,817 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-08-12 19:02:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:27,817 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-08-12 19:02:27,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-08-12 19:02:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:27,817 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:27,817 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:28,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-08-12 19:02:28,018 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-08-12 19:02:28,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:28,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103924202] [2021-08-12 19:02:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:28,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103924202] [2021-08-12 19:02:28,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103924202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380849932] [2021-08-12 19:02:28,045 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 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 [2021-08-12 19:02:28,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:02:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:28,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:02:28,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380849932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:28,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:28,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 19:02:28,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303071037] [2021-08-12 19:02:28,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:02:28,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:02:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:02:28,098 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:29,988 INFO L93 Difference]: Finished difference Result 596 states and 1662 transitions. [2021-08-12 19:02:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:02:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:29,990 INFO L225 Difference]: With dead ends: 596 [2021-08-12 19:02:29,990 INFO L226 Difference]: Without dead ends: 587 [2021-08-12 19:02:29,990 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:02:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-12 19:02:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-08-12 19:02:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-08-12 19:02:30,201 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-08-12 19:02:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:30,201 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-08-12 19:02:30,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-08-12 19:02:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:30,201 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:30,202 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:30,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:30,402 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-08-12 19:02:30,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:30,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130308595] [2021-08-12 19:02:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:30,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130308595] [2021-08-12 19:02:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130308595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500274494] [2021-08-12 19:02:30,432 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:30,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:02:30,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:02:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500274494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 19:02:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138965464] [2021-08-12 19:02:30,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:02:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:02:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:02:30,485 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:33,193 INFO L93 Difference]: Finished difference Result 590 states and 1608 transitions. [2021-08-12 19:02:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:02:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:33,195 INFO L225 Difference]: With dead ends: 590 [2021-08-12 19:02:33,195 INFO L226 Difference]: Without dead ends: 579 [2021-08-12 19:02:33,196 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-12 19:02:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-08-12 19:02:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-08-12 19:02:33,409 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-08-12 19:02:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:33,410 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-08-12 19:02:33,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-08-12 19:02:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:33,410 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:33,410 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:33,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10260,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:33,611 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-08-12 19:02:33,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:33,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157611385] [2021-08-12 19:02:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:33,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:33,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157611385] [2021-08-12 19:02:33,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157611385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:33,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925104831] [2021-08-12 19:02:33,661 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:33,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:02:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:33,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925104831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:33,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:33,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:02:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005639125] [2021-08-12 19:02:33,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:02:33,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:33,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:02:33,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:02:33,719 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:36,948 INFO L93 Difference]: Finished difference Result 604 states and 1634 transitions. [2021-08-12 19:02:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:02:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:36,950 INFO L225 Difference]: With dead ends: 604 [2021-08-12 19:02:36,950 INFO L226 Difference]: Without dead ends: 595 [2021-08-12 19:02:36,950 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:02:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-12 19:02:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-08-12 19:02:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-08-12 19:02:37,172 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-08-12 19:02:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:37,172 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-08-12 19:02:37,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-08-12 19:02:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:37,173 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:37,173 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:37,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:37,389 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-08-12 19:02:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:37,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921591914] [2021-08-12 19:02:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:37,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:37,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921591914] [2021-08-12 19:02:37,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921591914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:37,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807006165] [2021-08-12 19:02:37,426 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:37,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:02:37,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:37,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:37,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807006165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:37,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:37,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:02:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675775530] [2021-08-12 19:02:37,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:02:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:37,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:02:37,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:02:37,485 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:02:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:41,606 INFO L93 Difference]: Finished difference Result 640 states and 1695 transitions. [2021-08-12 19:02:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:02:41,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:02:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:41,608 INFO L225 Difference]: With dead ends: 640 [2021-08-12 19:02:41,608 INFO L226 Difference]: Without dead ends: 631 [2021-08-12 19:02:41,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:02:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-12 19:02:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-08-12 19:02:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-08-12 19:02:41,835 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-08-12 19:02:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:41,835 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-08-12 19:02:41,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:02:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-08-12 19:02:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:41,836 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:41,836 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10262,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:42,037 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-08-12 19:02:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704901091] [2021-08-12 19:02:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:42,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704901091] [2021-08-12 19:02:42,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704901091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197398633] [2021-08-12 19:02:42,087 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:42,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:02:42,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:42,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:42,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197398633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:42,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:42,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:02:42,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598953976] [2021-08-12 19:02:42,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:42,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:42,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:42,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:42,140 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:44,077 INFO L93 Difference]: Finished difference Result 587 states and 1677 transitions. [2021-08-12 19:02:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:02:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:44,078 INFO L225 Difference]: With dead ends: 587 [2021-08-12 19:02:44,078 INFO L226 Difference]: Without dead ends: 570 [2021-08-12 19:02:44,079 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:02:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-12 19:02:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-08-12 19:02:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-08-12 19:02:44,300 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-08-12 19:02:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:44,300 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-08-12 19:02:44,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-08-12 19:02:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:44,300 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:44,300 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:44,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10263 [2021-08-12 19:02:44,501 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:44,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-08-12 19:02:44,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:44,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601300516] [2021-08-12 19:02:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:44,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601300516] [2021-08-12 19:02:44,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601300516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783956021] [2021-08-12 19:02:44,543 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:44,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:44,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783956021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:44,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:44,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:02:44,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261795217] [2021-08-12 19:02:44,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:44,594 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:49,433 INFO L93 Difference]: Finished difference Result 687 states and 1790 transitions. [2021-08-12 19:02:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:02:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:49,435 INFO L225 Difference]: With dead ends: 687 [2021-08-12 19:02:49,435 INFO L226 Difference]: Without dead ends: 678 [2021-08-12 19:02:49,435 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:02:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-12 19:02:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-08-12 19:02:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-08-12 19:02:49,654 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-08-12 19:02:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:49,654 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-08-12 19:02:49,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-08-12 19:02:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:49,655 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:49,655 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:49,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10264 [2021-08-12 19:02:49,855 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-08-12 19:02:49,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:49,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880431324] [2021-08-12 19:02:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880431324] [2021-08-12 19:02:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880431324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571083750] [2021-08-12 19:02:49,901 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:49,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:02:49,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:49,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571083750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:49,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:49,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:02:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212908842] [2021-08-12 19:02:49,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:02:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:02:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:02:49,964 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:52,210 INFO L93 Difference]: Finished difference Result 615 states and 1728 transitions. [2021-08-12 19:02:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:02:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:52,212 INFO L225 Difference]: With dead ends: 615 [2021-08-12 19:02:52,212 INFO L226 Difference]: Without dead ends: 596 [2021-08-12 19:02:52,212 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:02:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-12 19:02:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-08-12 19:02:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-08-12 19:02:52,470 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-08-12 19:02:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:52,470 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-08-12 19:02:52,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-08-12 19:02:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:52,471 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:52,471 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:52,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10265,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:52,671 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:52,672 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-08-12 19:02:52,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:52,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629440274] [2021-08-12 19:02:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:52,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:52,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629440274] [2021-08-12 19:02:52,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629440274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:52,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844288223] [2021-08-12 19:02:52,718 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:02:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:52,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844288223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:52,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:52,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:02:52,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777121005] [2021-08-12 19:02:52,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:02:52,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:02:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:02:52,778 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:58,371 INFO L93 Difference]: Finished difference Result 750 states and 1939 transitions. [2021-08-12 19:02:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:02:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:02:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:58,377 INFO L225 Difference]: With dead ends: 750 [2021-08-12 19:02:58,377 INFO L226 Difference]: Without dead ends: 741 [2021-08-12 19:02:58,377 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:02:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-12 19:02:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-08-12 19:02:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-08-12 19:02:58,654 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-08-12 19:02:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:58,654 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-08-12 19:02:58,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-08-12 19:02:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:02:58,655 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:58,655 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:58,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10266 [2021-08-12 19:02:58,855 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:58,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-08-12 19:02:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:58,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418684442] [2021-08-12 19:02:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:58,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418684442] [2021-08-12 19:02:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418684442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118766287] [2021-08-12 19:02:58,889 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:58,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:02:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:02:58,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118766287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:58,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:58,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:02:58,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107947340] [2021-08-12 19:02:58,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:02:58,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:58,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:02:58,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:02:58,940 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:01,315 INFO L93 Difference]: Finished difference Result 667 states and 1860 transitions. [2021-08-12 19:03:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:03:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:01,317 INFO L225 Difference]: With dead ends: 667 [2021-08-12 19:03:01,317 INFO L226 Difference]: Without dead ends: 658 [2021-08-12 19:03:01,317 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-08-12 19:03:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-08-12 19:03:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-08-12 19:03:01,579 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-08-12 19:03:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:01,579 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-08-12 19:03:01,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-08-12 19:03:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:01,580 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:01,580 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:01,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10267 [2021-08-12 19:03:01,781 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-08-12 19:03:01,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:01,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033039537] [2021-08-12 19:03:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:01,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:01,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033039537] [2021-08-12 19:03:01,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033039537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:01,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932427866] [2021-08-12 19:03:01,812 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:01,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:03:01,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:01,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:03:01,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932427866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:01,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:01,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:03:01,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214980229] [2021-08-12 19:03:01,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:03:01,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:01,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:03:01,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:01,861 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:05,075 INFO L93 Difference]: Finished difference Result 677 states and 1860 transitions. [2021-08-12 19:03:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:03:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:05,077 INFO L225 Difference]: With dead ends: 677 [2021-08-12 19:03:05,078 INFO L226 Difference]: Without dead ends: 666 [2021-08-12 19:03:05,078 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:03:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-08-12 19:03:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-08-12 19:03:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-08-12 19:03:05,338 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-08-12 19:03:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:05,338 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-08-12 19:03:05,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-08-12 19:03:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:05,339 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:05,339 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:05,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10268 [2021-08-12 19:03:05,539 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-08-12 19:03:05,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:05,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710681237] [2021-08-12 19:03:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:05,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:05,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710681237] [2021-08-12 19:03:05,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710681237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:05,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447397193] [2021-08-12 19:03:05,571 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:05,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:03:05,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:03:05,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447397193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:05,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:05,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:03:05,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578835100] [2021-08-12 19:03:05,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:03:05,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:05,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:03:05,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:05,621 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:07,940 INFO L93 Difference]: Finished difference Result 673 states and 1902 transitions. [2021-08-12 19:03:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:03:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:07,943 INFO L225 Difference]: With dead ends: 673 [2021-08-12 19:03:07,943 INFO L226 Difference]: Without dead ends: 662 [2021-08-12 19:03:07,943 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:03:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-08-12 19:03:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-08-12 19:03:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-08-12 19:03:08,208 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-08-12 19:03:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:08,208 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-08-12 19:03:08,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-08-12 19:03:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:08,209 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:08,209 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:08,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10269,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:08,410 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:08,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-08-12 19:03:08,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:08,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179109648] [2021-08-12 19:03:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:08,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179109648] [2021-08-12 19:03:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179109648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123498950] [2021-08-12 19:03:08,439 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:03:08,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123498950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:08,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:08,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:03:08,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859989893] [2021-08-12 19:03:08,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:03:08,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:03:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:03:08,491 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:11,590 INFO L93 Difference]: Finished difference Result 666 states and 1845 transitions. [2021-08-12 19:03:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:03:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:11,592 INFO L225 Difference]: With dead ends: 666 [2021-08-12 19:03:11,592 INFO L226 Difference]: Without dead ends: 657 [2021-08-12 19:03:11,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:03:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-12 19:03:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-08-12 19:03:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-08-12 19:03:11,854 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-08-12 19:03:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:11,854 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-08-12 19:03:11,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-08-12 19:03:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:11,855 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:11,855 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:12,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10270 [2021-08-12 19:03:12,078 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-08-12 19:03:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:12,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105022590] [2021-08-12 19:03:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:12,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:12,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105022590] [2021-08-12 19:03:12,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105022590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:12,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618134912] [2021-08-12 19:03:12,114 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:12,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:03:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:12,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618134912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:12,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:03:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165701946] [2021-08-12 19:03:12,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:12,171 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:15,889 INFO L93 Difference]: Finished difference Result 663 states and 1837 transitions. [2021-08-12 19:03:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:03:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:03:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:15,891 INFO L225 Difference]: With dead ends: 663 [2021-08-12 19:03:15,891 INFO L226 Difference]: Without dead ends: 654 [2021-08-12 19:03:15,891 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:03:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-08-12 19:03:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-08-12 19:03:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-08-12 19:03:16,149 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-08-12 19:03:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:16,149 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-08-12 19:03:16,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-08-12 19:03:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:16,150 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:16,150 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:16,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10271,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:16,351 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:16,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-08-12 19:03:16,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:16,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934431100] [2021-08-12 19:03:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:16,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:16,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934431100] [2021-08-12 19:03:16,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934431100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:16,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645112640] [2021-08-12 19:03:16,394 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:16,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:03:16,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:16,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:16,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:16,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645112640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:16,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:16,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:03:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686435798] [2021-08-12 19:03:16,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:03:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:03:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:03:16,444 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:18,723 INFO L93 Difference]: Finished difference Result 687 states and 1988 transitions. [2021-08-12 19:03:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:03:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:18,725 INFO L225 Difference]: With dead ends: 687 [2021-08-12 19:03:18,725 INFO L226 Difference]: Without dead ends: 670 [2021-08-12 19:03:18,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:03:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-08-12 19:03:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-08-12 19:03:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-08-12 19:03:18,987 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-08-12 19:03:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:18,987 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-08-12 19:03:18,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-08-12 19:03:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:18,988 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:18,988 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:19,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10272,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:19,188 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-08-12 19:03:19,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:19,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933171531] [2021-08-12 19:03:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:19,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:19,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933171531] [2021-08-12 19:03:19,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933171531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:19,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882564150] [2021-08-12 19:03:19,231 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:19,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:03:19,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:19,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:19,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882564150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:19,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:19,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:03:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237308668] [2021-08-12 19:03:19,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:03:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:03:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:03:19,297 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:23,980 INFO L93 Difference]: Finished difference Result 726 states and 1991 transitions. [2021-08-12 19:03:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:03:23,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:23,982 INFO L225 Difference]: With dead ends: 726 [2021-08-12 19:03:23,982 INFO L226 Difference]: Without dead ends: 717 [2021-08-12 19:03:23,983 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:03:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-08-12 19:03:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-08-12 19:03:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-08-12 19:03:24,246 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-08-12 19:03:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:24,246 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-08-12 19:03:24,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-08-12 19:03:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:24,247 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:24,247 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:24,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10273,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:24,447 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-08-12 19:03:24,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:24,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317406373] [2021-08-12 19:03:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:24,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:24,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317406373] [2021-08-12 19:03:24,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317406373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:24,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038693117] [2021-08-12 19:03:24,491 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:24,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:03:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038693117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:24,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:24,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:03:24,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031452875] [2021-08-12 19:03:24,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:03:24,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:24,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:03:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:03:24,564 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:27,094 INFO L93 Difference]: Finished difference Result 713 states and 2040 transitions. [2021-08-12 19:03:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:03:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:27,097 INFO L225 Difference]: With dead ends: 713 [2021-08-12 19:03:27,097 INFO L226 Difference]: Without dead ends: 694 [2021-08-12 19:03:27,097 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:03:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-12 19:03:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-08-12 19:03:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-08-12 19:03:27,364 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-08-12 19:03:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:27,365 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-08-12 19:03:27,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-08-12 19:03:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:27,365 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:27,365 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:27,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10274,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:27,566 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:27,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-08-12 19:03:27,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:27,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741458112] [2021-08-12 19:03:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:27,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:27,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741458112] [2021-08-12 19:03:27,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741458112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:27,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809189907] [2021-08-12 19:03:27,609 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:27,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:03:27,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:27,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:27,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809189907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:27,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:27,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:03:27,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462613363] [2021-08-12 19:03:27,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:03:27,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:03:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:03:27,696 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:33,116 INFO L93 Difference]: Finished difference Result 772 states and 2088 transitions. [2021-08-12 19:03:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:03:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:33,118 INFO L225 Difference]: With dead ends: 772 [2021-08-12 19:03:33,118 INFO L226 Difference]: Without dead ends: 763 [2021-08-12 19:03:33,118 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:03:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-08-12 19:03:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-08-12 19:03:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-08-12 19:03:33,395 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-08-12 19:03:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:33,395 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-08-12 19:03:33,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-08-12 19:03:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:33,397 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:33,397 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:33,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10275 [2021-08-12 19:03:33,597 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-08-12 19:03:33,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:33,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284929763] [2021-08-12 19:03:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:33,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:33,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284929763] [2021-08-12 19:03:33,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284929763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:33,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227488450] [2021-08-12 19:03:33,656 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:33,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227488450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:33,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:33,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:03:33,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9815021] [2021-08-12 19:03:33,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:03:33,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:03:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:03:33,708 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:35,366 INFO L93 Difference]: Finished difference Result 619 states and 1832 transitions. [2021-08-12 19:03:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:03:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:35,369 INFO L225 Difference]: With dead ends: 619 [2021-08-12 19:03:35,369 INFO L226 Difference]: Without dead ends: 598 [2021-08-12 19:03:35,369 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:03:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-08-12 19:03:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-08-12 19:03:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-08-12 19:03:35,664 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-08-12 19:03:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:35,664 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-08-12 19:03:35,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-08-12 19:03:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:35,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:35,665 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:35,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10276 [2021-08-12 19:03:35,865 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-08-12 19:03:35,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:35,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80136976] [2021-08-12 19:03:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:35,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:35,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80136976] [2021-08-12 19:03:35,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80136976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:35,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442619971] [2021-08-12 19:03:35,909 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:35,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:03:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:35,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442619971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:35,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:35,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:03:35,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889453035] [2021-08-12 19:03:35,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:03:35,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:35,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:03:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:03:35,965 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:41,822 INFO L93 Difference]: Finished difference Result 864 states and 2371 transitions. [2021-08-12 19:03:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:03:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:03:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:41,824 INFO L225 Difference]: With dead ends: 864 [2021-08-12 19:03:41,824 INFO L226 Difference]: Without dead ends: 855 [2021-08-12 19:03:41,824 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:03:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-08-12 19:03:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-08-12 19:03:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-08-12 19:03:42,140 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-08-12 19:03:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:42,140 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-08-12 19:03:42,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-08-12 19:03:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:42,141 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:42,141 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:42,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10277 [2021-08-12 19:03:42,343 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-08-12 19:03:42,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:42,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021016587] [2021-08-12 19:03:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:42,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:42,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021016587] [2021-08-12 19:03:42,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021016587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647002591] [2021-08-12 19:03:42,381 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:42,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:03:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:42,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647002591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:42,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:42,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:03:42,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493904004] [2021-08-12 19:03:42,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:42,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:42,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:42,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:42,439 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:45,317 INFO L93 Difference]: Finished difference Result 826 states and 2355 transitions. [2021-08-12 19:03:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:03:45,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:03:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:45,319 INFO L225 Difference]: With dead ends: 826 [2021-08-12 19:03:45,319 INFO L226 Difference]: Without dead ends: 817 [2021-08-12 19:03:45,320 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:03:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-12 19:03:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-08-12 19:03:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-08-12 19:03:45,664 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-08-12 19:03:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:45,664 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-08-12 19:03:45,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-08-12 19:03:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:45,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:45,665 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:45,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10278 [2021-08-12 19:03:45,866 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-08-12 19:03:45,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:45,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445059765] [2021-08-12 19:03:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:45,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:45,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445059765] [2021-08-12 19:03:45,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445059765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:45,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456085898] [2021-08-12 19:03:45,900 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:45,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:03:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:45,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:45,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:45,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456085898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:45,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:45,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:03:45,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144741591] [2021-08-12 19:03:45,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:45,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:45,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:45,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:45,953 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:49,663 INFO L93 Difference]: Finished difference Result 829 states and 2347 transitions. [2021-08-12 19:03:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:03:49,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:03:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:49,665 INFO L225 Difference]: With dead ends: 829 [2021-08-12 19:03:49,665 INFO L226 Difference]: Without dead ends: 818 [2021-08-12 19:03:49,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:03:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-12 19:03:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-08-12 19:03:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 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) [2021-08-12 19:03:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-08-12 19:03:49,955 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-08-12 19:03:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:49,955 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-08-12 19:03:49,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-08-12 19:03:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:49,956 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:49,956 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:50,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10279,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:50,156 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-08-12 19:03:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:50,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053464088] [2021-08-12 19:03:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:50,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:50,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053464088] [2021-08-12 19:03:50,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053464088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:50,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126761080] [2021-08-12 19:03:50,193 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:50,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:03:50,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:50,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126761080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:03:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651721308] [2021-08-12 19:03:50,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:50,243 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:53,022 INFO L93 Difference]: Finished difference Result 831 states and 2397 transitions. [2021-08-12 19:03:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:03:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:03:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:53,025 INFO L225 Difference]: With dead ends: 831 [2021-08-12 19:03:53,025 INFO L226 Difference]: Without dead ends: 820 [2021-08-12 19:03:53,025 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:03:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-08-12 19:03:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-08-12 19:03:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-08-12 19:03:53,318 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-08-12 19:03:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:53,318 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-08-12 19:03:53,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-08-12 19:03:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:53,319 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:53,319 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:53,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10280,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:53,519 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-08-12 19:03:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:53,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187120086] [2021-08-12 19:03:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:53,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187120086] [2021-08-12 19:03:53,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187120086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762294762] [2021-08-12 19:03:53,555 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:53,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:03:53,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:03:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:53,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762294762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:53,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:53,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:03:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135406319] [2021-08-12 19:03:53,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:53,610 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:03:57,218 INFO L93 Difference]: Finished difference Result 806 states and 2276 transitions. [2021-08-12 19:03:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:03:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:03:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:03:57,221 INFO L225 Difference]: With dead ends: 806 [2021-08-12 19:03:57,221 INFO L226 Difference]: Without dead ends: 797 [2021-08-12 19:03:57,221 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:03:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-08-12 19:03:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-08-12 19:03:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:03:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-08-12 19:03:57,527 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-08-12 19:03:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:03:57,527 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-08-12 19:03:57,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:03:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-08-12 19:03:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:03:57,528 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:03:57,528 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:03:57,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10281,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:57,729 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:03:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:03:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-08-12 19:03:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:03:57,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362608190] [2021-08-12 19:03:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:03:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:03:57,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:03:57,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362608190] [2021-08-12 19:03:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362608190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604671344] [2021-08-12 19:03:57,765 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:03:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:03:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:03:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:03:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:03:57,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604671344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:03:57,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:03:57,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:03:57,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892275920] [2021-08-12 19:03:57,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:03:57,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:03:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:03:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:03:57,813 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:04:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:00,513 INFO L93 Difference]: Finished difference Result 804 states and 2330 transitions. [2021-08-12 19:04:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:04:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:04:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:00,516 INFO L225 Difference]: With dead ends: 804 [2021-08-12 19:04:00,516 INFO L226 Difference]: Without dead ends: 791 [2021-08-12 19:04:00,516 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:04:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-12 19:04:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-08-12 19:04:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-08-12 19:04:00,810 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-08-12 19:04:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:00,811 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-08-12 19:04:00,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:04:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-08-12 19:04:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:00,811 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:00,811 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:01,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10282,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:01,012 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-08-12 19:04:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:01,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297298987] [2021-08-12 19:04:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:01,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:01,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297298987] [2021-08-12 19:04:01,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297298987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:01,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779813160] [2021-08-12 19:04:01,046 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:01,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:01,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:04:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779813160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:01,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:01,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-12 19:04:01,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846846452] [2021-08-12 19:04:01,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:04:01,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:04:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:04:01,097 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:04:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:04,621 INFO L93 Difference]: Finished difference Result 768 states and 2187 transitions. [2021-08-12 19:04:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:04:04,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2021-08-12 19:04:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:04,623 INFO L225 Difference]: With dead ends: 768 [2021-08-12 19:04:04,623 INFO L226 Difference]: Without dead ends: 759 [2021-08-12 19:04:04,623 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:04:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-08-12 19:04:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-08-12 19:04:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-08-12 19:04:04,902 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-08-12 19:04:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:04,902 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-08-12 19:04:04,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-12 19:04:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-08-12 19:04:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:04,903 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:04,903 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:05,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10283,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:05,104 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-08-12 19:04:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:05,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2933436] [2021-08-12 19:04:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:05,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:05,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2933436] [2021-08-12 19:04:05,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2933436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:05,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985664948] [2021-08-12 19:04:05,146 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:05,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:04:05,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:05,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985664948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:05,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:05,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143637413] [2021-08-12 19:04:05,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:05,206 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:07,622 INFO L93 Difference]: Finished difference Result 722 states and 2106 transitions. [2021-08-12 19:04:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:04:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:07,624 INFO L225 Difference]: With dead ends: 722 [2021-08-12 19:04:07,624 INFO L226 Difference]: Without dead ends: 705 [2021-08-12 19:04:07,625 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:04:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-12 19:04:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-08-12 19:04:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-08-12 19:04:07,904 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-08-12 19:04:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:07,904 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-08-12 19:04:07,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-08-12 19:04:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:07,905 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:07,905 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:08,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10284 [2021-08-12 19:04:08,106 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-08-12 19:04:08,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:08,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312173060] [2021-08-12 19:04:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:08,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:08,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312173060] [2021-08-12 19:04:08,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312173060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:08,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120114475] [2021-08-12 19:04:08,146 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:08,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:04:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:08,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120114475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:08,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:08,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:08,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557237840] [2021-08-12 19:04:08,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:08,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:08,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:08,205 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:12,234 INFO L93 Difference]: Finished difference Result 757 states and 2173 transitions. [2021-08-12 19:04:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:04:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:12,237 INFO L225 Difference]: With dead ends: 757 [2021-08-12 19:04:12,237 INFO L226 Difference]: Without dead ends: 748 [2021-08-12 19:04:12,237 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:04:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-08-12 19:04:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-08-12 19:04:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-08-12 19:04:12,567 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-08-12 19:04:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:12,567 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-08-12 19:04:12,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-08-12 19:04:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:12,568 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:12,568 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:12,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10285,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:12,769 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-08-12 19:04:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:12,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308578167] [2021-08-12 19:04:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:12,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:12,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308578167] [2021-08-12 19:04:12,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308578167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:12,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998351084] [2021-08-12 19:04:12,813 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:12,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:04:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998351084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:12,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:12,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:04:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901200957] [2021-08-12 19:04:12,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:12,868 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:15,635 INFO L93 Difference]: Finished difference Result 781 states and 2250 transitions. [2021-08-12 19:04:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:04:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:15,637 INFO L225 Difference]: With dead ends: 781 [2021-08-12 19:04:15,637 INFO L226 Difference]: Without dead ends: 762 [2021-08-12 19:04:15,637 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:04:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-12 19:04:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-08-12 19:04:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-08-12 19:04:15,935 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-08-12 19:04:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:15,935 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-08-12 19:04:15,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-08-12 19:04:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:15,936 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:15,936 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:16,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10286 [2021-08-12 19:04:16,137 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-08-12 19:04:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:16,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227281875] [2021-08-12 19:04:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:16,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:16,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227281875] [2021-08-12 19:04:16,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227281875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:16,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389205661] [2021-08-12 19:04:16,179 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:16,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:04:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:16,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389205661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:16,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:16,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:04:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347249089] [2021-08-12 19:04:16,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:16,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:16,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:16,238 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:21,081 INFO L93 Difference]: Finished difference Result 773 states and 2170 transitions. [2021-08-12 19:04:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:04:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:21,083 INFO L225 Difference]: With dead ends: 773 [2021-08-12 19:04:21,083 INFO L226 Difference]: Without dead ends: 764 [2021-08-12 19:04:21,084 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:04:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-08-12 19:04:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-08-12 19:04:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-08-12 19:04:21,375 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-08-12 19:04:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:21,375 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-08-12 19:04:21,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-08-12 19:04:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:21,376 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:21,376 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:21,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10287 [2021-08-12 19:04:21,577 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-08-12 19:04:21,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:21,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486491980] [2021-08-12 19:04:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:21,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486491980] [2021-08-12 19:04:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486491980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582822521] [2021-08-12 19:04:21,624 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:21,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582822521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:21,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:21,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:04:21,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23734228] [2021-08-12 19:04:21,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:21,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:21,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:21,679 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:23,527 INFO L93 Difference]: Finished difference Result 686 states and 2053 transitions. [2021-08-12 19:04:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:04:23,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:23,529 INFO L225 Difference]: With dead ends: 686 [2021-08-12 19:04:23,529 INFO L226 Difference]: Without dead ends: 665 [2021-08-12 19:04:23,530 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:04:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-12 19:04:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-08-12 19:04:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-08-12 19:04:23,864 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-08-12 19:04:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:23,864 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-08-12 19:04:23,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-08-12 19:04:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:23,865 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:23,865 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:24,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-08-12 19:04:24,069 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-08-12 19:04:24,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:24,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890946706] [2021-08-12 19:04:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:24,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890946706] [2021-08-12 19:04:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890946706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640138897] [2021-08-12 19:04:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:24,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:24,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:24,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640138897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:24,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:24,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:04:24,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781951828] [2021-08-12 19:04:24,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:24,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:24,200 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:29,037 INFO L93 Difference]: Finished difference Result 751 states and 2125 transitions. [2021-08-12 19:04:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:04:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:29,039 INFO L225 Difference]: With dead ends: 751 [2021-08-12 19:04:29,039 INFO L226 Difference]: Without dead ends: 742 [2021-08-12 19:04:29,040 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:04:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-08-12 19:04:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-08-12 19:04:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-08-12 19:04:29,331 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-08-12 19:04:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:29,331 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-08-12 19:04:29,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-08-12 19:04:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:29,332 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:29,332 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:29,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10289 [2021-08-12 19:04:29,532 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-08-12 19:04:29,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:29,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214558049] [2021-08-12 19:04:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:29,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214558049] [2021-08-12 19:04:29,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214558049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591419924] [2021-08-12 19:04:29,584 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:29,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:04:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:29,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591419924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:29,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:29,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:04:29,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757312997] [2021-08-12 19:04:29,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:29,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:29,646 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:31,529 INFO L93 Difference]: Finished difference Result 680 states and 2034 transitions. [2021-08-12 19:04:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:04:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:31,532 INFO L225 Difference]: With dead ends: 680 [2021-08-12 19:04:31,532 INFO L226 Difference]: Without dead ends: 657 [2021-08-12 19:04:31,532 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:04:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-12 19:04:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-08-12 19:04:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-08-12 19:04:31,819 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-08-12 19:04:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:31,819 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-08-12 19:04:31,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-08-12 19:04:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:31,819 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:31,820 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:32,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10290,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:32,020 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-08-12 19:04:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757084404] [2021-08-12 19:04:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:32,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:32,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757084404] [2021-08-12 19:04:32,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757084404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:32,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198789128] [2021-08-12 19:04:32,067 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:32,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:04:32,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:32,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198789128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:32,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:32,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:04:32,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233304358] [2021-08-12 19:04:32,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:32,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:32,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:32,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:32,125 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:38,133 INFO L93 Difference]: Finished difference Result 837 states and 2343 transitions. [2021-08-12 19:04:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:04:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:38,136 INFO L225 Difference]: With dead ends: 837 [2021-08-12 19:04:38,136 INFO L226 Difference]: Without dead ends: 828 [2021-08-12 19:04:38,136 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:04:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-12 19:04:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-08-12 19:04:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-08-12 19:04:38,439 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-08-12 19:04:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:38,440 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-08-12 19:04:38,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-08-12 19:04:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:38,440 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:38,440 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:38,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10291,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:38,641 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-08-12 19:04:38,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:38,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138851800] [2021-08-12 19:04:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:38,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:38,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138851800] [2021-08-12 19:04:38,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138851800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:38,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545128857] [2021-08-12 19:04:38,685 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:38,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:04:38,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:38,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:38,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545128857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:38,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:38,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:38,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837671398] [2021-08-12 19:04:38,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:38,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:38,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:38,744 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:42,047 INFO L93 Difference]: Finished difference Result 878 states and 2489 transitions. [2021-08-12 19:04:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:04:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:42,049 INFO L225 Difference]: With dead ends: 878 [2021-08-12 19:04:42,049 INFO L226 Difference]: Without dead ends: 869 [2021-08-12 19:04:42,050 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-08-12 19:04:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-08-12 19:04:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-08-12 19:04:42,366 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-08-12 19:04:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:42,366 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-08-12 19:04:42,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-08-12 19:04:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:42,367 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:42,367 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:42,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10292 [2021-08-12 19:04:42,568 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-08-12 19:04:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:42,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149013523] [2021-08-12 19:04:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:42,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149013523] [2021-08-12 19:04:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149013523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923934049] [2021-08-12 19:04:42,617 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:42,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:04:42,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:42,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:42,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923934049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:42,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:42,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:42,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007658339] [2021-08-12 19:04:42,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:42,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:42,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:42,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:42,666 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:46,836 INFO L93 Difference]: Finished difference Result 887 states and 2521 transitions. [2021-08-12 19:04:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:04:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:46,838 INFO L225 Difference]: With dead ends: 887 [2021-08-12 19:04:46,839 INFO L226 Difference]: Without dead ends: 876 [2021-08-12 19:04:46,839 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:04:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-08-12 19:04:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-08-12 19:04:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-08-12 19:04:47,157 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-08-12 19:04:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:47,157 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-08-12 19:04:47,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-08-12 19:04:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:47,158 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:47,158 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:47,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10293,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:47,358 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-08-12 19:04:47,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:47,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296821435] [2021-08-12 19:04:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:47,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296821435] [2021-08-12 19:04:47,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296821435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770616763] [2021-08-12 19:04:47,401 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:47,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770616763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:47,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:47,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:47,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326126210] [2021-08-12 19:04:47,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:47,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:47,448 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:50,736 INFO L93 Difference]: Finished difference Result 885 states and 2539 transitions. [2021-08-12 19:04:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:04:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:50,738 INFO L225 Difference]: With dead ends: 885 [2021-08-12 19:04:50,738 INFO L226 Difference]: Without dead ends: 874 [2021-08-12 19:04:50,739 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:04:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-12 19:04:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-08-12 19:04:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-08-12 19:04:51,052 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-08-12 19:04:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:51,052 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-08-12 19:04:51,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-08-12 19:04:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:51,053 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:51,053 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:51,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10294,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:51,253 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-08-12 19:04:51,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:51,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98243496] [2021-08-12 19:04:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:51,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98243496] [2021-08-12 19:04:51,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98243496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210287920] [2021-08-12 19:04:51,307 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:51,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:51,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:51,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210287920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:51,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:51,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:51,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695774422] [2021-08-12 19:04:51,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:51,362 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:55,461 INFO L93 Difference]: Finished difference Result 877 states and 2488 transitions. [2021-08-12 19:04:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:04:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:55,463 INFO L225 Difference]: With dead ends: 877 [2021-08-12 19:04:55,463 INFO L226 Difference]: Without dead ends: 868 [2021-08-12 19:04:55,464 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:04:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-08-12 19:04:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-08-12 19:04:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-08-12 19:04:55,770 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-08-12 19:04:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:55,770 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-08-12 19:04:55,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-08-12 19:04:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:55,771 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:55,771 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:55,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10295,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:55,972 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-08-12 19:04:55,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:55,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212867132] [2021-08-12 19:04:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:56,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:56,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212867132] [2021-08-12 19:04:56,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212867132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:56,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490686862] [2021-08-12 19:04:56,012 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:56,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:04:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:04:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490686862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:56,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:56,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:04:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91550845] [2021-08-12 19:04:56,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:04:56,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:04:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:56,071 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:59,512 INFO L93 Difference]: Finished difference Result 914 states and 2638 transitions. [2021-08-12 19:04:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:04:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:04:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:59,515 INFO L225 Difference]: With dead ends: 914 [2021-08-12 19:04:59,515 INFO L226 Difference]: Without dead ends: 901 [2021-08-12 19:04:59,515 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:04:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-08-12 19:04:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-08-12 19:04:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-08-12 19:04:59,831 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-08-12 19:04:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:59,831 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-08-12 19:04:59,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-08-12 19:04:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:04:59,832 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:59,832 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:00,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10296 [2021-08-12 19:05:00,033 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:00,033 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-08-12 19:05:00,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:00,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592845921] [2021-08-12 19:05:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:00,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592845921] [2021-08-12 19:05:00,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592845921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132296356] [2021-08-12 19:05:00,080 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:00,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:05:00,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:00,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132296356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:00,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:00,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:05:00,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461684022] [2021-08-12 19:05:00,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:05:00,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:05:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:05:00,145 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:04,644 INFO L93 Difference]: Finished difference Result 867 states and 2483 transitions. [2021-08-12 19:05:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:05:04,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:04,647 INFO L225 Difference]: With dead ends: 867 [2021-08-12 19:05:04,647 INFO L226 Difference]: Without dead ends: 858 [2021-08-12 19:05:04,647 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:05:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-08-12 19:05:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-08-12 19:05:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-08-12 19:05:05,007 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-08-12 19:05:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:05,007 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-08-12 19:05:05,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-08-12 19:05:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:05,008 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:05,008 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:05,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10297 [2021-08-12 19:05:05,208 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-08-12 19:05:05,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:05,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784664818] [2021-08-12 19:05:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:05,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784664818] [2021-08-12 19:05:05,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784664818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335915354] [2021-08-12 19:05:05,250 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:05,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:05:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:05,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335915354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:05,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:05,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:05:05,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326230551] [2021-08-12 19:05:05,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:05:05,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:05,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:05:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:05:05,298 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:09,000 INFO L93 Difference]: Finished difference Result 945 states and 2769 transitions. [2021-08-12 19:05:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:05:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:09,002 INFO L225 Difference]: With dead ends: 945 [2021-08-12 19:05:09,002 INFO L226 Difference]: Without dead ends: 930 [2021-08-12 19:05:09,003 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:05:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-12 19:05:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-08-12 19:05:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-08-12 19:05:09,325 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-08-12 19:05:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:09,325 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-08-12 19:05:09,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-08-12 19:05:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:09,326 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:09,326 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:09,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10298,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:09,541 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-08-12 19:05:09,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:09,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804284977] [2021-08-12 19:05:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:09,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:09,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804284977] [2021-08-12 19:05:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804284977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:09,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913607086] [2021-08-12 19:05:09,588 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:09,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:05:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:09,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913607086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:09,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:09,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:05:09,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358060914] [2021-08-12 19:05:09,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:05:09,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:05:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:05:09,653 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:13,689 INFO L93 Difference]: Finished difference Result 844 states and 2478 transitions. [2021-08-12 19:05:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:05:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:13,692 INFO L225 Difference]: With dead ends: 844 [2021-08-12 19:05:13,692 INFO L226 Difference]: Without dead ends: 835 [2021-08-12 19:05:13,692 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:05:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-08-12 19:05:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-08-12 19:05:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-08-12 19:05:14,044 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-08-12 19:05:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:14,045 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-08-12 19:05:14,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-08-12 19:05:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:14,045 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:14,045 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:14,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10299 [2021-08-12 19:05:14,246 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-08-12 19:05:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:14,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450115087] [2021-08-12 19:05:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:14,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:14,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450115087] [2021-08-12 19:05:14,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450115087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:14,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9611393] [2021-08-12 19:05:14,303 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:14,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:05:14,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9611393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:14,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:14,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:05:14,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140911616] [2021-08-12 19:05:14,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:05:14,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:05:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:05:14,360 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:17,645 INFO L93 Difference]: Finished difference Result 923 states and 2711 transitions. [2021-08-12 19:05:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:05:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:17,648 INFO L225 Difference]: With dead ends: 923 [2021-08-12 19:05:17,648 INFO L226 Difference]: Without dead ends: 906 [2021-08-12 19:05:17,649 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:05:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-08-12 19:05:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-08-12 19:05:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-08-12 19:05:17,974 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-08-12 19:05:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:17,974 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-08-12 19:05:17,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-08-12 19:05:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:17,975 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:17,975 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:18,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10300 [2021-08-12 19:05:18,175 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-08-12 19:05:18,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:18,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608393695] [2021-08-12 19:05:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:18,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608393695] [2021-08-12 19:05:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608393695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965116228] [2021-08-12 19:05:18,223 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:18,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:05:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:05:18,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965116228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:18,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:18,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:05:18,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100574749] [2021-08-12 19:05:18,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:05:18,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:05:18,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:05:18,276 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:21,575 INFO L93 Difference]: Finished difference Result 821 states and 2487 transitions. [2021-08-12 19:05:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:05:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:21,577 INFO L225 Difference]: With dead ends: 821 [2021-08-12 19:05:21,577 INFO L226 Difference]: Without dead ends: 812 [2021-08-12 19:05:21,578 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:05:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-08-12 19:05:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-08-12 19:05:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-08-12 19:05:22,002 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-08-12 19:05:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-08-12 19:05:22,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-08-12 19:05:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:22,003 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:22,004 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:22,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10301 [2021-08-12 19:05:22,213 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-08-12 19:05:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764786593] [2021-08-12 19:05:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:22,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:22,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764786593] [2021-08-12 19:05:22,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764786593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:22,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891432255] [2021-08-12 19:05:22,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:22,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:05:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:22,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891432255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:22,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:22,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:22,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875004058] [2021-08-12 19:05:22,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:22,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:22,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:22,323 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:25,683 INFO L93 Difference]: Finished difference Result 939 states and 2778 transitions. [2021-08-12 19:05:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:05:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:25,686 INFO L225 Difference]: With dead ends: 939 [2021-08-12 19:05:25,686 INFO L226 Difference]: Without dead ends: 920 [2021-08-12 19:05:25,686 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:05:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-12 19:05:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-08-12 19:05:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 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) [2021-08-12 19:05:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-08-12 19:05:26,062 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-08-12 19:05:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:26,062 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-08-12 19:05:26,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-08-12 19:05:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:26,063 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:26,063 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:26,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10302,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:26,264 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-08-12 19:05:26,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:26,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949196415] [2021-08-12 19:05:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:26,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:26,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949196415] [2021-08-12 19:05:26,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949196415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:26,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002812920] [2021-08-12 19:05:26,314 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:26,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:05:26,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:26,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:26,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002812920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:26,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:26,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:26,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874422486] [2021-08-12 19:05:26,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:26,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:26,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:26,373 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:30,707 INFO L93 Difference]: Finished difference Result 879 states and 2623 transitions. [2021-08-12 19:05:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:05:30,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:30,710 INFO L225 Difference]: With dead ends: 879 [2021-08-12 19:05:30,710 INFO L226 Difference]: Without dead ends: 870 [2021-08-12 19:05:30,710 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:05:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-08-12 19:05:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-08-12 19:05:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-08-12 19:05:31,103 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-08-12 19:05:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:31,103 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-08-12 19:05:31,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-08-12 19:05:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:31,104 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:31,104 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:31,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10303 [2021-08-12 19:05:31,304 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-08-12 19:05:31,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:31,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740421613] [2021-08-12 19:05:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:31,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740421613] [2021-08-12 19:05:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740421613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659626516] [2021-08-12 19:05:31,349 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:31,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:05:31,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:31,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:31,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:31,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659626516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:31,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:31,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811595744] [2021-08-12 19:05:31,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:31,404 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:33,582 INFO L93 Difference]: Finished difference Result 862 states and 2634 transitions. [2021-08-12 19:05:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:05:33,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:33,585 INFO L225 Difference]: With dead ends: 862 [2021-08-12 19:05:33,585 INFO L226 Difference]: Without dead ends: 841 [2021-08-12 19:05:33,586 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:05:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-12 19:05:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-08-12 19:05:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-08-12 19:05:33,982 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-08-12 19:05:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:33,982 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-08-12 19:05:33,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-08-12 19:05:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:33,983 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:33,983 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:34,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10304,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:34,184 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-08-12 19:05:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:34,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684252551] [2021-08-12 19:05:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:34,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:34,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684252551] [2021-08-12 19:05:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684252551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502216196] [2021-08-12 19:05:34,235 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:34,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:05:34,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:34,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502216196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:34,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:34,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:34,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670808123] [2021-08-12 19:05:34,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:34,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:34,296 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:39,109 INFO L93 Difference]: Finished difference Result 884 states and 2640 transitions. [2021-08-12 19:05:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:05:39,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:39,112 INFO L225 Difference]: With dead ends: 884 [2021-08-12 19:05:39,112 INFO L226 Difference]: Without dead ends: 875 [2021-08-12 19:05:39,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:05:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-08-12 19:05:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-08-12 19:05:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-08-12 19:05:39,473 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-08-12 19:05:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:39,473 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-08-12 19:05:39,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-08-12 19:05:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:39,474 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:39,474 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:39,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10305,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:39,674 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-08-12 19:05:39,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:39,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801640247] [2021-08-12 19:05:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:39,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:39,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801640247] [2021-08-12 19:05:39,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801640247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:39,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758825884] [2021-08-12 19:05:39,720 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:39,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:39,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758825884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:39,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:39,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:39,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911204081] [2021-08-12 19:05:39,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:39,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:39,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:39,778 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:42,033 INFO L93 Difference]: Finished difference Result 857 states and 2621 transitions. [2021-08-12 19:05:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:05:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:42,035 INFO L225 Difference]: With dead ends: 857 [2021-08-12 19:05:42,035 INFO L226 Difference]: Without dead ends: 834 [2021-08-12 19:05:42,036 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:05:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-08-12 19:05:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-08-12 19:05:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-08-12 19:05:42,429 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-08-12 19:05:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:42,429 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-08-12 19:05:42,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-08-12 19:05:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:42,430 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:42,431 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:42,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10306 [2021-08-12 19:05:42,631 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-08-12 19:05:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:42,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153295338] [2021-08-12 19:05:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:42,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:42,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153295338] [2021-08-12 19:05:42,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153295338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:42,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759368438] [2021-08-12 19:05:42,687 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:42,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:05:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:42,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759368438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:42,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:42,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:42,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602619409] [2021-08-12 19:05:42,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:42,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:42,745 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:48,190 INFO L93 Difference]: Finished difference Result 930 states and 2753 transitions. [2021-08-12 19:05:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:05:48,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:48,193 INFO L225 Difference]: With dead ends: 930 [2021-08-12 19:05:48,193 INFO L226 Difference]: Without dead ends: 921 [2021-08-12 19:05:48,193 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:05:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-08-12 19:05:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-08-12 19:05:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-08-12 19:05:48,588 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-08-12 19:05:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:48,588 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-08-12 19:05:48,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-08-12 19:05:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:48,589 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:48,589 INFO L550 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:48,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10307,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:48,789 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-08-12 19:05:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:48,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644403195] [2021-08-12 19:05:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:48,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644403195] [2021-08-12 19:05:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644403195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967399467] [2021-08-12 19:05:48,842 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:48,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:05:48,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:48,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:48,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967399467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:48,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:48,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005609252] [2021-08-12 19:05:48,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:48,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:48,899 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:51,119 INFO L93 Difference]: Finished difference Result 855 states and 2617 transitions. [2021-08-12 19:05:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:05:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:51,122 INFO L225 Difference]: With dead ends: 855 [2021-08-12 19:05:51,122 INFO L226 Difference]: Without dead ends: 830 [2021-08-12 19:05:51,122 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:05:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-12 19:05:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-08-12 19:05:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-08-12 19:05:51,518 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-08-12 19:05:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:51,518 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-08-12 19:05:51,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-08-12 19:05:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:05:51,520 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:51,520 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:51,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10308 [2021-08-12 19:05:51,733 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-08-12 19:05:51,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:51,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337935431] [2021-08-12 19:05:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:51,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:51,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337935431] [2021-08-12 19:05:51,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337935431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:51,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335705909] [2021-08-12 19:05:51,804 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:51,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:05:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:51,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:05:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335705909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:51,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:05:51,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 19:05:51,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745545888] [2021-08-12 19:05:51,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:05:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:05:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:05:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:05:51,863 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:05:58,676 INFO L93 Difference]: Finished difference Result 1034 states and 3031 transitions. [2021-08-12 19:05:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:05:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:05:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:05:58,679 INFO L225 Difference]: With dead ends: 1034 [2021-08-12 19:05:58,679 INFO L226 Difference]: Without dead ends: 1025 [2021-08-12 19:05:58,679 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:05:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-08-12 19:05:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-08-12 19:05:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-08-12 19:05:59,085 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-08-12 19:05:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:05:59,085 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-08-12 19:05:59,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:05:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-08-12 19:05:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:05:59,086 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:05:59,086 INFO L550 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:05:59,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10309,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:59,309 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:05:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:05:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-08-12 19:05:59,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:05:59,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920825067] [2021-08-12 19:05:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:05:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:05:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:05:59,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:05:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920825067] [2021-08-12 19:05:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920825067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:05:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576487316] [2021-08-12 19:05:59,447 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:05:59,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:05:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:05:59,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:05:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:05:59,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:05:59,863 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-12 19:06:00,453 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 262 [2021-08-12 19:06:01,542 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 332 [2021-08-12 19:06:01,757 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 394 [2021-08-12 19:06:02,045 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-08-12 19:06:02,330 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-08-12 19:06:02,645 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 389 [2021-08-12 19:06:02,892 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 359 [2021-08-12 19:06:03,030 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 251 [2021-08-12 19:06:03,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:06:03,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:03,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:06:03,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-08-12 19:06:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:03,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576487316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:03,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:06:03,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:06:03,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797100621] [2021-08-12 19:06:03,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:06:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:06:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:06:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:06:03,592 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-08-12 19:06:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:06:06,189 INFO L93 Difference]: Finished difference Result 862 states and 2647 transitions. [2021-08-12 19:06:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:06:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20 [2021-08-12 19:06:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:06:06,192 INFO L225 Difference]: With dead ends: 862 [2021-08-12 19:06:06,192 INFO L226 Difference]: Without dead ends: 826 [2021-08-12 19:06:06,193 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:06:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-08-12 19:06:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-08-12 19:06:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:06:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-08-12 19:06:06,601 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-08-12 19:06:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:06:06,602 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-08-12 19:06:06,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2021-08-12 19:06:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-08-12 19:06:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:06:06,603 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:06:06,603 INFO L550 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:06:06,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10310 [2021-08-12 19:06:06,804 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:06:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:06:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-08-12 19:06:06,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:06:06,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786820829] [2021-08-12 19:06:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:06:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:06:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:06,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:06:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786820829] [2021-08-12 19:06:06,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786820829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312921316] [2021-08-12 19:06:06,905 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:06,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:06:06,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:06:06,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:06:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:06:07,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:07,315 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-12 19:06:08,026 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 353 [2021-08-12 19:06:09,390 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-08-12 19:06:09,585 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-08-12 19:06:09,798 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 356 [2021-08-12 19:06:10,006 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-08-12 19:06:10,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:06:10,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:10,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:06:10,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-08-12 19:06:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:10,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312921316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:10,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:06:10,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-12 19:06:10,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223647411] [2021-08-12 19:06:10,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:06:10,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:06:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:06:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:06:10,817 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-08-12 19:06:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:06:13,657 INFO L93 Difference]: Finished difference Result 886 states and 2719 transitions. [2021-08-12 19:06:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:06:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-08-12 19:06:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:06:13,660 INFO L225 Difference]: With dead ends: 886 [2021-08-12 19:06:13,660 INFO L226 Difference]: Without dead ends: 861 [2021-08-12 19:06:13,660 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:06:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-12 19:06:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-08-12 19:06:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:06:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-08-12 19:06:14,058 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-08-12 19:06:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:06:14,058 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-08-12 19:06:14,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-08-12 19:06:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-08-12 19:06:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:06:14,060 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:06:14,060 INFO L550 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:06:14,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10608,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:14,260 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:06:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:06:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-08-12 19:06:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:06:14,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190788984] [2021-08-12 19:06:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:06:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:06:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:14,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:06:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190788984] [2021-08-12 19:06:14,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190788984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083244754] [2021-08-12 19:06:14,360 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:06:14,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:06:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:06:15,050 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-08-12 19:06:15,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:15,178 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-12 19:06:15,639 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 188 [2021-08-12 19:06:16,292 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 237 [2021-08-12 19:06:16,493 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-08-12 19:06:16,680 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-08-12 19:06:16,888 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 313 [2021-08-12 19:06:17,038 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 274 [2021-08-12 19:06:17,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:06:18,153 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-08-12 19:06:18,153 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-08-12 19:06:18,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-08-12 19:06:19,199 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 241 [2021-08-12 19:06:19,366 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 264 [2021-08-12 19:06:20,092 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-08-12 19:06:20,404 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-08-12 19:06:20,777 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 364 [2021-08-12 19:06:20,955 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 245 [2021-08-12 19:06:21,101 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 248 [2021-08-12 19:06:21,953 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 225 [2021-08-12 19:06:22,106 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-08-12 19:06:22,261 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-08-12 19:06:22,431 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 240 [2021-08-12 19:06:22,602 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 248 [2021-08-12 19:06:23,464 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 176 [2021-08-12 19:06:24,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 19:06:24,375 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-08-12 19:06:24,376 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-08-12 19:06:24,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-08-12 19:06:24,969 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 263 [2021-08-12 19:06:25,991 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 267 [2021-08-12 19:06:26,170 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 283 [2021-08-12 19:06:26,347 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 296 [2021-08-12 19:06:27,567 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 314 [2021-08-12 19:06:27,756 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 339 [2021-08-12 19:06:28,163 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 513 [2021-08-12 19:06:28,667 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-08-12 19:06:29,177 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-08-12 19:06:29,793 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 543 [2021-08-12 19:06:30,236 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 456 [2021-08-12 19:06:30,637 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 292 [2021-08-12 19:06:30,740 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 180 [2021-08-12 19:06:31,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-08-12 19:06:31,595 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-08-12 19:06:31,595 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-08-12 19:06:31,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-08-12 19:06:33,462 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-08-12 19:06:33,614 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-08-12 19:06:33,803 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 253 [2021-08-12 19:06:34,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-08-12 19:06:34,595 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-08-12 19:06:34,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:06:34,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-08-12 19:06:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:34,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083244754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:34,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:06:34,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-12 19:06:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923804444] [2021-08-12 19:06:34,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:06:34,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:06:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:06:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:06:34,625 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-08-12 19:06:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:06:37,711 INFO L93 Difference]: Finished difference Result 903 states and 2757 transitions. [2021-08-12 19:06:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:06:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-08-12 19:06:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:06:37,713 INFO L225 Difference]: With dead ends: 903 [2021-08-12 19:06:37,713 INFO L226 Difference]: Without dead ends: 891 [2021-08-12 19:06:37,713 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:06:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-08-12 19:06:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-08-12 19:06:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:06:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-08-12 19:06:38,126 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-08-12 19:06:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:06:38,126 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-08-12 19:06:38,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-08-12 19:06:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-08-12 19:06:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:06:38,128 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:06:38,128 INFO L550 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:06:38,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11011,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:38,352 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:06:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:06:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-08-12 19:06:38,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:06:38,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032950493] [2021-08-12 19:06:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:06:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:06:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:38,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:06:38,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032950493] [2021-08-12 19:06:38,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032950493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:38,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748403756] [2021-08-12 19:06:38,455 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:38,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:06:38,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:06:38,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:06:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:06:38,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:38,825 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-12 19:06:40,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:06:40,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:40,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:06:40,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-08-12 19:06:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:40,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748403756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:40,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:06:40,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-12 19:06:40,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204734850] [2021-08-12 19:06:40,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:06:40,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:06:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:06:40,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:06:40,238 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-08-12 19:06:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:06:42,928 INFO L93 Difference]: Finished difference Result 947 states and 2969 transitions. [2021-08-12 19:06:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:06:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-08-12 19:06:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:06:42,931 INFO L225 Difference]: With dead ends: 947 [2021-08-12 19:06:42,931 INFO L226 Difference]: Without dead ends: 922 [2021-08-12 19:06:42,931 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:06:42,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-08-12 19:06:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-08-12 19:06:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:06:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-08-12 19:06:43,349 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-08-12 19:06:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:06:43,349 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-08-12 19:06:43,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2021-08-12 19:06:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-08-12 19:06:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:06:43,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:06:43,350 INFO L550 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:06:43,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12560,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:43,551 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:06:43,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:06:43,551 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-08-12 19:06:43,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:06:43,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654752265] [2021-08-12 19:06:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:06:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:06:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:06:43,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:06:43,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654752265] [2021-08-12 19:06:43,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654752265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:06:43,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550036724] [2021-08-12 19:06:43,655 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:06:43,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:06:43,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:06:43,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:06:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:06:44,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:06:44,016 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 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-08-12 19:06:44,593 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-08-12 19:06:44,823 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 262 [2021-08-12 19:06:45,104 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 358 [2021-08-12 19:06:45,358 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 318 [2021-08-12 19:06:45,631 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 183 [2021-08-12 19:06:46,496 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 202 [2021-08-12 19:06:46,743 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 158 [2021-08-12 19:06:47,351 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-08-12 19:06:47,572 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-08-12 19:06:47,826 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 268 [2021-08-12 19:06:47,950 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 231 [2021-08-12 19:06:48,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:06:48,934 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-08-12 19:06:48,935 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-08-12 19:06:48,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-08-12 19:06:50,545 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 212 [2021-08-12 19:06:50,763 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 224 [2021-08-12 19:06:51,018 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 239 [2021-08-12 19:06:51,961 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 221 [2021-08-12 19:06:52,158 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 231 [2021-08-12 19:06:52,408 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 252 [2021-08-12 19:06:52,696 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 262 [2021-08-12 19:06:53,242 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 329 [2021-08-12 19:06:53,882 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 348 [2021-08-12 19:06:54,972 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 185 [2021-08-12 19:06:55,144 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 234 [2021-08-12 19:06:55,354 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 249 [2021-08-12 19:06:55,612 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 259 [2021-08-12 19:06:55,893 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 272 [2021-08-12 19:06:56,623 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 206 [2021-08-12 19:06:56,752 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 214 [2021-08-12 19:06:56,897 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 241 [2021-08-12 19:06:57,074 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 251 [2021-08-12 19:06:57,314 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 294 [2021-08-12 19:06:57,883 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 359 [2021-08-12 19:06:58,580 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 398 [2021-08-12 19:06:59,334 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 399 [2021-08-12 19:07:00,902 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 965 DAG size of output: 559 [2021-08-12 19:07:02,734 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-08-12 19:07:04,540 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-08-12 19:07:06,471 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1039 DAG size of output: 578 [2021-08-12 19:07:07,756 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 580 DAG size of output: 594 [2021-08-12 19:07:08,943 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 573 DAG size of output: 578 [2021-08-12 19:07:10,310 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 567 DAG size of output: 601 [2021-08-12 19:07:11,723 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 562 DAG size of output: 494 [2021-08-12 19:07:11,844 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 443 [2021-08-12 19:07:12,032 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 409 [2021-08-12 19:07:12,960 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 210 [2021-08-12 19:07:13,080 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 216 [2021-08-12 19:07:13,235 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 235 [2021-08-12 19:07:13,398 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 265 [2021-08-12 19:07:13,646 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 299 [2021-08-12 19:07:14,038 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 359 [2021-08-12 19:07:14,508 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 376 [2021-08-12 19:07:15,096 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-08-12 19:07:15,682 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-08-12 19:07:16,360 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 426 [2021-08-12 19:07:17,391 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 428 DAG size of output: 651 [2021-08-12 19:07:18,053 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 343 [2021-08-12 19:07:18,836 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 351 [2021-08-12 19:07:19,804 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 272 [2021-08-12 19:07:19,994 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 286 [2021-08-12 19:07:20,285 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 392 [2021-08-12 19:07:20,907 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 453 [2021-08-12 19:07:21,620 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 323 [2021-08-12 19:07:22,552 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 259 [2021-08-12 19:07:22,711 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 270 [2021-08-12 19:07:22,896 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 273 [2021-08-12 19:07:23,202 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 313 [2021-08-12 19:07:23,627 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 382 [2021-08-12 19:07:24,048 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 444 [2021-08-12 19:07:24,873 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-08-12 19:07:25,701 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-08-12 19:07:26,656 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 1028 DAG size of output: 677 [2021-08-12 19:07:26,904 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 258 [2021-08-12 19:07:27,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 19:07:27,828 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-08-12 19:07:27,828 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-08-12 19:07:27,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-08-12 19:07:29,059 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-08-12 19:07:29,237 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-08-12 19:07:29,493 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 416 [2021-08-12 19:07:29,792 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 522 [2021-08-12 19:07:30,183 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 518 [2021-08-12 19:07:30,518 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 479 [2021-08-12 19:07:30,838 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 485 [2021-08-12 19:07:31,084 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 350 [2021-08-12 19:07:31,877 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 347 [2021-08-12 19:07:32,200 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 416 [2021-08-12 19:07:32,395 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2021-08-12 19:07:33,320 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-08-12 19:07:33,828 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 576 [2021-08-12 19:07:34,613 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 660 [2021-08-12 19:07:34,809 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 352 [2021-08-12 19:07:34,963 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 303 [2021-08-12 19:07:35,511 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 248 [2021-08-12 19:07:36,110 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 390 [2021-08-12 19:07:36,230 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 249 [2021-08-12 19:07:36,362 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 227 [2021-08-12 19:07:36,732 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 241 [2021-08-12 19:07:36,846 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 206 [2021-08-12 19:07:37,404 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 334 [2021-08-12 19:07:37,905 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 554 Received shutdown request... [2021-08-12 19:07:38,974 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1305 DAG size of output: 734 [2021-08-12 19:07:40,321 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-08-12 19:07:41,674 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown