/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-Ea4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:22:16,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:22:16,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:22:16,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:22:16,586 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 [2021-02-19 20:22:16,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:22:16,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:22:16,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:22:16,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:22:16,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:22:16,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:22:16,623 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:22:16,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:22:16,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:22:16,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:22:16,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:22:16,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:22:16,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:22:16,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:22:16,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:22:16,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:22:16,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:22:16,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:22:16,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:22:16,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:22:16,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:22:16,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:22:16,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:22:16,627 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:22:16,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:22:16,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:22:16,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:22:16,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:22:16,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:22:16,958 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:22:16,966 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:22:16,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-Ea4.wvr.bpl [2021-02-19 20:22:16,968 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-Ea4.wvr.bpl' [2021-02-19 20:22:17,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:22:17,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:22:17,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:22:17,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:22:17,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:22:17,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:22:17,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:22:17,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:22:17,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:22:17,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... [2021-02-19 20:22:17,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:22:17,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:22:17,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:22:17,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:22:17,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:22:17,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:22:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:22:17,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:22:17,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:22:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:22:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:22:17,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:22:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:22:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:22:17,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 20:22:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 20:22:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 20:22:17,198 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:22:17,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:22:17,369 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:22:17,370 INFO L202 PluginConnector]: Adding new model threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:22:17 BoogieIcfgContainer [2021-02-19 20:22:17,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:22:17,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:22:17,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:22:17,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:22:17,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:22:17" (1/2) ... [2021-02-19 20:22:17,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7258db74 and model type threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:22:17, skipping insertion in model container [2021-02-19 20:22:17,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:22:17" (2/2) ... [2021-02-19 20:22:17,377 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3-Ea4.wvr.bpl [2021-02-19 20:22:17,381 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:22:17,381 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:22:17,384 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:22:17,384 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:22:17,417 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 20:22:17,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 20:22:17,444 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:22:17,444 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:22:17,444 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:22:17,444 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:22:17,444 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:22:17,444 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:22:17,445 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:22:17,445 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:22:17,451 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-02-19 20:22:17,471 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:22:17,481 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:17,481 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:17,482 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1037789278, now seen corresponding path program 1 times [2021-02-19 20:22:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:17,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943360505] [2021-02-19 20:22:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:17,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943360505] [2021-02-19 20:22:17,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:22:17,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:22:17,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638480583] [2021-02-19 20:22:17,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:22:17,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:22:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:22:17,628 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-02-19 20:22:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:17,704 INFO L93 Difference]: Finished difference Result 126 states and 331 transitions. [2021-02-19 20:22:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:22:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2021-02-19 20:22:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:17,714 INFO L225 Difference]: With dead ends: 126 [2021-02-19 20:22:17,714 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 20:22:17,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:22:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 20:22:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-02-19 20:22:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.648) internal successors, (331), 125 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 331 transitions. [2021-02-19 20:22:17,763 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 331 transitions. Word has length 21 [2021-02-19 20:22:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:17,763 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 331 transitions. [2021-02-19 20:22:17,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-02-19 20:22:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 331 transitions. [2021-02-19 20:22:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 20:22:17,768 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:17,768 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:17,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:22:17,768 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1191275523, now seen corresponding path program 1 times [2021-02-19 20:22:17,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:17,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674809059] [2021-02-19 20:22:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:22:17,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674809059] [2021-02-19 20:22:17,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:22:17,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:22:17,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962952908] [2021-02-19 20:22:17,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:22:17,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:22:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:22:17,829 INFO L87 Difference]: Start difference. First operand 126 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:17,873 INFO L93 Difference]: Finished difference Result 176 states and 475 transitions. [2021-02-19 20:22:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:22:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 20:22:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:17,876 INFO L225 Difference]: With dead ends: 176 [2021-02-19 20:22:17,876 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 20:22:17,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:22:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 20:22:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-02-19 20:22:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 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) [2021-02-19 20:22:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-02-19 20:22:17,901 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 24 [2021-02-19 20:22:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:17,901 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-02-19 20:22:17,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-02-19 20:22:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:22:17,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:17,904 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:17,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 20:22:17,904 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash -757745613, now seen corresponding path program 1 times [2021-02-19 20:22:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:17,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958310482] [2021-02-19 20:22:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:17,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958310482] [2021-02-19 20:22:17,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:22:17,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:22:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499860932] [2021-02-19 20:22:17,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:22:17,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:22:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:22:17,955 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:18,007 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-02-19 20:22:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:22:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:22:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:18,010 INFO L225 Difference]: With dead ends: 223 [2021-02-19 20:22:18,010 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 20:22:18,010 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:22:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 20:22:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-02-19 20:22:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 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) [2021-02-19 20:22:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-02-19 20:22:18,026 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-02-19 20:22:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:18,026 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-02-19 20:22:18,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-02-19 20:22:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 20:22:18,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:18,029 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:18,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 20:22:18,029 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:18,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1825531115, now seen corresponding path program 1 times [2021-02-19 20:22:18,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:18,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147422500] [2021-02-19 20:22:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:22:18,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147422500] [2021-02-19 20:22:18,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:22:18,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:22:18,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371899730] [2021-02-19 20:22:18,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:22:18,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:22:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:22:18,091 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:18,142 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-02-19 20:22:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:22:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 20:22:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:18,146 INFO L225 Difference]: With dead ends: 344 [2021-02-19 20:22:18,146 INFO L226 Difference]: Without dead ends: 308 [2021-02-19 20:22:18,147 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:22:18,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-02-19 20:22:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-02-19 20:22:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-02-19 20:22:18,180 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-02-19 20:22:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:18,180 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-02-19 20:22:18,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-02-19 20:22:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:22:18,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:18,182 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:18,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:22:18,183 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash -857622317, now seen corresponding path program 2 times [2021-02-19 20:22:18,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:18,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997062891] [2021-02-19 20:22:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:18,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997062891] [2021-02-19 20:22:18,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121974467] [2021-02-19 20:22:18,366 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 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 [2021-02-19 20:22:18,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:22:18,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:22:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:18,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:18,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 20:22:18,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345716387] [2021-02-19 20:22:18,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:22:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:22:18,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:22:18,816 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:19,363 INFO L93 Difference]: Finished difference Result 646 states and 1894 transitions. [2021-02-19 20:22:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:22:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 20:22:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:19,369 INFO L225 Difference]: With dead ends: 646 [2021-02-19 20:22:19,369 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 20:22:19,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:22:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 20:22:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 486. [2021-02-19 20:22:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.9690721649484537) internal successors, (1440), 485 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1440 transitions. [2021-02-19 20:22:19,405 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1440 transitions. Word has length 30 [2021-02-19 20:22:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:19,405 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 1440 transitions. [2021-02-19 20:22:19,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1440 transitions. [2021-02-19 20:22:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:22:19,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:19,413 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:19,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:19,636 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1874044433, now seen corresponding path program 3 times [2021-02-19 20:22:19,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:19,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698218656] [2021-02-19 20:22:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:19,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698218656] [2021-02-19 20:22:19,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313726782] [2021-02-19 20:22:19,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:19,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:22:19,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:22:19,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:20,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:20,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 20:22:20,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479288348] [2021-02-19 20:22:20,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:22:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:22:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:22:20,111 INFO L87 Difference]: Start difference. First operand 486 states and 1440 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:20,341 INFO L93 Difference]: Finished difference Result 732 states and 2167 transitions. [2021-02-19 20:22:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:22:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 20:22:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:20,345 INFO L225 Difference]: With dead ends: 732 [2021-02-19 20:22:20,346 INFO L226 Difference]: Without dead ends: 732 [2021-02-19 20:22:20,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:22:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-02-19 20:22:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 390. [2021-02-19 20:22:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.879177377892031) internal successors, (1120), 389 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1120 transitions. [2021-02-19 20:22:20,360 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1120 transitions. Word has length 30 [2021-02-19 20:22:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:20,360 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1120 transitions. [2021-02-19 20:22:20,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1120 transitions. [2021-02-19 20:22:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:22:20,362 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:20,362 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:20,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 20:22:20,584 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1240349297, now seen corresponding path program 4 times [2021-02-19 20:22:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990882256] [2021-02-19 20:22:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:20,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990882256] [2021-02-19 20:22:20,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653864060] [2021-02-19 20:22:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:22:20,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:22:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 20:22:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:21,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:21,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-02-19 20:22:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624774285] [2021-02-19 20:22:21,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:22:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:22:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:22:21,040 INFO L87 Difference]: Start difference. First operand 390 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:21,385 INFO L93 Difference]: Finished difference Result 670 states and 1948 transitions. [2021-02-19 20:22:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:22:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:22:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:21,389 INFO L225 Difference]: With dead ends: 670 [2021-02-19 20:22:21,389 INFO L226 Difference]: Without dead ends: 670 [2021-02-19 20:22:21,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:22:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-02-19 20:22:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 550. [2021-02-19 20:22:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 2.9435336976320583) internal successors, (1616), 549 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1616 transitions. [2021-02-19 20:22:21,405 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1616 transitions. Word has length 32 [2021-02-19 20:22:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:21,405 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1616 transitions. [2021-02-19 20:22:21,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1616 transitions. [2021-02-19 20:22:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:22:21,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:21,407 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:21,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 20:22:21,629 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash -595701139, now seen corresponding path program 5 times [2021-02-19 20:22:21,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:21,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531205772] [2021-02-19 20:22:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:21,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531205772] [2021-02-19 20:22:21,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877809009] [2021-02-19 20:22:21,825 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 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 [2021-02-19 20:22:21,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:22:21,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:21,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 20:22:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:22,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:22,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-02-19 20:22:22,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805779523] [2021-02-19 20:22:22,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:22:22,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:22:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:22:22,196 INFO L87 Difference]: Start difference. First operand 550 states and 1616 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:23,033 INFO L93 Difference]: Finished difference Result 1176 states and 3451 transitions. [2021-02-19 20:22:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:22:23,034 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:22:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:23,039 INFO L225 Difference]: With dead ends: 1176 [2021-02-19 20:22:23,040 INFO L226 Difference]: Without dead ends: 1176 [2021-02-19 20:22:23,040 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 20:22:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-02-19 20:22:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 606. [2021-02-19 20:22:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.935537190082645) internal successors, (1776), 605 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1776 transitions. [2021-02-19 20:22:23,061 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1776 transitions. Word has length 32 [2021-02-19 20:22:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:23,061 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1776 transitions. [2021-02-19 20:22:23,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1776 transitions. [2021-02-19 20:22:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:22:23,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:23,063 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:23,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:23,280 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:23,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1343337903, now seen corresponding path program 6 times [2021-02-19 20:22:23,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706276118] [2021-02-19 20:22:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706276118] [2021-02-19 20:22:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739828208] [2021-02-19 20:22:23,416 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 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 [2021-02-19 20:22:23,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:22:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:22:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:22:23,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:23,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-02-19 20:22:23,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817465487] [2021-02-19 20:22:23,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:22:23,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:22:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:22:23,634 INFO L87 Difference]: Start difference. First operand 606 states and 1776 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:23,808 INFO L93 Difference]: Finished difference Result 898 states and 2510 transitions. [2021-02-19 20:22:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:22:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:22:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:23,814 INFO L225 Difference]: With dead ends: 898 [2021-02-19 20:22:23,814 INFO L226 Difference]: Without dead ends: 898 [2021-02-19 20:22:23,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:22:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-02-19 20:22:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 606. [2021-02-19 20:22:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.950413223140496) internal successors, (1785), 605 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1785 transitions. [2021-02-19 20:22:23,835 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1785 transitions. Word has length 32 [2021-02-19 20:22:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:23,835 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1785 transitions. [2021-02-19 20:22:23,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1785 transitions. [2021-02-19 20:22:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:23,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:23,838 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:24,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:24,060 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1243558769, now seen corresponding path program 7 times [2021-02-19 20:22:24,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:24,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81524214] [2021-02-19 20:22:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:24,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81524214] [2021-02-19 20:22:24,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601323821] [2021-02-19 20:22:24,465 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 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 [2021-02-19 20:22:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:22:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:25,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:25,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:22:25,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122851327] [2021-02-19 20:22:25,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:22:25,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:25,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:22:25,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:22:25,560 INFO L87 Difference]: Start difference. First operand 606 states and 1785 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:26,751 INFO L93 Difference]: Finished difference Result 1216 states and 3475 transitions. [2021-02-19 20:22:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 20:22:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:22:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:26,757 INFO L225 Difference]: With dead ends: 1216 [2021-02-19 20:22:26,757 INFO L226 Difference]: Without dead ends: 1144 [2021-02-19 20:22:26,757 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:22:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-02-19 20:22:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 806. [2021-02-19 20:22:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 2.995031055900621) internal successors, (2411), 805 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2411 transitions. [2021-02-19 20:22:26,782 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2411 transitions. Word has length 34 [2021-02-19 20:22:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:26,783 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2411 transitions. [2021-02-19 20:22:26,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2411 transitions. [2021-02-19 20:22:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:26,785 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:26,785 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:26,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:26,998 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash 99319179, now seen corresponding path program 8 times [2021-02-19 20:22:26,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:26,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575774039] [2021-02-19 20:22:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575774039] [2021-02-19 20:22:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802260414] [2021-02-19 20:22:27,455 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 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 [2021-02-19 20:22:27,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:22:27,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:22:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:28,342 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 20:22:28,616 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-02-19 20:22:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:28,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:28,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:22:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090127054] [2021-02-19 20:22:28,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:22:28,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:28,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:22:28,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:22:28,718 INFO L87 Difference]: Start difference. First operand 806 states and 2411 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:29,209 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 20:22:30,551 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:22:31,026 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 20:22:31,387 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:22:31,742 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:22:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:32,237 INFO L93 Difference]: Finished difference Result 2101 states and 5925 transitions. [2021-02-19 20:22:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 20:22:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:22:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:32,246 INFO L225 Difference]: With dead ends: 2101 [2021-02-19 20:22:32,246 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 20:22:32,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=865, Invalid=3965, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:22:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 20:22:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 940. [2021-02-19 20:22:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.0415335463258786) internal successors, (2856), 939 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2856 transitions. [2021-02-19 20:22:32,282 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2856 transitions. Word has length 34 [2021-02-19 20:22:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:32,282 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2856 transitions. [2021-02-19 20:22:32,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2856 transitions. [2021-02-19 20:22:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:32,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:32,284 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:32,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 20:22:32,507 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1425961677, now seen corresponding path program 9 times [2021-02-19 20:22:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:32,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210905649] [2021-02-19 20:22:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:32,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210905649] [2021-02-19 20:22:32,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426228880] [2021-02-19 20:22:32,863 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 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 [2021-02-19 20:22:32,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:22:32,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:22:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:33,879 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 20:22:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:34,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:34,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:22:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895344285] [2021-02-19 20:22:34,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:22:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:22:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:22:34,006 INFO L87 Difference]: Start difference. First operand 940 states and 2856 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:35,929 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:22:36,439 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 20:22:36,837 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:22:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:37,255 INFO L93 Difference]: Finished difference Result 2730 states and 7924 transitions. [2021-02-19 20:22:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:22:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:22:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:37,265 INFO L225 Difference]: With dead ends: 2730 [2021-02-19 20:22:37,265 INFO L226 Difference]: Without dead ends: 2410 [2021-02-19 20:22:37,266 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=857, Invalid=3565, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:22:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-02-19 20:22:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1090. [2021-02-19 20:22:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.1028466483011936) internal successors, (3379), 1089 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3379 transitions. [2021-02-19 20:22:37,302 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3379 transitions. Word has length 34 [2021-02-19 20:22:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:37,302 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3379 transitions. [2021-02-19 20:22:37,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3379 transitions. [2021-02-19 20:22:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:37,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:37,305 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:37,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 20:22:37,522 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1840933751, now seen corresponding path program 10 times [2021-02-19 20:22:37,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:37,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51759379] [2021-02-19 20:22:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51759379] [2021-02-19 20:22:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922571280] [2021-02-19 20:22:37,845 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 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 [2021-02-19 20:22:37,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:22:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:22:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:38,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:38,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:22:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634149285] [2021-02-19 20:22:38,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:22:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:22:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:22:38,877 INFO L87 Difference]: Start difference. First operand 1090 states and 3379 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:39,298 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 20:22:39,495 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:22:39,656 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 20:22:40,089 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 20:22:40,369 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-02-19 20:22:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:41,450 INFO L93 Difference]: Finished difference Result 2642 states and 7900 transitions. [2021-02-19 20:22:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:22:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:22:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:41,459 INFO L225 Difference]: With dead ends: 2642 [2021-02-19 20:22:41,459 INFO L226 Difference]: Without dead ends: 2570 [2021-02-19 20:22:41,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=787, Invalid=3119, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:22:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-02-19 20:22:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1278. [2021-02-19 20:22:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.129992169146437) internal successors, (3997), 1277 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 3997 transitions. [2021-02-19 20:22:41,501 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 3997 transitions. Word has length 34 [2021-02-19 20:22:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:41,501 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 3997 transitions. [2021-02-19 20:22:41,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 3997 transitions. [2021-02-19 20:22:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:41,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:41,504 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:41,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:41,728 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:41,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1621746551, now seen corresponding path program 11 times [2021-02-19 20:22:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:41,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612517069] [2021-02-19 20:22:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:42,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612517069] [2021-02-19 20:22:42,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975867098] [2021-02-19 20:22:42,071 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 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 [2021-02-19 20:22:42,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:22:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:42,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:22:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:43,047 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 20:22:43,249 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-02-19 20:22:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:43,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:43,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:22:43,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085655189] [2021-02-19 20:22:43,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:22:43,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:22:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:22:43,431 INFO L87 Difference]: Start difference. First operand 1278 states and 3997 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:44,244 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-02-19 20:22:44,725 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:22:44,879 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 20:22:45,259 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:22:46,058 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 20:22:46,332 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-02-19 20:22:46,843 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 20:22:47,070 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2021-02-19 20:22:47,512 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:22:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:47,804 INFO L93 Difference]: Finished difference Result 3169 states and 9530 transitions. [2021-02-19 20:22:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 20:22:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:22:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:47,818 INFO L225 Difference]: With dead ends: 3169 [2021-02-19 20:22:47,819 INFO L226 Difference]: Without dead ends: 3094 [2021-02-19 20:22:47,820 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1498, Invalid=4982, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:22:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-02-19 20:22:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 1444. [2021-02-19 20:22:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.1503811503811505) internal successors, (4546), 1443 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4546 transitions. [2021-02-19 20:22:47,858 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4546 transitions. Word has length 34 [2021-02-19 20:22:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:47,859 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 4546 transitions. [2021-02-19 20:22:47,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4546 transitions. [2021-02-19 20:22:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:47,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:47,862 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:48,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:48,078 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1464662903, now seen corresponding path program 12 times [2021-02-19 20:22:48,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:48,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900151657] [2021-02-19 20:22:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:48,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900151657] [2021-02-19 20:22:48,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624479624] [2021-02-19 20:22:48,439 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:22:48,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:22:48,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:48,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:49,156 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:22:49,560 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 20:22:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:49,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:49,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:22:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048123991] [2021-02-19 20:22:49,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:22:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:22:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:22:49,681 INFO L87 Difference]: Start difference. First operand 1444 states and 4546 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:50,125 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 20:22:50,469 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 20:22:50,746 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 20:22:50,959 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 20:22:51,270 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:22:51,567 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-02-19 20:22:51,806 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 20:22:52,033 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 34 [2021-02-19 20:22:52,389 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:22:52,660 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-02-19 20:22:52,914 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 20:22:53,057 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 20:22:53,196 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 20:22:53,435 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 20:22:53,826 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 20:22:54,094 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-19 20:22:54,321 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:22:54,489 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:22:54,869 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:22:55,246 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-19 20:22:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:55,895 INFO L93 Difference]: Finished difference Result 5680 states and 17200 transitions. [2021-02-19 20:22:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 20:22:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:22:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:55,909 INFO L225 Difference]: With dead ends: 5680 [2021-02-19 20:22:55,910 INFO L226 Difference]: Without dead ends: 5267 [2021-02-19 20:22:55,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:22:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-02-19 20:22:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 1974. [2021-02-19 20:22:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.2179422199695895) internal successors, (6349), 1973 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6349 transitions. [2021-02-19 20:22:55,978 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6349 transitions. Word has length 34 [2021-02-19 20:22:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:55,978 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 6349 transitions. [2021-02-19 20:22:55,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6349 transitions. [2021-02-19 20:22:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:22:55,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:55,983 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:56,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-02-19 20:22:56,205 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash -354547013, now seen corresponding path program 13 times [2021-02-19 20:22:56,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:56,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926990397] [2021-02-19 20:22:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:56,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926990397] [2021-02-19 20:22:56,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849017881] [2021-02-19 20:22:56,513 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 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 [2021-02-19 20:22:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:22:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:57,372 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-02-19 20:22:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:57,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:57,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:22:57,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984718686] [2021-02-19 20:22:57,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:22:57,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:22:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:22:57,707 INFO L87 Difference]: Start difference. First operand 1974 states and 6349 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:58,335 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 20:22:58,538 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 20:22:58,958 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 20:22:59,768 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:23:00,105 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-19 20:23:00,404 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 20:23:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:01,416 INFO L93 Difference]: Finished difference Result 4874 states and 15152 transitions. [2021-02-19 20:23:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 20:23:01,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:01,430 INFO L225 Difference]: With dead ends: 4874 [2021-02-19 20:23:01,430 INFO L226 Difference]: Without dead ends: 4593 [2021-02-19 20:23:01,432 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=955, Invalid=3335, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:23:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-02-19 20:23:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2277. [2021-02-19 20:23:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 3.239894551845343) internal successors, (7374), 2276 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 7374 transitions. [2021-02-19 20:23:01,505 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 7374 transitions. Word has length 34 [2021-02-19 20:23:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:01,505 INFO L480 AbstractCegarLoop]: Abstraction has 2277 states and 7374 transitions. [2021-02-19 20:23:01,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 7374 transitions. [2021-02-19 20:23:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:01,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:01,511 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:01,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 20:23:01,729 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1340297677, now seen corresponding path program 14 times [2021-02-19 20:23:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:01,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705556770] [2021-02-19 20:23:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:02,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705556770] [2021-02-19 20:23:02,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375654889] [2021-02-19 20:23:02,176 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 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 [2021-02-19 20:23:02,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:23:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:23:02,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:02,775 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 20:23:03,005 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 20:23:03,329 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-02-19 20:23:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:03,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:03,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:23:03,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310295232] [2021-02-19 20:23:03,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:23:03,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:03,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:23:03,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:23:03,423 INFO L87 Difference]: Start difference. First operand 2277 states and 7374 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:04,295 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:04,940 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 20:23:05,147 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 20:23:05,593 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 20:23:05,931 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:23:06,181 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 20:23:06,528 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-02-19 20:23:06,951 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:23:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:07,443 INFO L93 Difference]: Finished difference Result 3757 states and 11473 transitions. [2021-02-19 20:23:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 20:23:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:07,459 INFO L225 Difference]: With dead ends: 3757 [2021-02-19 20:23:07,459 INFO L226 Difference]: Without dead ends: 3446 [2021-02-19 20:23:07,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=787, Invalid=4183, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:23:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-02-19 20:23:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2645. [2021-02-19 20:23:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.235627836611195) internal successors, (8555), 2644 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8555 transitions. [2021-02-19 20:23:07,522 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8555 transitions. Word has length 34 [2021-02-19 20:23:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:07,523 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 8555 transitions. [2021-02-19 20:23:07,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8555 transitions. [2021-02-19 20:23:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:07,529 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:07,529 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:07,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-02-19 20:23:07,743 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1618219273, now seen corresponding path program 15 times [2021-02-19 20:23:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:07,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897201364] [2021-02-19 20:23:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:08,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897201364] [2021-02-19 20:23:08,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146626437] [2021-02-19 20:23:08,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:23:08,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:23:08,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:23:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:08,917 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 20:23:09,194 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:23:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:09,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:09,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:23:09,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013538445] [2021-02-19 20:23:09,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:23:09,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:09,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:23:09,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:23:09,339 INFO L87 Difference]: Start difference. First operand 2645 states and 8555 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:10,530 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-02-19 20:23:10,701 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:23:11,272 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:23:11,833 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 20:23:12,031 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:12,270 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:23:12,413 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 20:23:12,655 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:23:13,104 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 20:23:13,328 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:23:13,722 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-02-19 20:23:14,019 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:23:14,435 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:23:14,746 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:23:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:15,397 INFO L93 Difference]: Finished difference Result 7155 states and 22256 transitions. [2021-02-19 20:23:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 20:23:15,397 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:15,415 INFO L225 Difference]: With dead ends: 7155 [2021-02-19 20:23:15,415 INFO L226 Difference]: Without dead ends: 6793 [2021-02-19 20:23:15,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1569, Invalid=5571, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 20:23:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2021-02-19 20:23:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 3952. [2021-02-19 20:23:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 3.269805112629714) internal successors, (12919), 3951 states have internal predecessors, (12919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 12919 transitions. [2021-02-19 20:23:15,539 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 12919 transitions. Word has length 34 [2021-02-19 20:23:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:15,539 INFO L480 AbstractCegarLoop]: Abstraction has 3952 states and 12919 transitions. [2021-02-19 20:23:15,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 12919 transitions. [2021-02-19 20:23:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:15,549 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:15,549 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:15,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:23:15,766 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:15,766 INFO L82 PathProgramCache]: Analyzing trace with hash -799869765, now seen corresponding path program 16 times [2021-02-19 20:23:15,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:15,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029616888] [2021-02-19 20:23:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:16,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029616888] [2021-02-19 20:23:16,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185368091] [2021-02-19 20:23:16,171 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 [2021-02-19 20:23:16,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:23:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:23:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:16,747 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:23:17,132 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:23:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:17,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:17,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:23:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777786436] [2021-02-19 20:23:17,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:23:17,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:23:17,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:23:17,504 INFO L87 Difference]: Start difference. First operand 3952 states and 12919 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:18,217 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:23:18,655 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:23:19,172 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:23:19,829 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:20,568 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-19 20:23:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:21,080 INFO L93 Difference]: Finished difference Result 6123 states and 19299 transitions. [2021-02-19 20:23:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 20:23:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:21,098 INFO L225 Difference]: With dead ends: 6123 [2021-02-19 20:23:21,098 INFO L226 Difference]: Without dead ends: 6072 [2021-02-19 20:23:21,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 20:23:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-02-19 20:23:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4272. [2021-02-19 20:23:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4271 states have (on average 3.281432919690939) internal successors, (14015), 4271 states have internal predecessors, (14015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 14015 transitions. [2021-02-19 20:23:21,222 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 14015 transitions. Word has length 34 [2021-02-19 20:23:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:21,223 INFO L480 AbstractCegarLoop]: Abstraction has 4272 states and 14015 transitions. [2021-02-19 20:23:21,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 14015 transitions. [2021-02-19 20:23:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:21,233 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:21,233 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:21,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:23:21,450 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:21,451 INFO L82 PathProgramCache]: Analyzing trace with hash 254299323, now seen corresponding path program 17 times [2021-02-19 20:23:21,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:21,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459909022] [2021-02-19 20:23:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:21,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459909022] [2021-02-19 20:23:21,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192459407] [2021-02-19 20:23:21,834 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 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 [2021-02-19 20:23:21,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:23:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:23:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:22,413 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:23:22,809 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:23:22,993 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:23:23,252 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:23:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:23:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073624162] [2021-02-19 20:23:23,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:23:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:23:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:23:23,456 INFO L87 Difference]: Start difference. First operand 4272 states and 14015 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:24,433 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-02-19 20:23:25,041 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:23:25,610 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:23:26,231 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:23:26,830 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-02-19 20:23:27,002 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-02-19 20:23:27,198 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:27,393 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:27,670 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-02-19 20:23:27,837 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 20:23:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:28,271 INFO L93 Difference]: Finished difference Result 9418 states and 29999 transitions. [2021-02-19 20:23:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 20:23:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:28,288 INFO L225 Difference]: With dead ends: 9418 [2021-02-19 20:23:28,289 INFO L226 Difference]: Without dead ends: 9316 [2021-02-19 20:23:28,289 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1348, Invalid=5294, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:23:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-02-19 20:23:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 5318. [2021-02-19 20:23:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5318 states, 5317 states have (on average 3.3009215723152154) internal successors, (17551), 5317 states have internal predecessors, (17551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 17551 transitions. [2021-02-19 20:23:28,442 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 17551 transitions. Word has length 34 [2021-02-19 20:23:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:28,442 INFO L480 AbstractCegarLoop]: Abstraction has 5318 states and 17551 transitions. [2021-02-19 20:23:28,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 17551 transitions. [2021-02-19 20:23:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:28,456 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:28,456 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:28,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:23:28,670 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1433400133, now seen corresponding path program 18 times [2021-02-19 20:23:28,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:28,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402767789] [2021-02-19 20:23:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402767789] [2021-02-19 20:23:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619100090] [2021-02-19 20:23:29,087 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 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 [2021-02-19 20:23:29,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:23:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:29,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:23:29,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:29,698 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:23:30,013 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:23:30,341 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:23:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:30,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:30,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:23:30,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112308193] [2021-02-19 20:23:30,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:23:30,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:23:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:23:30,474 INFO L87 Difference]: Start difference. First operand 5318 states and 17551 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:31,065 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:23:31,580 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:23:31,986 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:23:32,268 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:32,666 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:23:32,930 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:23:33,608 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:23:34,179 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:23:34,435 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:23:34,842 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:23:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:35,713 INFO L93 Difference]: Finished difference Result 10127 states and 32309 transitions. [2021-02-19 20:23:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:23:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:35,732 INFO L225 Difference]: With dead ends: 10127 [2021-02-19 20:23:35,732 INFO L226 Difference]: Without dead ends: 9768 [2021-02-19 20:23:35,733 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1136, Invalid=5026, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 20:23:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-02-19 20:23:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 5562. [2021-02-19 20:23:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 3.3053407660492717) internal successors, (18381), 5561 states have internal predecessors, (18381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 18381 transitions. [2021-02-19 20:23:35,903 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 18381 transitions. Word has length 34 [2021-02-19 20:23:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:35,903 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 18381 transitions. [2021-02-19 20:23:35,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 18381 transitions. [2021-02-19 20:23:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:35,916 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:35,916 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:36,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:23:36,134 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash 940541319, now seen corresponding path program 19 times [2021-02-19 20:23:36,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:36,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131921647] [2021-02-19 20:23:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131921647] [2021-02-19 20:23:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636795280] [2021-02-19 20:23:36,498 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 [2021-02-19 20:23:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:23:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:37,067 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:23:37,344 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:23:37,651 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:23:37,911 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 20:23:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:38,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:38,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 20:23:38,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286390983] [2021-02-19 20:23:38,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:23:38,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:23:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:23:38,110 INFO L87 Difference]: Start difference. First operand 5562 states and 18381 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:39,226 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-02-19 20:23:39,448 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 20:23:39,800 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-02-19 20:23:40,324 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:23:40,525 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 20:23:40,735 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 20:23:40,919 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 20:23:41,278 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:41,434 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:23:41,677 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-02-19 20:23:42,051 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 20:23:42,289 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 20:23:42,554 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:23:42,726 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-02-19 20:23:42,921 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:23:43,053 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:23:43,201 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 20:23:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:43,686 INFO L93 Difference]: Finished difference Result 13062 states and 42271 transitions. [2021-02-19 20:23:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:23:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:43,726 INFO L225 Difference]: With dead ends: 13062 [2021-02-19 20:23:43,727 INFO L226 Difference]: Without dead ends: 12975 [2021-02-19 20:23:43,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1432, Invalid=5048, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:23:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-02-19 20:23:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 7340. [2021-02-19 20:23:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.336558114184494) internal successors, (24487), 7339 states have internal predecessors, (24487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 24487 transitions. [2021-02-19 20:23:44,025 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 24487 transitions. Word has length 34 [2021-02-19 20:23:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:44,026 INFO L480 AbstractCegarLoop]: Abstraction has 7340 states and 24487 transitions. [2021-02-19 20:23:44,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 24487 transitions. [2021-02-19 20:23:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:44,049 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:44,049 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:44,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-02-19 20:23:44,262 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 783457671, now seen corresponding path program 20 times [2021-02-19 20:23:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430398067] [2021-02-19 20:23:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:44,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430398067] [2021-02-19 20:23:44,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180270888] [2021-02-19 20:23:44,701 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 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 [2021-02-19 20:23:44,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:23:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:23:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:45,378 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:23:45,603 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:23:45,972 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:23:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:46,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:46,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:23:46,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331361434] [2021-02-19 20:23:46,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:23:46,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:46,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:23:46,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:23:46,123 INFO L87 Difference]: Start difference. First operand 7340 states and 24487 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:47,019 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:47,858 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:23:48,191 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:23:48,321 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 20:23:49,089 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:23:49,313 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:23:49,563 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:23:49,845 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:23:49,992 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:23:50,184 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:23:50,461 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:23:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:51,397 INFO L93 Difference]: Finished difference Result 14783 states and 48239 transitions. [2021-02-19 20:23:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 20:23:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:51,427 INFO L225 Difference]: With dead ends: 14783 [2021-02-19 20:23:51,427 INFO L226 Difference]: Without dead ends: 14361 [2021-02-19 20:23:51,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1086, Invalid=4316, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:23:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14361 states. [2021-02-19 20:23:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14361 to 8734. [2021-02-19 20:23:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8734 states, 8733 states have (on average 3.3506240696209777) internal successors, (29261), 8733 states have internal predecessors, (29261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8734 states to 8734 states and 29261 transitions. [2021-02-19 20:23:51,664 INFO L78 Accepts]: Start accepts. Automaton has 8734 states and 29261 transitions. Word has length 34 [2021-02-19 20:23:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:51,664 INFO L480 AbstractCegarLoop]: Abstraction has 8734 states and 29261 transitions. [2021-02-19 20:23:51,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 8734 states and 29261 transitions. [2021-02-19 20:23:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:51,684 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:51,684 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:51,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 20:23:51,909 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1835171925, now seen corresponding path program 21 times [2021-02-19 20:23:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:51,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569741214] [2021-02-19 20:23:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:52,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569741214] [2021-02-19 20:23:52,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825720922] [2021-02-19 20:23:52,235 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 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 [2021-02-19 20:23:52,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:23:52,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:52,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:23:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:52,806 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:23:53,145 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:23:53,514 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:23:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:53,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:23:53,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:23:53,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599232870] [2021-02-19 20:23:53,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:23:53,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:23:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:23:53,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:23:53,625 INFO L87 Difference]: Start difference. First operand 8734 states and 29261 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:54,378 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:23:54,813 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:23:55,310 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:23:55,523 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 20:23:55,978 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:23:57,019 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:23:57,407 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:23:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:23:58,035 INFO L93 Difference]: Finished difference Result 13041 states and 42542 transitions. [2021-02-19 20:23:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:23:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:23:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:23:58,059 INFO L225 Difference]: With dead ends: 13041 [2021-02-19 20:23:58,059 INFO L226 Difference]: Without dead ends: 12684 [2021-02-19 20:23:58,060 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=909, Invalid=4061, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:23:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12684 states. [2021-02-19 20:23:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12684 to 8908. [2021-02-19 20:23:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8908 states, 8907 states have (on average 3.3490513079600315) internal successors, (29830), 8907 states have internal predecessors, (29830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 29830 transitions. [2021-02-19 20:23:58,257 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 29830 transitions. Word has length 34 [2021-02-19 20:23:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:23:58,257 INFO L480 AbstractCegarLoop]: Abstraction has 8908 states and 29830 transitions. [2021-02-19 20:23:58,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:23:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 29830 transitions. [2021-02-19 20:23:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:23:58,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:23:58,324 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:23:58,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-02-19 20:23:58,546 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:23:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:23:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1431723503, now seen corresponding path program 22 times [2021-02-19 20:23:58,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:23:58,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229777486] [2021-02-19 20:23:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:23:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:23:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:23:58,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229777486] [2021-02-19 20:23:58,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143867069] [2021-02-19 20:23:58,891 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 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 [2021-02-19 20:23:58,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:23:58,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:23:58,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:23:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:23:59,436 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:23:59,646 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:24:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:00,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:00,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:24:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495815582] [2021-02-19 20:24:00,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:24:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:24:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:24:00,197 INFO L87 Difference]: Start difference. First operand 8908 states and 29830 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:00,391 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 20:24:01,132 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:24:01,633 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:24:02,037 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:24:02,312 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:24:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:03,226 INFO L93 Difference]: Finished difference Result 12200 states and 40288 transitions. [2021-02-19 20:24:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:24:03,227 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:03,250 INFO L225 Difference]: With dead ends: 12200 [2021-02-19 20:24:03,251 INFO L226 Difference]: Without dead ends: 12128 [2021-02-19 20:24:03,251 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=774, Invalid=3008, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:24:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12128 states. [2021-02-19 20:24:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12128 to 8974. [2021-02-19 20:24:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 3.3484899141870055) internal successors, (30046), 8973 states have internal predecessors, (30046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 30046 transitions. [2021-02-19 20:24:03,521 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 30046 transitions. Word has length 34 [2021-02-19 20:24:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:03,521 INFO L480 AbstractCegarLoop]: Abstraction has 8974 states and 30046 transitions. [2021-02-19 20:24:03,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 30046 transitions. [2021-02-19 20:24:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:03,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:03,536 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:03,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-02-19 20:24:03,738 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1212536303, now seen corresponding path program 23 times [2021-02-19 20:24:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:03,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723139385] [2021-02-19 20:24:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:04,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723139385] [2021-02-19 20:24:04,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603441149] [2021-02-19 20:24:04,161 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 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 [2021-02-19 20:24:04,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:24:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:24:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:24:04,669 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:24:04,888 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:24:05,344 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:24:05,660 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:24:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:05,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:05,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:24:05,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31627922] [2021-02-19 20:24:05,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:24:05,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:24:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:24:05,850 INFO L87 Difference]: Start difference. First operand 8974 states and 30046 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:07,273 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-02-19 20:24:07,884 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:24:08,102 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-02-19 20:24:08,761 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:24:09,463 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 20:24:09,862 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-02-19 20:24:10,555 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-02-19 20:24:10,772 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-02-19 20:24:11,048 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:24:11,323 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 20:24:11,453 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:24:11,663 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-02-19 20:24:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:11,886 INFO L93 Difference]: Finished difference Result 15037 states and 49384 transitions. [2021-02-19 20:24:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:24:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:11,912 INFO L225 Difference]: With dead ends: 15037 [2021-02-19 20:24:11,912 INFO L226 Difference]: Without dead ends: 14962 [2021-02-19 20:24:11,912 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1645, Invalid=5837, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 20:24:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2021-02-19 20:24:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 9146. [2021-02-19 20:24:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9146 states, 9145 states have (on average 3.3429196282121376) internal successors, (30571), 9145 states have internal predecessors, (30571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 30571 transitions. [2021-02-19 20:24:12,078 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 30571 transitions. Word has length 34 [2021-02-19 20:24:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:12,078 INFO L480 AbstractCegarLoop]: Abstraction has 9146 states and 30571 transitions. [2021-02-19 20:24:12,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 30571 transitions. [2021-02-19 20:24:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:12,088 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:12,089 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:12,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:24:12,289 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1055452655, now seen corresponding path program 24 times [2021-02-19 20:24:12,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:12,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306254113] [2021-02-19 20:24:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:12,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306254113] [2021-02-19 20:24:12,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653488465] [2021-02-19 20:24:12,766 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:24:12,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:24:12,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:24:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:24:13,380 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:24:13,581 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:24:14,007 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:24:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:14,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:14,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:24:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803837941] [2021-02-19 20:24:14,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:24:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:24:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:24:14,124 INFO L87 Difference]: Start difference. First operand 9146 states and 30571 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:14,970 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:24:15,442 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:24:15,849 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:24:16,327 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:24:16,529 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:24:17,072 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:24:17,222 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:24:17,489 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:24:17,787 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 20:24:18,153 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:24:18,475 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:24:18,780 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:24:18,963 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:24:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:19,965 INFO L93 Difference]: Finished difference Result 16097 states and 52762 transitions. [2021-02-19 20:24:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 20:24:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:19,995 INFO L225 Difference]: With dead ends: 16097 [2021-02-19 20:24:19,995 INFO L226 Difference]: Without dead ends: 15631 [2021-02-19 20:24:19,996 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1114, Invalid=4436, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 20:24:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-02-19 20:24:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 9196. [2021-02-19 20:24:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 3.344970092441544) internal successors, (30757), 9195 states have internal predecessors, (30757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 30757 transitions. [2021-02-19 20:24:20,179 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 30757 transitions. Word has length 34 [2021-02-19 20:24:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:20,179 INFO L480 AbstractCegarLoop]: Abstraction has 9196 states and 30757 transitions. [2021-02-19 20:24:20,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 30757 transitions. [2021-02-19 20:24:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:20,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:20,195 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:20,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-02-19 20:24:20,395 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash -763757261, now seen corresponding path program 25 times [2021-02-19 20:24:20,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:20,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535156444] [2021-02-19 20:24:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:20,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535156444] [2021-02-19 20:24:20,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676687730] [2021-02-19 20:24:20,764 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 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 [2021-02-19 20:24:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:20,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:24:20,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:24:21,376 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:24:21,577 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:24:21,871 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:24:22,017 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:24:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:22,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:22,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:24:22,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943774356] [2021-02-19 20:24:22,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:24:22,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:24:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:24:22,210 INFO L87 Difference]: Start difference. First operand 9196 states and 30757 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:23,146 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:24:23,610 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:24:24,105 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:24:24,364 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:24:24,651 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:24:25,078 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 20:24:25,554 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:24:25,836 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:24:26,063 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 20:24:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:27,484 INFO L93 Difference]: Finished difference Result 15913 states and 52373 transitions. [2021-02-19 20:24:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:24:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:27,516 INFO L225 Difference]: With dead ends: 15913 [2021-02-19 20:24:27,516 INFO L226 Difference]: Without dead ends: 15585 [2021-02-19 20:24:27,517 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=994, Invalid=3562, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:24:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2021-02-19 20:24:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 9252. [2021-02-19 20:24:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9252 states, 9251 states have (on average 3.345908550426981) internal successors, (30953), 9251 states have internal predecessors, (30953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9252 states to 9252 states and 30953 transitions. [2021-02-19 20:24:27,788 INFO L78 Accepts]: Start accepts. Automaton has 9252 states and 30953 transitions. Word has length 34 [2021-02-19 20:24:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:27,788 INFO L480 AbstractCegarLoop]: Abstraction has 9252 states and 30953 transitions. [2021-02-19 20:24:27,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states and 30953 transitions. [2021-02-19 20:24:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:27,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:27,802 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:28,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:24:28,003 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash 572455031, now seen corresponding path program 26 times [2021-02-19 20:24:28,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:28,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844272732] [2021-02-19 20:24:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:28,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844272732] [2021-02-19 20:24:28,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096650595] [2021-02-19 20:24:28,459 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 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 [2021-02-19 20:24:28,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:24:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:24:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:24:29,142 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:24:29,402 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:24:29,744 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 20:24:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:29,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:29,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:24:29,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040177647] [2021-02-19 20:24:29,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:24:29,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:29,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:24:29,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:24:29,822 INFO L87 Difference]: Start difference. First operand 9252 states and 30953 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:31,201 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:24:31,971 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 20:24:32,104 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 20:24:32,494 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 20:24:32,709 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 20:24:32,993 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 20:24:33,608 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:24:33,756 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-02-19 20:24:34,841 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-02-19 20:24:35,088 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:24:35,405 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-02-19 20:24:35,730 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 20:24:36,085 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-02-19 20:24:36,388 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:24:36,558 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:24:37,099 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:24:37,425 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:24:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:38,346 INFO L93 Difference]: Finished difference Result 14856 states and 48487 transitions. [2021-02-19 20:24:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-02-19 20:24:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:38,375 INFO L225 Difference]: With dead ends: 14856 [2021-02-19 20:24:38,376 INFO L226 Difference]: Without dead ends: 14505 [2021-02-19 20:24:38,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1789, Invalid=8923, Unknown=0, NotChecked=0, Total=10712 [2021-02-19 20:24:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2021-02-19 20:24:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 9576. [2021-02-19 20:24:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 9575 states have (on average 3.3461096605744127) internal successors, (32039), 9575 states have internal predecessors, (32039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 32039 transitions. [2021-02-19 20:24:38,572 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 32039 transitions. Word has length 34 [2021-02-19 20:24:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:38,572 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 32039 transitions. [2021-02-19 20:24:38,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 32039 transitions. [2021-02-19 20:24:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:38,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:38,586 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:38,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-02-19 20:24:38,786 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash -299968453, now seen corresponding path program 27 times [2021-02-19 20:24:38,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:38,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971403640] [2021-02-19 20:24:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:39,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971403640] [2021-02-19 20:24:39,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281371111] [2021-02-19 20:24:39,114 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 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 [2021-02-19 20:24:39,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:24:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:24:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:24:40,008 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:24:40,346 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:24:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:40,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:40,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:24:40,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766680030] [2021-02-19 20:24:40,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:24:40,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:40,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:24:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:24:40,450 INFO L87 Difference]: Start difference. First operand 9576 states and 32039 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:40,641 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 20:24:41,420 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 20:24:41,803 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:24:42,329 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:24:42,699 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 20:24:42,996 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-02-19 20:24:43,364 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:24:43,531 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:43,791 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:24:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:44,555 INFO L93 Difference]: Finished difference Result 15149 states and 49635 transitions. [2021-02-19 20:24:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:24:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:44,586 INFO L225 Difference]: With dead ends: 15149 [2021-02-19 20:24:44,586 INFO L226 Difference]: Without dead ends: 14792 [2021-02-19 20:24:44,587 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:24:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14792 states. [2021-02-19 20:24:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14792 to 9678. [2021-02-19 20:24:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 3.3461816678722744) internal successors, (32381), 9677 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 32381 transitions. [2021-02-19 20:24:44,772 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 32381 transitions. Word has length 34 [2021-02-19 20:24:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:44,773 INFO L480 AbstractCegarLoop]: Abstraction has 9678 states and 32381 transitions. [2021-02-19 20:24:44,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 32381 transitions. [2021-02-19 20:24:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:44,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:44,790 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:44,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:24:44,995 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1675860881, now seen corresponding path program 28 times [2021-02-19 20:24:44,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:44,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155183993] [2021-02-19 20:24:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:45,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155183993] [2021-02-19 20:24:45,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557614376] [2021-02-19 20:24:45,346 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 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 [2021-02-19 20:24:45,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:24:45,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:24:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:24:46,136 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 20:24:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:46,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:46,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:24:46,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985578404] [2021-02-19 20:24:46,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:24:46,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:24:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:24:46,706 INFO L87 Difference]: Start difference. First operand 9678 states and 32381 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:47,062 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:24:47,464 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 20:24:47,885 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 20:24:48,245 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 20:24:48,587 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 20:24:48,873 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:24:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:49,879 INFO L93 Difference]: Finished difference Result 14742 states and 48530 transitions. [2021-02-19 20:24:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:24:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:49,906 INFO L225 Difference]: With dead ends: 14742 [2021-02-19 20:24:49,907 INFO L226 Difference]: Without dead ends: 14670 [2021-02-19 20:24:49,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=758, Invalid=3024, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:24:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14670 states. [2021-02-19 20:24:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14670 to 9802. [2021-02-19 20:24:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 9801 states have (on average 3.346291194776043) internal successors, (32797), 9801 states have internal predecessors, (32797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 32797 transitions. [2021-02-19 20:24:50,117 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 32797 transitions. Word has length 34 [2021-02-19 20:24:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:50,117 INFO L480 AbstractCegarLoop]: Abstraction has 9802 states and 32797 transitions. [2021-02-19 20:24:50,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 32797 transitions. [2021-02-19 20:24:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:50,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:50,134 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:50,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-02-19 20:24:50,350 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1895048081, now seen corresponding path program 29 times [2021-02-19 20:24:50,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:50,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160391899] [2021-02-19 20:24:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:50,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160391899] [2021-02-19 20:24:50,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963261918] [2021-02-19 20:24:50,733 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 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 [2021-02-19 20:24:50,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:24:50,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:50,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:24:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:24:51,327 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:24:51,668 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:24:52,132 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:24:52,404 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-02-19 20:24:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:52,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:24:52,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:24:52,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796397161] [2021-02-19 20:24:52,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:24:52,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:24:52,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:24:52,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:24:52,601 INFO L87 Difference]: Start difference. First operand 9802 states and 32797 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:52,932 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-02-19 20:24:53,350 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:24:53,560 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-02-19 20:24:53,976 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:24:54,397 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:24:54,656 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:24:55,245 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:24:55,578 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-19 20:24:55,987 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 20:24:56,376 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-02-19 20:24:56,594 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 20:24:57,110 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-02-19 20:24:57,663 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 20:24:57,995 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2021-02-19 20:24:58,182 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-02-19 20:24:58,337 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-02-19 20:24:58,523 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-02-19 20:24:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:24:58,764 INFO L93 Difference]: Finished difference Result 15311 states and 50239 transitions. [2021-02-19 20:24:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 20:24:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:24:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:24:58,854 INFO L225 Difference]: With dead ends: 15311 [2021-02-19 20:24:58,854 INFO L226 Difference]: Without dead ends: 15236 [2021-02-19 20:24:58,854 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1408, Invalid=4912, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:24:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2021-02-19 20:24:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 9808. [2021-02-19 20:24:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 9807 states have (on average 3.3470990109105743) internal successors, (32825), 9807 states have internal predecessors, (32825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 32825 transitions. [2021-02-19 20:24:59,030 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 32825 transitions. Word has length 34 [2021-02-19 20:24:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:24:59,031 INFO L480 AbstractCegarLoop]: Abstraction has 9808 states and 32825 transitions. [2021-02-19 20:24:59,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:24:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 32825 transitions. [2021-02-19 20:24:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:24:59,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:24:59,045 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:24:59,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:24:59,267 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:24:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:24:59,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2052131729, now seen corresponding path program 30 times [2021-02-19 20:24:59,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:24:59,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264775096] [2021-02-19 20:24:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:24:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:24:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:24:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264775096] [2021-02-19 20:24:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808368313] [2021-02-19 20:24:59,736 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:24:59,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:24:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:24:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:24:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:00,291 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:25:00,624 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:25:01,076 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-02-19 20:25:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:01,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:01,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:25:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707123977] [2021-02-19 20:25:01,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:01,227 INFO L87 Difference]: Start difference. First operand 9808 states and 32825 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:01,437 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:25:01,653 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:25:02,097 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:25:02,592 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:25:03,012 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 20:25:03,462 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:25:03,854 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:04,087 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:25:04,580 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 20:25:04,784 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:25:05,099 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:25:05,417 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 20:25:05,942 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-02-19 20:25:06,255 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:06,619 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:25:06,968 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 20:25:07,319 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 20:25:07,525 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:25:07,896 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:25:08,158 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 20:25:08,889 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2021-02-19 20:25:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:09,466 INFO L93 Difference]: Finished difference Result 18280 states and 59487 transitions. [2021-02-19 20:25:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 20:25:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:09,508 INFO L225 Difference]: With dead ends: 18280 [2021-02-19 20:25:09,508 INFO L226 Difference]: Without dead ends: 17725 [2021-02-19 20:25:09,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1302, Invalid=5340, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:25:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2021-02-19 20:25:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 9958. [2021-02-19 20:25:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 3.3482976800241038) internal successors, (33339), 9957 states have internal predecessors, (33339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 33339 transitions. [2021-02-19 20:25:09,726 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 33339 transitions. Word has length 34 [2021-02-19 20:25:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:09,726 INFO L480 AbstractCegarLoop]: Abstraction has 9958 states and 33339 transitions. [2021-02-19 20:25:09,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 33339 transitions. [2021-02-19 20:25:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:09,742 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:09,742 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:09,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 20:25:09,943 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:09,943 INFO L82 PathProgramCache]: Analyzing trace with hash 423625651, now seen corresponding path program 31 times [2021-02-19 20:25:09,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:09,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529048958] [2021-02-19 20:25:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529048958] [2021-02-19 20:25:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511438295] [2021-02-19 20:25:10,356 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 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 [2021-02-19 20:25:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:25:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:11,036 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:25:11,388 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:25:11,683 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-02-19 20:25:11,858 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:25:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:12,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:12,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:25:12,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155642256] [2021-02-19 20:25:12,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:12,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:12,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:12,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:12,057 INFO L87 Difference]: Start difference. First operand 9958 states and 33339 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:12,457 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:25:12,890 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:25:13,414 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-02-19 20:25:13,860 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 20:25:14,303 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:25:14,686 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:15,131 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:25:15,591 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-02-19 20:25:15,857 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 20:25:16,253 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-02-19 20:25:16,566 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:25:16,739 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-02-19 20:25:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:18,186 INFO L93 Difference]: Finished difference Result 16297 states and 53481 transitions. [2021-02-19 20:25:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:25:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:18,218 INFO L225 Difference]: With dead ends: 16297 [2021-02-19 20:25:18,218 INFO L226 Difference]: Without dead ends: 15916 [2021-02-19 20:25:18,219 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1044, Invalid=3786, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:25:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2021-02-19 20:25:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 10158. [2021-02-19 20:25:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 10157 states have (on average 3.348921925765482) internal successors, (34015), 10157 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 34015 transitions. [2021-02-19 20:25:18,484 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 34015 transitions. Word has length 34 [2021-02-19 20:25:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:18,484 INFO L480 AbstractCegarLoop]: Abstraction has 10158 states and 34015 transitions. [2021-02-19 20:25:18,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 34015 transitions. [2021-02-19 20:25:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:18,497 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:18,497 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:18,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 20:25:18,702 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 736099063, now seen corresponding path program 32 times [2021-02-19 20:25:18,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:18,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444440822] [2021-02-19 20:25:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:19,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444440822] [2021-02-19 20:25:19,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435832712] [2021-02-19 20:25:19,157 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 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 [2021-02-19 20:25:19,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:19,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:19,617 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:25:19,814 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:25:20,186 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:25:20,565 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:25:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:20,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:20,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-02-19 20:25:20,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509365933] [2021-02-19 20:25:20,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:25:20,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:25:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:25:20,683 INFO L87 Difference]: Start difference. First operand 10158 states and 34015 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:21,630 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 20:25:22,169 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:25:22,750 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:25:23,150 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:25:23,343 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:25:23,659 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 20:25:23,909 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:25:24,252 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-02-19 20:25:24,865 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:25:25,226 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:25:25,471 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-02-19 20:25:25,914 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:26,533 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:25:26,817 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 20:25:27,138 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:27,336 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 20:25:27,594 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:25:27,940 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 20:25:28,346 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 20:25:28,679 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:25:29,027 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 20:25:29,367 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2021-02-19 20:25:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:29,771 INFO L93 Difference]: Finished difference Result 19991 states and 65028 transitions. [2021-02-19 20:25:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 20:25:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:29,816 INFO L225 Difference]: With dead ends: 19991 [2021-02-19 20:25:29,816 INFO L226 Difference]: Without dead ends: 19643 [2021-02-19 20:25:29,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1992, Invalid=6380, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 20:25:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2021-02-19 20:25:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 10332. [2021-02-19 20:25:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10332 states, 10331 states have (on average 3.3502081115090503) internal successors, (34611), 10331 states have internal predecessors, (34611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10332 states to 10332 states and 34611 transitions. [2021-02-19 20:25:30,073 INFO L78 Accepts]: Start accepts. Automaton has 10332 states and 34611 transitions. Word has length 34 [2021-02-19 20:25:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:30,074 INFO L480 AbstractCegarLoop]: Abstraction has 10332 states and 34611 transitions. [2021-02-19 20:25:30,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10332 states and 34611 transitions. [2021-02-19 20:25:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:30,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:30,089 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:30,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 20:25:30,290 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:30,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:30,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1361716345, now seen corresponding path program 33 times [2021-02-19 20:25:30,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:30,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573414335] [2021-02-19 20:25:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573414335] [2021-02-19 20:25:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959454790] [2021-02-19 20:25:30,701 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 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 [2021-02-19 20:25:30,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:25:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:31,618 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:25:31,997 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:25:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:32,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:32,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:25:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534684487] [2021-02-19 20:25:32,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:32,138 INFO L87 Difference]: Start difference. First operand 10332 states and 34611 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:32,773 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:25:33,385 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:25:33,704 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 20:25:33,893 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-02-19 20:25:34,249 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:34,662 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:25:34,967 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:25:35,127 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 20:25:35,427 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 20:25:35,690 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 20:25:36,164 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:25:36,474 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:25:36,764 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:25:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:37,294 INFO L93 Difference]: Finished difference Result 17594 states and 58186 transitions. [2021-02-19 20:25:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:25:37,295 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:37,329 INFO L225 Difference]: With dead ends: 17594 [2021-02-19 20:25:37,329 INFO L226 Difference]: Without dead ends: 17255 [2021-02-19 20:25:37,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1002, Invalid=3554, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:25:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17255 states. [2021-02-19 20:25:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17255 to 11161. [2021-02-19 20:25:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11161 states, 11160 states have (on average 3.3530465949820787) internal successors, (37420), 11160 states have internal predecessors, (37420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37420 transitions. [2021-02-19 20:25:37,543 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37420 transitions. Word has length 34 [2021-02-19 20:25:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:37,543 INFO L480 AbstractCegarLoop]: Abstraction has 11161 states and 37420 transitions. [2021-02-19 20:25:37,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37420 transitions. [2021-02-19 20:25:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:37,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:37,558 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:37,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable509 [2021-02-19 20:25:37,759 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1468776133, now seen corresponding path program 34 times [2021-02-19 20:25:37,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:37,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222005112] [2021-02-19 20:25:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222005112] [2021-02-19 20:25:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456680157] [2021-02-19 20:25:38,200 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 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 [2021-02-19 20:25:38,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:25:38,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:38,917 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 20:25:39,316 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 20:25:39,713 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 20:25:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:39,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:39,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:25:39,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228057147] [2021-02-19 20:25:39,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:39,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:39,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:39,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:39,924 INFO L87 Difference]: Start difference. First operand 11161 states and 37420 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:40,697 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:25:41,229 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:25:41,596 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 20:25:41,793 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-02-19 20:25:41,941 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:25:42,351 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:25:43,040 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:25:43,486 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:25:43,952 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:25:44,405 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 20:25:44,759 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-02-19 20:25:45,025 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 20:25:45,348 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-02-19 20:25:45,640 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-02-19 20:25:45,875 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 20:25:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:46,348 INFO L93 Difference]: Finished difference Result 19490 states and 64468 transitions. [2021-02-19 20:25:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 20:25:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:46,385 INFO L225 Difference]: With dead ends: 19490 [2021-02-19 20:25:46,385 INFO L226 Difference]: Without dead ends: 19142 [2021-02-19 20:25:46,386 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1421, Invalid=5221, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:25:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19142 states. [2021-02-19 20:25:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19142 to 11364. [2021-02-19 20:25:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11364 states, 11363 states have (on average 3.351403678606002) internal successors, (38082), 11363 states have internal predecessors, (38082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 38082 transitions. [2021-02-19 20:25:46,607 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 38082 transitions. Word has length 34 [2021-02-19 20:25:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:46,607 INFO L480 AbstractCegarLoop]: Abstraction has 11364 states and 38082 transitions. [2021-02-19 20:25:46,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 38082 transitions. [2021-02-19 20:25:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:46,621 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:46,621 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:46,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:46,821 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -315329853, now seen corresponding path program 35 times [2021-02-19 20:25:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:46,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776605705] [2021-02-19 20:25:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:47,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776605705] [2021-02-19 20:25:47,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465526351] [2021-02-19 20:25:47,006 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 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 [2021-02-19 20:25:47,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:25:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:25:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:47,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:47,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2021-02-19 20:25:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511909745] [2021-02-19 20:25:47,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:25:47,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:47,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:25:47,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:25:47,275 INFO L87 Difference]: Start difference. First operand 11364 states and 38082 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:47,947 INFO L93 Difference]: Finished difference Result 22280 states and 73862 transitions. [2021-02-19 20:25:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:25:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:47,989 INFO L225 Difference]: With dead ends: 22280 [2021-02-19 20:25:47,989 INFO L226 Difference]: Without dead ends: 22280 [2021-02-19 20:25:47,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22280 states. [2021-02-19 20:25:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22280 to 11571. [2021-02-19 20:25:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11571 states, 11570 states have (on average 3.3495246326707) internal successors, (38754), 11570 states have internal predecessors, (38754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11571 states to 11571 states and 38754 transitions. [2021-02-19 20:25:48,272 INFO L78 Accepts]: Start accepts. Automaton has 11571 states and 38754 transitions. Word has length 34 [2021-02-19 20:25:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:48,272 INFO L480 AbstractCegarLoop]: Abstraction has 11571 states and 38754 transitions. [2021-02-19 20:25:48,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11571 states and 38754 transitions. [2021-02-19 20:25:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:48,286 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:48,286 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:48,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-02-19 20:25:48,486 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -534517053, now seen corresponding path program 36 times [2021-02-19 20:25:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:48,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049801801] [2021-02-19 20:25:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049801801] [2021-02-19 20:25:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175880256] [2021-02-19 20:25:48,637 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 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 [2021-02-19 20:25:48,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:25:48,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:25:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:48,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:48,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 18 [2021-02-19 20:25:48,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783903645] [2021-02-19 20:25:48,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:25:48,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:48,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:25:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:25:48,928 INFO L87 Difference]: Start difference. First operand 11571 states and 38754 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:50,022 INFO L93 Difference]: Finished difference Result 15661 states and 51435 transitions. [2021-02-19 20:25:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 20:25:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:50,050 INFO L225 Difference]: With dead ends: 15661 [2021-02-19 20:25:50,050 INFO L226 Difference]: Without dead ends: 15661 [2021-02-19 20:25:50,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:25:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2021-02-19 20:25:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 4495. [2021-02-19 20:25:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 4494 states have (on average 3.3168669336893637) internal successors, (14906), 4494 states have internal predecessors, (14906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 14906 transitions. [2021-02-19 20:25:50,160 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 14906 transitions. Word has length 34 [2021-02-19 20:25:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:50,160 INFO L480 AbstractCegarLoop]: Abstraction has 4495 states and 14906 transitions. [2021-02-19 20:25:50,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 14906 transitions. [2021-02-19 20:25:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:50,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:50,165 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:50,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:50,366 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash 511365095, now seen corresponding path program 37 times [2021-02-19 20:25:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:50,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979153250] [2021-02-19 20:25:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:50,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979153250] [2021-02-19 20:25:50,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547767234] [2021-02-19 20:25:50,919 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 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 [2021-02-19 20:25:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:51,701 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 20:25:52,271 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:25:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:52,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:52,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:25:52,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906339095] [2021-02-19 20:25:52,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:25:52,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:25:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:25:52,783 INFO L87 Difference]: Start difference. First operand 4495 states and 14906 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:53,820 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 20:25:54,251 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 20:25:54,900 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-02-19 20:25:55,578 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-19 20:25:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:56,595 INFO L93 Difference]: Finished difference Result 6194 states and 19767 transitions. [2021-02-19 20:25:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 20:25:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:56,604 INFO L225 Difference]: With dead ends: 6194 [2021-02-19 20:25:56,604 INFO L226 Difference]: Without dead ends: 6143 [2021-02-19 20:25:56,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=976, Invalid=3854, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:25:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-02-19 20:25:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 4529. [2021-02-19 20:25:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 3.317137809187279) internal successors, (15020), 4528 states have internal predecessors, (15020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 15020 transitions. [2021-02-19 20:25:56,663 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 15020 transitions. Word has length 34 [2021-02-19 20:25:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:56,663 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 15020 transitions. [2021-02-19 20:25:56,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 15020 transitions. [2021-02-19 20:25:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:56,667 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:56,668 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:56,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-02-19 20:25:56,868 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1565534183, now seen corresponding path program 38 times [2021-02-19 20:25:56,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:56,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736579935] [2021-02-19 20:25:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:57,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736579935] [2021-02-19 20:25:57,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588967490] [2021-02-19 20:25:57,349 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 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 [2021-02-19 20:25:57,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:57,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:25:57,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:58,060 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:25:58,484 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:25:58,885 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 20:25:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:58,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:58,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:58,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961860013] [2021-02-19 20:25:58,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:58,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:58,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:58,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:58,990 INFO L87 Difference]: Start difference. First operand 4529 states and 15020 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:59,577 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:25:59,963 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 20:26:00,535 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:26:01,093 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 20:26:01,455 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-02-19 20:26:02,211 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-02-19 20:26:02,801 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:26:03,176 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-02-19 20:26:03,550 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 20:26:03,738 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 20:26:04,367 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 20:26:04,698 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:26:04,952 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:26:05,478 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:26:05,822 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:06,229 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-02-19 20:26:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:06,642 INFO L93 Difference]: Finished difference Result 8533 states and 26925 transitions. [2021-02-19 20:26:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:26:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:06,655 INFO L225 Difference]: With dead ends: 8533 [2021-02-19 20:26:06,655 INFO L226 Difference]: Without dead ends: 8156 [2021-02-19 20:26:06,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1556, Invalid=5250, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:26:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-02-19 20:26:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4594. [2021-02-19 20:26:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 4593 states have (on average 3.3141737426518616) internal successors, (15222), 4593 states have internal predecessors, (15222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 15222 transitions. [2021-02-19 20:26:06,725 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 15222 transitions. Word has length 34 [2021-02-19 20:26:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:06,725 INFO L480 AbstractCegarLoop]: Abstraction has 4594 states and 15222 transitions. [2021-02-19 20:26:06,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 15222 transitions. [2021-02-19 20:26:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:06,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:06,730 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:06,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-02-19 20:26:06,930 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1824003917, now seen corresponding path program 39 times [2021-02-19 20:26:06,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:06,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312882717] [2021-02-19 20:26:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:07,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312882717] [2021-02-19 20:26:07,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764649415] [2021-02-19 20:26:07,470 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 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 [2021-02-19 20:26:07,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:26:07,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:26:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:07,907 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:26:08,316 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:26:08,638 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:26:09,115 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-19 20:26:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:09,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:09,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:26:09,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196451359] [2021-02-19 20:26:09,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:26:09,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:09,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:26:09,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:26:09,207 INFO L87 Difference]: Start difference. First operand 4594 states and 15222 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:09,807 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:26:10,209 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:26:10,784 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:26:11,555 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 20:26:12,162 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-02-19 20:26:12,684 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 20:26:12,869 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:26:13,258 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:26:13,716 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-19 20:26:14,119 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-02-19 20:26:14,499 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:26:14,791 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 20:26:15,159 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 20:26:15,766 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:16,330 WARN L202 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-02-19 20:26:16,534 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-02-19 20:26:16,695 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 20:26:16,916 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 20:26:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:17,541 INFO L93 Difference]: Finished difference Result 9230 states and 29300 transitions. [2021-02-19 20:26:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 20:26:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:17,554 INFO L225 Difference]: With dead ends: 9230 [2021-02-19 20:26:17,554 INFO L226 Difference]: Without dead ends: 8867 [2021-02-19 20:26:17,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1401, Invalid=6255, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:26:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-02-19 20:26:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 4763. [2021-02-19 20:26:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 3.3181436371272572) internal successors, (15801), 4762 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 15801 transitions. [2021-02-19 20:26:17,626 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 15801 transitions. Word has length 34 [2021-02-19 20:26:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:17,627 INFO L480 AbstractCegarLoop]: Abstraction has 4763 states and 15801 transitions. [2021-02-19 20:26:17,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 15801 transitions. [2021-02-19 20:26:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:17,631 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:17,631 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:17,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:17,832 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1752068229, now seen corresponding path program 40 times [2021-02-19 20:26:17,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:17,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664165168] [2021-02-19 20:26:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:18,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664165168] [2021-02-19 20:26:18,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108834372] [2021-02-19 20:26:18,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:26:18,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:26:18,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:26:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:18,760 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:26:19,277 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 20:26:19,589 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:26:19,864 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:20,237 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 20:26:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:20,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:20,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:26:20,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974948031] [2021-02-19 20:26:20,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:26:20,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:26:20,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:26:20,476 INFO L87 Difference]: Start difference. First operand 4763 states and 15801 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:21,165 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-02-19 20:26:21,613 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 20:26:21,960 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-19 20:26:23,107 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 20:26:23,317 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 20:26:23,664 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2021-02-19 20:26:24,000 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 20:26:24,280 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:26:24,555 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2021-02-19 20:26:25,030 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:26:25,247 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:26:25,705 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 20:26:25,907 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-02-19 20:26:26,365 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-02-19 20:26:26,660 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-02-19 20:26:26,826 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 20:26:27,018 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-02-19 20:26:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:27,255 INFO L93 Difference]: Finished difference Result 6810 states and 21741 transitions. [2021-02-19 20:26:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:26:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:27,267 INFO L225 Difference]: With dead ends: 6810 [2021-02-19 20:26:27,267 INFO L226 Difference]: Without dead ends: 6729 [2021-02-19 20:26:27,268 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1297, Invalid=5023, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:26:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-02-19 20:26:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 4745. [2021-02-19 20:26:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4744 states have (on average 3.323566610455312) internal successors, (15767), 4744 states have internal predecessors, (15767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 15767 transitions. [2021-02-19 20:26:27,332 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 15767 transitions. Word has length 34 [2021-02-19 20:26:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:27,333 INFO L480 AbstractCegarLoop]: Abstraction has 4745 states and 15767 transitions. [2021-02-19 20:26:27,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 15767 transitions. [2021-02-19 20:26:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:27,338 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:27,339 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:27,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:27,539 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2012883063, now seen corresponding path program 41 times [2021-02-19 20:26:27,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:27,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077669782] [2021-02-19 20:26:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:28,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077669782] [2021-02-19 20:26:28,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932394807] [2021-02-19 20:26:28,201 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 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 [2021-02-19 20:26:28,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:26:28,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:28,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:26:28,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:29,040 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:26:29,343 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:29,505 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:26:29,793 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:30,216 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:26:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:30,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:30,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:26:30,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557480763] [2021-02-19 20:26:30,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:26:30,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:26:30,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:26:30,442 INFO L87 Difference]: Start difference. First operand 4745 states and 15767 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:31,754 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2021-02-19 20:26:31,966 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2021-02-19 20:26:32,650 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-02-19 20:26:32,895 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-02-19 20:26:33,223 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-02-19 20:26:33,627 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 28 [2021-02-19 20:26:34,133 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-02-19 20:26:34,376 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 20:26:34,549 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 20:26:34,927 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:26:35,217 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:26:35,745 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-02-19 20:26:36,207 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-02-19 20:26:36,482 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:26:36,714 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-02-19 20:26:36,992 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 20:26:37,270 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 20:26:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:37,346 INFO L93 Difference]: Finished difference Result 7630 states and 24453 transitions. [2021-02-19 20:26:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 20:26:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:37,357 INFO L225 Difference]: With dead ends: 7630 [2021-02-19 20:26:37,357 INFO L226 Difference]: Without dead ends: 7555 [2021-02-19 20:26:37,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1217, Invalid=4483, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 20:26:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7555 states. [2021-02-19 20:26:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7555 to 4865. [2021-02-19 20:26:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 3.3283305921052633) internal successors, (16189), 4864 states have internal predecessors, (16189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 16189 transitions. [2021-02-19 20:26:37,422 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 16189 transitions. Word has length 34 [2021-02-19 20:26:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:37,422 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 16189 transitions. [2021-02-19 20:26:37,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 16189 transitions. [2021-02-19 20:26:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:37,427 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:37,427 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:37,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable635,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:37,627 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:37,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1855799415, now seen corresponding path program 42 times [2021-02-19 20:26:37,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:37,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862681190] [2021-02-19 20:26:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862681190] [2021-02-19 20:26:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775806261] [2021-02-19 20:26:38,103 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 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 [2021-02-19 20:26:38,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:26:38,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:26:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:38,569 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:26:39,002 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:26:39,295 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:26:39,738 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 20:26:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:39,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:39,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:26:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903159135] [2021-02-19 20:26:39,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:39,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:39,885 INFO L87 Difference]: Start difference. First operand 4865 states and 16189 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:40,660 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 20:26:40,890 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 20:26:41,130 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 20:26:41,644 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 20:26:41,819 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:26:42,446 WARN L202 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 20:26:42,797 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:26:43,213 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-02-19 20:26:43,612 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:26:44,069 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:26:44,415 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:26:44,643 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:26:44,985 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:26:45,248 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:26:45,663 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 20:26:45,886 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 30 [2021-02-19 20:26:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:46,483 INFO L93 Difference]: Finished difference Result 9314 states and 29855 transitions. [2021-02-19 20:26:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 20:26:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:46,495 INFO L225 Difference]: With dead ends: 9314 [2021-02-19 20:26:46,496 INFO L226 Difference]: Without dead ends: 8901 [2021-02-19 20:26:46,496 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=889, Invalid=3803, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:26:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2021-02-19 20:26:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 4749. [2021-02-19 20:26:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4748 states have (on average 3.3241364785172705) internal successors, (15783), 4748 states have internal predecessors, (15783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 15783 transitions. [2021-02-19 20:26:46,565 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 15783 transitions. Word has length 34 [2021-02-19 20:26:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:46,565 INFO L480 AbstractCegarLoop]: Abstraction has 4749 states and 15783 transitions. [2021-02-19 20:26:46,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 15783 transitions. [2021-02-19 20:26:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:46,570 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:46,570 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:46,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-02-19 20:26:46,770 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 853042919, now seen corresponding path program 43 times [2021-02-19 20:26:46,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:46,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122369405] [2021-02-19 20:26:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122369405] [2021-02-19 20:26:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888334761] [2021-02-19 20:26:47,233 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 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 [2021-02-19 20:26:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:26:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:48,075 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:26:48,383 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 20:26:48,556 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:26:48,715 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:26:48,997 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 20:26:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:49,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:49,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:26:49,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432252127] [2021-02-19 20:26:49,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:26:49,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:26:49,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:26:49,073 INFO L87 Difference]: Start difference. First operand 4749 states and 15783 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:49,747 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2021-02-19 20:26:49,946 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 20:26:50,314 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 20:26:50,500 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 20:26:50,941 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:26:51,498 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-02-19 20:26:51,819 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:26:52,801 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-02-19 20:26:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:53,128 INFO L93 Difference]: Finished difference Result 6107 states and 19749 transitions. [2021-02-19 20:26:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:26:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:53,137 INFO L225 Difference]: With dead ends: 6107 [2021-02-19 20:26:53,137 INFO L226 Difference]: Without dead ends: 6035 [2021-02-19 20:26:53,137 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=654, Invalid=2886, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:26:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6035 states. [2021-02-19 20:26:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6035 to 4777. [2021-02-19 20:26:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.3239112227805694) internal successors, (15875), 4776 states have internal predecessors, (15875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 15875 transitions. [2021-02-19 20:26:53,195 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 15875 transitions. Word has length 34 [2021-02-19 20:26:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:53,196 INFO L480 AbstractCegarLoop]: Abstraction has 4777 states and 15875 transitions. [2021-02-19 20:26:53,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 15875 transitions. [2021-02-19 20:26:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:53,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:53,200 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:53,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-02-19 20:26:53,401 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash 633855719, now seen corresponding path program 44 times [2021-02-19 20:26:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:53,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185487001] [2021-02-19 20:26:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185487001] [2021-02-19 20:26:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675072484] [2021-02-19 20:26:53,921 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 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 [2021-02-19 20:26:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:26:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:54,390 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:26:54,743 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:26:55,057 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 20:26:55,235 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:26:55,753 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 20:26:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:55,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:55,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:26:55,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966841645] [2021-02-19 20:26:55,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:26:55,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:26:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:26:55,861 INFO L87 Difference]: Start difference. First operand 4777 states and 15875 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:57,129 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:26:57,305 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2021-02-19 20:26:57,647 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 20:26:57,984 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:26:58,423 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 20:26:58,771 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:26:59,032 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32 [2021-02-19 20:26:59,389 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:26:59,650 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2021-02-19 20:27:00,218 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-02-19 20:27:00,773 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-02-19 20:27:01,130 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:27:01,459 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:27:01,642 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2021-02-19 20:27:02,035 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-02-19 20:27:02,478 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-02-19 20:27:02,972 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:27:03,389 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-02-19 20:27:03,852 WARN L202 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 20:27:04,418 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:27:04,749 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:27:05,061 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:27:05,540 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:27:05,996 WARN L202 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:27:06,421 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:27:06,574 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 20:27:06,960 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 25 [2021-02-19 20:27:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:07,496 INFO L93 Difference]: Finished difference Result 9037 states and 28848 transitions. [2021-02-19 20:27:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 20:27:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:07,508 INFO L225 Difference]: With dead ends: 9037 [2021-02-19 20:27:07,508 INFO L226 Difference]: Without dead ends: 8660 [2021-02-19 20:27:07,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1783, Invalid=5873, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:27:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-02-19 20:27:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 4935. [2021-02-19 20:27:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 3.330563437373328) internal successors, (16433), 4934 states have internal predecessors, (16433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 16433 transitions. [2021-02-19 20:27:07,578 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 16433 transitions. Word has length 34 [2021-02-19 20:27:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:07,579 INFO L480 AbstractCegarLoop]: Abstraction has 4935 states and 16433 transitions. [2021-02-19 20:27:07,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 16433 transitions. [2021-02-19 20:27:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:07,585 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:07,585 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:07,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-02-19 20:27:07,785 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1342437845, now seen corresponding path program 45 times [2021-02-19 20:27:07,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:07,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4616926] [2021-02-19 20:27:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4616926] [2021-02-19 20:27:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733890243] [2021-02-19 20:27:08,321 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 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 [2021-02-19 20:27:08,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:27:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:08,808 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:27:09,179 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:09,499 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 20:27:09,959 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 20:27:10,189 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 20:27:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:10,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:10,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-02-19 20:27:10,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609674255] [2021-02-19 20:27:10,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:27:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:10,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:27:10,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:27:10,314 INFO L87 Difference]: Start difference. First operand 4935 states and 16433 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:11,718 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:27:11,910 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-02-19 20:27:12,287 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 20:27:12,622 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 20:27:13,170 WARN L202 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-19 20:27:13,471 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2021-02-19 20:27:13,841 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:27:14,322 WARN L202 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-19 20:27:14,918 WARN L202 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 20:27:15,349 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 20:27:15,976 WARN L202 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 20:27:16,431 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:27:16,888 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-02-19 20:27:17,401 WARN L202 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:27:17,700 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 20:27:17,876 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2021-02-19 20:27:18,087 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 24 [2021-02-19 20:27:18,308 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 20:27:18,522 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2021-02-19 20:27:18,693 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 26 [2021-02-19 20:27:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:19,077 INFO L93 Difference]: Finished difference Result 8732 states and 28120 transitions. [2021-02-19 20:27:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:27:19,078 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:19,089 INFO L225 Difference]: With dead ends: 8732 [2021-02-19 20:27:19,089 INFO L226 Difference]: Without dead ends: 8236 [2021-02-19 20:27:19,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1041, Invalid=3929, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:27:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-02-19 20:27:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 5049. [2021-02-19 20:27:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.3333993660855783) internal successors, (16827), 5048 states have internal predecessors, (16827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 16827 transitions. [2021-02-19 20:27:19,169 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 16827 transitions. Word has length 34 [2021-02-19 20:27:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:19,169 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 16827 transitions. [2021-02-19 20:27:19,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 16827 transitions. [2021-02-19 20:27:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:19,174 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:19,174 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:19,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-02-19 20:27:19,374 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -329467213, now seen corresponding path program 46 times [2021-02-19 20:27:19,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:19,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338421323] [2021-02-19 20:27:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:19,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338421323] [2021-02-19 20:27:19,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192206376] [2021-02-19 20:27:19,963 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 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 [2021-02-19 20:27:19,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:27:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:27:19,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:20,825 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:21,329 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-02-19 20:27:21,880 WARN L202 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:27:22,041 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 20:27:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:22,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:22,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:27:22,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686083965] [2021-02-19 20:27:22,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:27:22,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:27:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:27:22,136 INFO L87 Difference]: Start difference. First operand 5049 states and 16827 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:22,752 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-02-19 20:27:22,974 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2021-02-19 20:27:23,297 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 20:27:23,829 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:27:24,738 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:27:25,177 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-02-19 20:27:25,786 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:27:26,242 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-02-19 20:27:26,844 WARN L202 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:27:27,092 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-02-19 20:27:27,412 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-02-19 20:27:27,645 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2021-02-19 20:27:27,856 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-02-19 20:27:28,113 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 20:27:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:28,934 INFO L93 Difference]: Finished difference Result 9354 states and 30206 transitions. [2021-02-19 20:27:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:27:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:28,948 INFO L225 Difference]: With dead ends: 9354 [2021-02-19 20:27:28,948 INFO L226 Difference]: Without dead ends: 8950 [2021-02-19 20:27:28,948 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:27:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-02-19 20:27:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 5063. [2021-02-19 20:27:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 3.331291979454761) internal successors, (16863), 5062 states have internal predecessors, (16863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 16863 transitions. [2021-02-19 20:27:29,028 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 16863 transitions. Word has length 34 [2021-02-19 20:27:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:29,028 INFO L480 AbstractCegarLoop]: Abstraction has 5063 states and 16863 transitions. [2021-02-19 20:27:29,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 16863 transitions. [2021-02-19 20:27:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:29,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:29,033 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:29,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:29,233 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash 49938551, now seen corresponding path program 47 times [2021-02-19 20:27:29,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:29,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503924037] [2021-02-19 20:27:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:29,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503924037] [2021-02-19 20:27:29,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677137026] [2021-02-19 20:27:29,707 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 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 [2021-02-19 20:27:29,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:27:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:29,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:27:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:30,449 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:30,605 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 20:27:31,127 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 20:27:31,313 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:27:31,648 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:27:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:31,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:31,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:27:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431647812] [2021-02-19 20:27:31,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:27:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:27:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:27:31,729 INFO L87 Difference]: Start difference. First operand 5063 states and 16863 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:32,367 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2021-02-19 20:27:32,720 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-02-19 20:27:33,018 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 20:27:33,439 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-02-19 20:27:33,801 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:27:34,081 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 20:27:34,329 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 20:27:34,776 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 20:27:35,315 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2021-02-19 20:27:36,030 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 20:27:36,395 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:27:36,801 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 20:27:37,143 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:27:37,353 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-19 20:27:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:37,594 INFO L93 Difference]: Finished difference Result 8127 states and 26353 transitions. [2021-02-19 20:27:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:27:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:37,607 INFO L225 Difference]: With dead ends: 8127 [2021-02-19 20:27:37,607 INFO L226 Difference]: Without dead ends: 8055 [2021-02-19 20:27:37,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=758, Invalid=3402, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:27:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-02-19 20:27:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 5605. [2021-02-19 20:27:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 5604 states have (on average 3.3345824411134903) internal successors, (18687), 5604 states have internal predecessors, (18687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 18687 transitions. [2021-02-19 20:27:37,682 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 18687 transitions. Word has length 34 [2021-02-19 20:27:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:37,682 INFO L480 AbstractCegarLoop]: Abstraction has 5605 states and 18687 transitions. [2021-02-19 20:27:37,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 18687 transitions. [2021-02-19 20:27:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:37,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:37,688 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:37,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable713 [2021-02-19 20:27:37,888 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:37,889 INFO L82 PathProgramCache]: Analyzing trace with hash -169248649, now seen corresponding path program 48 times [2021-02-19 20:27:37,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:37,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212975753] [2021-02-19 20:27:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:38,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212975753] [2021-02-19 20:27:38,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442621306] [2021-02-19 20:27:38,434 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 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 [2021-02-19 20:27:38,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:27:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:38,973 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:27:39,255 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:39,424 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 20:27:39,578 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:27:39,930 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:27:40,502 WARN L202 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 20:27:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:40,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:40,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:27:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457134956] [2021-02-19 20:27:40,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:27:40,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:27:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:27:40,623 INFO L87 Difference]: Start difference. First operand 5605 states and 18687 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:41,129 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-02-19 20:27:41,658 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 20:27:41,965 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 20:27:42,455 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:27:42,686 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2021-02-19 20:27:42,986 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-02-19 20:27:43,336 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 20:27:43,798 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-02-19 20:27:44,177 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:27:44,679 WARN L202 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-02-19 20:27:44,880 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:27:45,372 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-02-19 20:27:45,687 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-02-19 20:27:46,199 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:27:46,570 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 20:27:46,886 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 20:27:47,327 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-02-19 20:27:47,786 WARN L202 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:27:48,076 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:27:48,538 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-02-19 20:27:49,276 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:27:49,862 WARN L202 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-02-19 20:27:50,211 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-02-19 20:27:50,677 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:27:51,173 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:27:51,333 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2021-02-19 20:27:51,662 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-02-19 20:27:52,027 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2021-02-19 20:27:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:52,584 INFO L93 Difference]: Finished difference Result 10197 states and 32646 transitions. [2021-02-19 20:27:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:27:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:52,605 INFO L225 Difference]: With dead ends: 10197 [2021-02-19 20:27:52,605 INFO L226 Difference]: Without dead ends: 9791 [2021-02-19 20:27:52,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1370, Invalid=5110, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:27:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2021-02-19 20:27:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 5956. [2021-02-19 20:27:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5955 states have (on average 3.339378673383711) internal successors, (19886), 5955 states have internal predecessors, (19886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 19886 transitions. [2021-02-19 20:27:52,717 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 19886 transitions. Word has length 34 [2021-02-19 20:27:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:52,717 INFO L480 AbstractCegarLoop]: Abstraction has 5956 states and 19886 transitions. [2021-02-19 20:27:52,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 19886 transitions. [2021-02-19 20:27:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:52,724 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:52,724 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:52,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:52,925 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 376109243, now seen corresponding path program 49 times [2021-02-19 20:27:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:52,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748278116] [2021-02-19 20:27:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:53,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748278116] [2021-02-19 20:27:53,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408581665] [2021-02-19 20:27:53,601 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 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 [2021-02-19 20:27:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:54,271 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:27:54,694 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:27:55,092 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 20:27:55,300 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:27:55,659 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:27:56,182 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:27:56,364 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:27:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:56,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:56,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:27:56,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110412394] [2021-02-19 20:27:56,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:27:56,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:56,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:27:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:27:56,464 INFO L87 Difference]: Start difference. First operand 5956 states and 19886 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:57,014 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 20:27:57,424 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 29 [2021-02-19 20:27:57,663 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:27:57,846 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 20:27:58,050 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 20:27:58,353 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 20:27:58,685 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:27:58,957 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-02-19 20:27:59,185 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2021-02-19 20:27:59,385 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 20:27:59,929 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 20:28:00,338 WARN L202 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:28:00,571 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 20:28:00,986 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:28:01,461 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:28:02,161 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 20:28:02,375 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-02-19 20:28:02,549 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-02-19 20:28:03,022 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 20:28:03,471 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:28:03,818 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:28:04,224 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:28:04,628 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:28:04,939 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:28:05,594 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 20:28:05,882 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2021-02-19 20:28:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:06,004 INFO L93 Difference]: Finished difference Result 8631 states and 27922 transitions. [2021-02-19 20:28:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 20:28:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:06,018 INFO L225 Difference]: With dead ends: 8631 [2021-02-19 20:28:06,019 INFO L226 Difference]: Without dead ends: 8556 [2021-02-19 20:28:06,019 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1319, Invalid=4687, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 20:28:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-02-19 20:28:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6002. [2021-02-19 20:28:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6002 states, 6001 states have (on average 3.341109815030828) internal successors, (20050), 6001 states have internal predecessors, (20050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6002 states to 6002 states and 20050 transitions. [2021-02-19 20:28:06,107 INFO L78 Accepts]: Start accepts. Automaton has 6002 states and 20050 transitions. Word has length 34 [2021-02-19 20:28:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:06,107 INFO L480 AbstractCegarLoop]: Abstraction has 6002 states and 20050 transitions. [2021-02-19 20:28:06,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6002 states and 20050 transitions. [2021-02-19 20:28:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:06,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:06,113 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:06,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-02-19 20:28:06,314 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 219025595, now seen corresponding path program 50 times [2021-02-19 20:28:06,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:06,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382257058] [2021-02-19 20:28:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:06,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382257058] [2021-02-19 20:28:06,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699532191] [2021-02-19 20:28:06,898 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 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 [2021-02-19 20:28:06,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:28:06,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:06,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:28:06,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:07,584 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:28:08,018 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:28:08,425 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:28:09,024 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:28:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:09,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:09,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:28:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44038709] [2021-02-19 20:28:09,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:28:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:28:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:28:09,175 INFO L87 Difference]: Start difference. First operand 6002 states and 20050 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:09,696 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 20:28:10,149 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:28:10,427 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 20:28:10,631 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 20:28:11,065 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:28:11,272 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 20:28:11,873 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 20:28:12,114 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 20:28:13,022 WARN L202 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:13,678 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 20:28:14,158 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:28:14,673 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:28:15,044 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:28:15,612 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:28:16,141 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:28:16,804 WARN L202 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:28:17,054 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 20:28:17,290 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 20:28:17,588 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2021-02-19 20:28:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:18,088 INFO L93 Difference]: Finished difference Result 11278 states and 36638 transitions. [2021-02-19 20:28:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:28:18,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:18,108 INFO L225 Difference]: With dead ends: 11278 [2021-02-19 20:28:18,108 INFO L226 Difference]: Without dead ends: 10939 [2021-02-19 20:28:18,109 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=949, Invalid=3607, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:28:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10939 states. [2021-02-19 20:28:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 5980. [2021-02-19 20:28:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.3400234152868373) internal successors, (19970), 5979 states have internal predecessors, (19970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 19970 transitions. [2021-02-19 20:28:18,210 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 19970 transitions. Word has length 34 [2021-02-19 20:28:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:18,210 INFO L480 AbstractCegarLoop]: Abstraction has 5980 states and 19970 transitions. [2021-02-19 20:28:18,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 19970 transitions. [2021-02-19 20:28:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:18,217 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:18,217 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:18,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-02-19 20:28:18,417 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1814304691, now seen corresponding path program 51 times [2021-02-19 20:28:18,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:18,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927420673] [2021-02-19 20:28:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:19,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927420673] [2021-02-19 20:28:19,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102366449] [2021-02-19 20:28:19,281 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 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 [2021-02-19 20:28:19,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:28:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:28:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:20,190 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:28:20,534 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 20:28:21,019 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 20:28:21,696 WARN L202 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 20:28:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:21,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:21,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2021-02-19 20:28:21,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576366200] [2021-02-19 20:28:21,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:28:21,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:21,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:28:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:28:21,895 INFO L87 Difference]: Start difference. First operand 5980 states and 19970 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:22,315 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 20:28:22,931 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 20:28:23,640 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 20:28:23,874 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:28:24,704 WARN L202 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-02-19 20:28:25,353 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2021-02-19 20:28:25,498 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 20:28:26,191 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 20:28:26,620 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 20:28:26,833 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 20:28:27,453 WARN L202 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-02-19 20:28:28,033 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-02-19 20:28:28,640 WARN L202 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:28,863 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 20:28:29,077 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 20:28:29,268 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-02-19 20:28:29,449 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:28:29,637 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:28:30,163 WARN L202 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:28:30,814 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 20:28:31,349 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 20:28:31,985 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:28:32,307 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 20:28:32,641 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 20:28:33,148 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:28:33,959 WARN L202 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:34,882 WARN L202 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:28:35,195 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 20:28:35,636 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 20:28:36,328 WARN L202 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:37,421 WARN L202 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 20:28:38,279 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:28:38,735 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:28:39,218 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:28:40,256 WARN L202 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:40,991 WARN L202 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:28:41,556 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:28:42,267 WARN L202 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:28:42,479 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-02-19 20:28:43,204 WARN L202 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-02-19 20:28:43,481 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2021-02-19 20:28:43,733 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 20:28:44,022 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-02-19 20:28:44,327 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2021-02-19 20:28:44,881 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:28:45,189 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-02-19 20:28:45,445 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 20:28:46,035 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 20:28:46,345 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:28:46,507 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 20:28:46,776 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 20:28:46,987 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-02-19 20:28:47,198 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 20:28:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:47,438 INFO L93 Difference]: Finished difference Result 13162 states and 41782 transitions. [2021-02-19 20:28:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-02-19 20:28:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:47,461 INFO L225 Difference]: With dead ends: 13162 [2021-02-19 20:28:47,461 INFO L226 Difference]: Without dead ends: 12564 [2021-02-19 20:28:47,462 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6910 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=3226, Invalid=15680, Unknown=0, NotChecked=0, Total=18906 [2021-02-19 20:28:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2021-02-19 20:28:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 6510. [2021-02-19 20:28:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6510 states, 6509 states have (on average 3.347979720387156) internal successors, (21792), 6509 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6510 states to 6510 states and 21792 transitions. [2021-02-19 20:28:47,581 INFO L78 Accepts]: Start accepts. Automaton has 6510 states and 21792 transitions. Word has length 34 [2021-02-19 20:28:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:47,582 INFO L480 AbstractCegarLoop]: Abstraction has 6510 states and 21792 transitions. [2021-02-19 20:28:47,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6510 states and 21792 transitions. [2021-02-19 20:28:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:47,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:47,589 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:47,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:47,790 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -331475081, now seen corresponding path program 52 times [2021-02-19 20:28:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:47,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84647726] [2021-02-19 20:28:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84647726] [2021-02-19 20:28:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647921406] [2021-02-19 20:28:48,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:28:48,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:28:48,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:28:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:49,626 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:28:50,074 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:28:50,636 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:28:50,934 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:28:51,467 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:28:52,200 WARN L202 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:28:52,468 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:28:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:52,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:52,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 20:28:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051968872] [2021-02-19 20:28:52,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:28:52,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:28:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:28:52,648 INFO L87 Difference]: Start difference. First operand 6510 states and 21792 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:53,213 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 20:28:53,808 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:28:54,180 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 20:28:54,387 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 21 [2021-02-19 20:28:54,767 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 20:28:55,143 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:28:55,341 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-02-19 20:28:55,985 WARN L202 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 20:28:56,283 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 20:28:56,676 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-02-19 20:28:56,954 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-19 20:28:57,267 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:28:57,998 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2021-02-19 20:28:58,835 WARN L202 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 20:28:59,131 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:28:59,597 WARN L202 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 20:29:00,126 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:29:00,302 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 20:29:00,881 WARN L202 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-02-19 20:29:01,180 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2021-02-19 20:29:01,494 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 26 [2021-02-19 20:29:01,719 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2021-02-19 20:29:01,894 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:29:02,085 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:29:02,709 WARN L202 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:29:03,269 WARN L202 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 20:29:03,745 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-02-19 20:29:04,026 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-02-19 20:29:04,262 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-02-19 20:29:04,435 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 20:29:04,935 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-02-19 20:29:05,499 WARN L202 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 20:29:06,112 WARN L202 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 20:29:06,306 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 20:29:06,926 WARN L202 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-02-19 20:29:07,645 WARN L202 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 20:29:08,405 WARN L202 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-02-19 20:29:08,927 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-02-19 20:29:09,470 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 20:29:09,670 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 20:29:10,190 WARN L202 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-02-19 20:29:10,828 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 20:29:11,128 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:29:11,715 WARN L202 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:29:12,084 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:29:13,042 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:29:13,469 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2021-02-19 20:29:13,796 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2021-02-19 20:29:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:14,181 INFO L93 Difference]: Finished difference Result 11860 states and 38152 transitions. [2021-02-19 20:29:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-02-19 20:29:14,184 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:14,207 INFO L225 Difference]: With dead ends: 11860 [2021-02-19 20:29:14,207 INFO L226 Difference]: Without dead ends: 11779 [2021-02-19 20:29:14,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=2503, Invalid=10607, Unknown=0, NotChecked=0, Total=13110 [2021-02-19 20:29:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11779 states. [2021-02-19 20:29:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11779 to 6529. [2021-02-19 20:29:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 3.3514093137254903) internal successors, (21878), 6528 states have internal predecessors, (21878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 21878 transitions. [2021-02-19 20:29:14,328 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 21878 transitions. Word has length 34 [2021-02-19 20:29:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:14,328 INFO L480 AbstractCegarLoop]: Abstraction has 6529 states and 21878 transitions. [2021-02-19 20:29:14,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 21878 transitions. [2021-02-19 20:29:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:14,336 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:14,336 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:14,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-02-19 20:29:14,537 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:14,537 INFO L82 PathProgramCache]: Analyzing trace with hash -488558729, now seen corresponding path program 53 times [2021-02-19 20:29:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:14,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905018152] [2021-02-19 20:29:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905018152] [2021-02-19 20:29:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715830944] [2021-02-19 20:29:15,442 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 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 [2021-02-19 20:29:15,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:29:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:29:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:16,081 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:29:16,609 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:29:17,136 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:29:17,711 WARN L202 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:29:18,557 WARN L202 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:29:18,827 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:29:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:18,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:18,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:29:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096018334] [2021-02-19 20:29:18,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:29:18,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:18,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:29:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:29:18,981 INFO L87 Difference]: Start difference. First operand 6529 states and 21878 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:19,392 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 20:29:20,089 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 20:29:20,514 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 20:29:20,796 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:29:21,537 WARN L202 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 20:29:22,093 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-02-19 20:29:22,417 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:29:22,887 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-02-19 20:29:23,604 WARN L202 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-02-19 20:29:24,055 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 20:29:24,911 WARN L202 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:29:25,245 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 26 [2021-02-19 20:29:25,453 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:29:25,681 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:29:26,288 WARN L202 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:29:26,865 WARN L202 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 20:29:27,145 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 20:29:27,424 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-02-19 20:29:27,874 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-02-19 20:29:28,092 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 20:29:28,687 WARN L202 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:29:29,459 WARN L202 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:29:30,327 WARN L202 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-02-19 20:29:31,132 WARN L202 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:29:31,884 WARN L202 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-02-19 20:29:32,245 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 20:29:32,460 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 20:29:32,977 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2021-02-19 20:29:33,301 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2021-02-19 20:29:33,637 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2021-02-19 20:29:34,411 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 20:29:34,641 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-02-19 20:29:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:34,783 INFO L93 Difference]: Finished difference Result 12156 states and 39618 transitions. [2021-02-19 20:29:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:29:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:34,807 INFO L225 Difference]: With dead ends: 12156 [2021-02-19 20:29:34,807 INFO L226 Difference]: Without dead ends: 11853 [2021-02-19 20:29:34,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1312, Invalid=5494, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:29:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11853 states. [2021-02-19 20:29:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11853 to 6507. [2021-02-19 20:29:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.3489086996618505) internal successors, (21788), 6506 states have internal predecessors, (21788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21788 transitions. [2021-02-19 20:29:34,927 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21788 transitions. Word has length 34 [2021-02-19 20:29:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:34,928 INFO L480 AbstractCegarLoop]: Abstraction has 6507 states and 21788 transitions. [2021-02-19 20:29:34,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21788 transitions. [2021-02-19 20:29:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:29:34,936 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:34,936 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:35,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:35,136 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash -108153235, now seen corresponding path program 54 times [2021-02-19 20:29:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:35,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048823351] [2021-02-19 20:29:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:35,712 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 20:29:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:36,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048823351] [2021-02-19 20:29:36,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872765215] [2021-02-19 20:29:36,417 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 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 [2021-02-19 20:29:36,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:29:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:36,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:29:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:37,086 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:29:37,656 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 20:29:38,331 WARN L202 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-19 20:29:38,805 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:29:39,776 WARN L202 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-02-19 20:29:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:39,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:39,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-02-19 20:29:39,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51701120] [2021-02-19 20:29:39,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:29:39,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:29:39,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:29:39,982 INFO L87 Difference]: Start difference. First operand 6507 states and 21788 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:40,362 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 14 [2021-02-19 20:29:40,782 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 20:29:41,052 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 20:29:41,627 WARN L202 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-02-19 20:29:41,906 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 20:29:42,114 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2021-02-19 20:29:42,409 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 20:29:42,719 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-02-19 20:29:43,003 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:29:43,496 WARN L202 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-02-19 20:29:43,670 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 12 [2021-02-19 20:29:44,329 WARN L202 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-02-19 20:29:44,638 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 20:29:44,892 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 20:29:45,404 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:29:46,113 WARN L202 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-02-19 20:29:46,318 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:29:46,528 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 20:29:46,772 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 20:29:47,051 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 20:29:47,261 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-02-19 20:29:47,506 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 20:29:48,023 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:29:48,222 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 20:29:48,867 WARN L202 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-02-19 20:29:49,789 WARN L202 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-02-19 20:29:50,006 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 20:29:50,198 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-02-19 20:29:50,450 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 20:29:50,830 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 20:29:51,199 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 20:29:51,442 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:29:52,151 WARN L202 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:29:52,786 WARN L202 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-02-19 20:29:53,605 WARN L202 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2021-02-19 20:29:54,443 WARN L202 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-02-19 20:29:54,740 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-02-19 20:29:55,138 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-02-19 20:29:55,491 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 20:29:56,070 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-02-19 20:29:56,813 WARN L202 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 20:29:57,088 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:29:57,337 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 20:29:57,560 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-02-19 20:29:57,765 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-02-19 20:29:58,101 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 20:29:58,297 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:29:59,314 WARN L202 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-19 20:30:00,159 WARN L202 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-02-19 20:30:01,090 WARN L202 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-02-19 20:30:01,664 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 20:30:03,005 WARN L202 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-19 20:30:03,287 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2021-02-19 20:30:03,926 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 33 [2021-02-19 20:30:04,305 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 20:30:04,681 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 20:30:05,030 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:30:05,462 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 20:30:05,667 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:30:05,955 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-02-19 20:30:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:06,082 INFO L93 Difference]: Finished difference Result 10097 states and 32246 transitions. [2021-02-19 20:30:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-02-19 20:30:06,085 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:30:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:06,103 INFO L225 Difference]: With dead ends: 10097 [2021-02-19 20:30:06,103 INFO L226 Difference]: Without dead ends: 9746 [2021-02-19 20:30:06,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=2042, Invalid=9730, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 20:30:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9746 states. [2021-02-19 20:30:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9746 to 7445. [2021-02-19 20:30:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.355722729715207) internal successors, (24980), 7444 states have internal predecessors, (24980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 24980 transitions. [2021-02-19 20:30:06,224 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 24980 transitions. Word has length 36 [2021-02-19 20:30:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:06,224 INFO L480 AbstractCegarLoop]: Abstraction has 7445 states and 24980 transitions. [2021-02-19 20:30:06,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 24980 transitions. [2021-02-19 20:30:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:30:06,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:06,236 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:30:06,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-02-19 20:30:06,437 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1263147499, now seen corresponding path program 55 times [2021-02-19 20:30:06,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:06,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765979947] [2021-02-19 20:30:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:07,164 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 20:30:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:08,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765979947] [2021-02-19 20:30:08,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676707359] [2021-02-19 20:30:08,031 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 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 [2021-02-19 20:30:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:30:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:08,644 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:30:09,166 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 20:30:09,641 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 20:30:09,960 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:30:10,239 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:30:10,690 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:30:11,188 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-02-19 20:30:11,606 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 20:30:12,121 WARN L202 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-02-19 20:30:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:12,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 20:30:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984006406] [2021-02-19 20:30:12,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 20:30:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 20:30:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 20:30:12,294 INFO L87 Difference]: Start difference. First operand 7445 states and 24980 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:12,960 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 14 [2021-02-19 20:30:13,203 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 20:30:13,572 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 20:30:13,883 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 20:30:14,143 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2021-02-19 20:30:14,668 WARN L202 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-02-19 20:30:14,944 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 20:30:15,201 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2021-02-19 20:30:15,765 WARN L202 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-02-19 20:30:16,064 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 20:30:16,411 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-02-19 20:30:16,718 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2021-02-19 20:30:17,073 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:30:17,618 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-02-19 20:30:17,806 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 12 [2021-02-19 20:30:18,215 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2021-02-19 20:30:18,492 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 20:30:18,987 WARN L202 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:30:19,177 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:30:19,572 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-02-19 20:30:19,820 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 20:30:20,187 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-02-19 20:30:20,500 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2021-02-19 20:30:20,871 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-02-19 20:30:22,139 WARN L202 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-02-19 20:30:22,353 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:30:22,772 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2021-02-19 20:30:23,141 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 20:30:23,359 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 20 [2021-02-19 20:30:23,625 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2021-02-19 20:30:23,936 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-02-19 20:30:24,229 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:30:24,867 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-02-19 20:30:25,451 WARN L202 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-02-19 20:30:25,951 WARN L202 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:30:26,777 WARN L202 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-02-19 20:30:27,185 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2021-02-19 20:30:27,386 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 20:30:27,987 WARN L202 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-02-19 20:30:29,112 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2021-02-19 20:30:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:29,304 INFO L93 Difference]: Finished difference Result 9464 states and 30542 transitions. [2021-02-19 20:30:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:30:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:30:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:29,325 INFO L225 Difference]: With dead ends: 9464 [2021-02-19 20:30:29,326 INFO L226 Difference]: Without dead ends: 9434 [2021-02-19 20:30:29,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1424, Invalid=6766, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 20:30:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-02-19 20:30:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 7528. [2021-02-19 20:30:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7528 states, 7527 states have (on average 3.3549887073203135) internal successors, (25253), 7527 states have internal predecessors, (25253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 25253 transitions. [2021-02-19 20:30:29,449 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 25253 transitions. Word has length 36 [2021-02-19 20:30:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:29,449 INFO L480 AbstractCegarLoop]: Abstraction has 7528 states and 25253 transitions. [2021-02-19 20:30:29,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 25253 transitions. [2021-02-19 20:30:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:30:29,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:29,459 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:30:29,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable835 [2021-02-19 20:30:29,660 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash -208978411, now seen corresponding path program 56 times [2021-02-19 20:30:29,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:29,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225106909] [2021-02-19 20:30:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:30,136 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 20:30:30,312 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 20:30:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:31,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225106909] [2021-02-19 20:30:31,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769691626] [2021-02-19 20:30:31,210 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 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 [2021-02-19 20:30:31,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:30:31,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:30:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:31,965 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:30:32,690 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 20:30:33,257 WARN L202 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 20:30:33,575 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:30:34,128 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:30:35,253 WARN L202 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-02-19 20:30:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:35,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:35,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-02-19 20:30:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346554082] [2021-02-19 20:30:35,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:30:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:35,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:30:35,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:30:35,500 INFO L87 Difference]: Start difference. First operand 7528 states and 25253 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:35,857 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 14 [2021-02-19 20:30:36,121 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2021-02-19 20:30:36,308 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 20:30:36,615 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2021-02-19 20:30:37,152 WARN L202 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-02-19 20:30:37,446 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 20:30:37,725 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 23 [2021-02-19 20:30:38,311 WARN L202 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-02-19 20:30:38,709 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 20:30:39,095 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-02-19 20:30:39,433 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-02-19 20:30:40,330 WARN L202 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:30:41,269 WARN L202 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-02-19 20:30:41,836 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2021-02-19 20:30:42,204 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 20:30:42,904 WARN L202 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:30:43,842 WARN L202 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-19 20:30:44,108 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 20:30:44,395 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:30:44,746 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:30:45,183 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-02-19 20:30:45,505 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 20:30:45,910 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-02-19 20:30:46,636 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:30:47,838 WARN L202 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2021-02-19 20:30:48,855 WARN L202 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-02-19 20:30:49,103 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 20:30:49,371 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 20:30:49,598 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 20:30:50,111 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 Received shutdown request... [2021-02-19 20:30:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:30:50,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:50,516 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:30:50,520 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:30:50,520 INFO L202 PluginConnector]: Adding new model threaded-sum-3-Ea4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:30:50 BasicIcfg [2021-02-19 20:30:50,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:30:50,521 INFO L168 Benchmark]: Toolchain (without parser) took 513433.73 ms. Allocated memory was 255.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 236.4 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-02-19 20:30:50,521 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:30:50,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.15 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:30:50,521 INFO L168 Benchmark]: Boogie Preprocessor took 12.24 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.6 MB in the end (delta: 818.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:30:50,521 INFO L168 Benchmark]: RCFGBuilder took 240.29 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 233.2 MB in the end (delta: 226.2 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-02-19 20:30:50,521 INFO L168 Benchmark]: TraceAbstraction took 513148.55 ms. Allocated memory was 255.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 233.2 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-02-19 20:30:50,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.15 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.24 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.6 MB in the end (delta: 818.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 240.29 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 233.2 MB in the end (delta: 226.2 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 513148.55 ms. Allocated memory was 255.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 233.2 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 77). Cancelled while BasicCegarLoop was constructing difference of abstraction (7528states) and FLOYD_HOARE automaton (currently 58 states, 37 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 513.0s, OverallIterations: 59, TraceHistogramMax: 3, AutomataDifference: 374.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1880 SDtfs, 29425 SDslu, 24964 SDs, 0 SdLazy, 49220 SolverSat, 13795 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5016 GetRequests, 1004 SyntacticMatches, 131 SemanticMatches, 3880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92674 ImplicationChecksByTransitivity, 407.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11571occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.7s AutomataMinimizationTime, 58 MinimizatonAttempts, 206803 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 117.2s InterpolantComputationTime, 3823 NumberOfCodeBlocks, 3823 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3709 ConstructedInterpolants, 0 QuantifiedInterpolants, 4276750 SizeOfPredicates, 363 NumberOfNonLiveVariables, 3457 ConjunctsInSsa, 1105 ConjunctsInUnsatCore, 114 InterpolantComputations, 4 PerfectInterpolantSequences, 29/1514 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown