/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-v9T.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:24:59,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:24:59,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:24:59,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:24:59,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 20:24:59,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 20:24:59,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 20:24:59,198 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 20:24:59,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:24:59,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:24:59,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:24:59,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:24:59,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:24:59,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:24:59,244 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:24:59,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:24:59,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:24:59,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:24:59,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:24:59,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:24:59,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:24:59,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:24:59,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:24:59,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:24:59,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:24:59,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:24:59,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:24:59,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:24:59,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:24:59,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:24:59,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:24:59,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:24:59,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:24:59,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:24:59,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:24:59,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:24:59,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:24:59,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:24:59,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:24:59,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:24:59,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:24:59,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:24:59,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:24:59,649 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:24:59,655 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:24:59,656 INFO L432 ainManager$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-v9T.wvr.bpl [2021-02-19 20:24:59,657 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-v9T.wvr.bpl' [2021-02-19 20:24:59,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:24:59,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:24:59,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:24:59,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:24:59,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:24:59,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:24:59,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:24:59,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:24:59,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:24:59,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/1) ... [2021-02-19 20:24:59,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:24:59,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:24:59,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:24:59,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:24:59,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (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 20:24:59,845 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:24:59,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:24:59,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:24:59,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:24:59,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:24:59,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:24:59,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:24:59,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:24:59,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:24:59,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 20:24:59,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 20:24:59,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 20:24:59,848 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 20:25:00,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:25:00,224 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:25:00,226 INFO L202 PluginConnector]: Adding new model threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:25:00 BoogieIcfgContainer [2021-02-19 20:25:00,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:25:00,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:25:00,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:25:00,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:25:00,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:24:59" (1/2) ... [2021-02-19 20:25:00,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e774e59 and model type threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:25:00, skipping insertion in model container [2021-02-19 20:25:00,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:25:00" (2/2) ... [2021-02-19 20:25:00,247 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3-v9T.wvr.bpl [2021-02-19 20:25:00,253 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:25:00,253 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:25:00,257 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:25:00,275 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:25:00,364 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 20:25:00,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 20:25:00,403 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:25:00,404 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:25:00,404 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:25:00,404 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:25:00,404 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:25:00,404 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:25:00,404 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:25:00,404 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:25:00,425 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-02-19 20:25:00,457 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 20:25:00,462 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 20:25:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:25:00,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:00,478 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 20:25:00,479 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1037789278, now seen corresponding path program 1 times [2021-02-19 20:25:00,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:00,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293904970] [2021-02-19 20:25:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:00,717 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 20:25:00,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293904970] [2021-02-19 20:25:00,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:00,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:25:00,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103429132] [2021-02-19 20:25:00,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:25:00,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:00,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:25:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:25:00,747 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 20:25:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:00,860 INFO L93 Difference]: Finished difference Result 126 states and 331 transitions. [2021-02-19 20:25:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:25:00,864 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 20:25:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:00,882 INFO L225 Difference]: With dead ends: 126 [2021-02-19 20:25:00,882 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 20:25:00,885 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 20:25:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 20:25:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-02-19 20:25:00,934 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 20:25:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 331 transitions. [2021-02-19 20:25:00,938 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 331 transitions. Word has length 21 [2021-02-19 20:25:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:00,939 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 331 transitions. [2021-02-19 20:25:00,939 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 20:25:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 331 transitions. [2021-02-19 20:25:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 20:25:00,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:00,941 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 20:25:00,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:25:00,942 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:00,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1191275523, now seen corresponding path program 1 times [2021-02-19 20:25:00,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:00,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302912901] [2021-02-19 20:25:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:00,997 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 20:25:00,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302912901] [2021-02-19 20:25:00,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:00,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:25:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716119152] [2021-02-19 20:25:01,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:25:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:25:01,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:25:01,002 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 20:25:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:01,038 INFO L93 Difference]: Finished difference Result 176 states and 475 transitions. [2021-02-19 20:25:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:25:01,039 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 20:25:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:01,041 INFO L225 Difference]: With dead ends: 176 [2021-02-19 20:25:01,041 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 20:25:01,042 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 20:25:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 20:25:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-02-19 20:25:01,058 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 20:25:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-02-19 20:25:01,059 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 24 [2021-02-19 20:25:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:01,062 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-02-19 20:25:01,062 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 20:25:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-02-19 20:25:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:25:01,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:01,064 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 20:25:01,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 20:25:01,065 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -757745613, now seen corresponding path program 1 times [2021-02-19 20:25:01,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:01,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335424290] [2021-02-19 20:25:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:01,136 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 20:25:01,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335424290] [2021-02-19 20:25:01,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:01,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:25:01,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028624517] [2021-02-19 20:25:01,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:25:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:25:01,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:25:01,145 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 20:25:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:01,260 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-02-19 20:25:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:25:01,260 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 20:25:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:01,263 INFO L225 Difference]: With dead ends: 223 [2021-02-19 20:25:01,263 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 20:25:01,264 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 20:25:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 20:25:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-02-19 20:25:01,281 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 20:25:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-02-19 20:25:01,282 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-02-19 20:25:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:01,283 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-02-19 20:25:01,283 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 20:25:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-02-19 20:25:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 20:25:01,285 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:01,285 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 20:25:01,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 20:25:01,290 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:01,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1825531115, now seen corresponding path program 1 times [2021-02-19 20:25:01,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:01,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256639943] [2021-02-19 20:25:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:01,390 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 20:25:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256639943] [2021-02-19 20:25:01,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:01,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:25:01,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121134618] [2021-02-19 20:25:01,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:25:01,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:01,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:25:01,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:25:01,395 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 20:25:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:01,477 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-02-19 20:25:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:25:01,478 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 20:25:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:01,484 INFO L225 Difference]: With dead ends: 344 [2021-02-19 20:25:01,484 INFO L226 Difference]: Without dead ends: 308 [2021-02-19 20:25:01,485 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 20:25:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-02-19 20:25:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-02-19 20:25:01,516 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 20:25:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-02-19 20:25:01,519 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-02-19 20:25:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:01,519 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-02-19 20:25:01,519 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 20:25:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-02-19 20:25:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:25:01,521 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:01,521 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 20:25:01,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:25:01,522 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash -857622317, now seen corresponding path program 2 times [2021-02-19 20:25:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:01,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999717682] [2021-02-19 20:25:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:01,666 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 20:25:01,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999717682] [2021-02-19 20:25:01,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164387721] [2021-02-19 20:25:01,667 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 20:25:01,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:01,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:01,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:25:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:02,264 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 20:25:02,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:02,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 20:25:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236685375] [2021-02-19 20:25:02,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:25:02,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:02,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:25:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:25:02,271 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 20:25:02,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:02,868 INFO L93 Difference]: Finished difference Result 646 states and 1894 transitions. [2021-02-19 20:25:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:25:02,869 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 20:25:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:02,874 INFO L225 Difference]: With dead ends: 646 [2021-02-19 20:25:02,874 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 20:25:02,875 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 20:25:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 20:25:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 486. [2021-02-19 20:25:02,911 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 20:25:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1440 transitions. [2021-02-19 20:25:02,915 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1440 transitions. Word has length 30 [2021-02-19 20:25:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:02,915 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 1440 transitions. [2021-02-19 20:25:02,915 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 20:25:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1440 transitions. [2021-02-19 20:25:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:25:02,920 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:02,921 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 20:25:03,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:03,135 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1874044433, now seen corresponding path program 3 times [2021-02-19 20:25:03,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:03,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658037322] [2021-02-19 20:25:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:03,318 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 20:25:03,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658037322] [2021-02-19 20:25:03,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429301293] [2021-02-19 20:25:03,320 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 20:25:03,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:25:03,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:25:03,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:03,804 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 20:25:03,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:03,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 20:25:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40597251] [2021-02-19 20:25:03,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:25:03,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:03,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:25:03,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:25:03,816 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 20:25:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:04,097 INFO L93 Difference]: Finished difference Result 732 states and 2167 transitions. [2021-02-19 20:25:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:25:04,097 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 20:25:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:04,105 INFO L225 Difference]: With dead ends: 732 [2021-02-19 20:25:04,108 INFO L226 Difference]: Without dead ends: 732 [2021-02-19 20:25:04,109 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 20:25:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-02-19 20:25:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 390. [2021-02-19 20:25:04,129 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 20:25:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1120 transitions. [2021-02-19 20:25:04,132 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1120 transitions. Word has length 30 [2021-02-19 20:25:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:04,135 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1120 transitions. [2021-02-19 20:25:04,135 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 20:25:04,142 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1120 transitions. [2021-02-19 20:25:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:25:04,144 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:04,144 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 20:25:04,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 20:25:04,358 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1240349297, now seen corresponding path program 4 times [2021-02-19 20:25:04,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:04,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450313514] [2021-02-19 20:25:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:04,533 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 20:25:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450313514] [2021-02-19 20:25:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139995143] [2021-02-19 20:25:04,534 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 20:25:04,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:25:04,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:04,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 20:25:04,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:04,928 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 20:25:04,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:04,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-02-19 20:25:04,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602880215] [2021-02-19 20:25:04,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:25:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:25:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:25:04,933 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 20:25:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:05,351 INFO L93 Difference]: Finished difference Result 670 states and 1948 transitions. [2021-02-19 20:25:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:25:05,351 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 20:25:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:05,356 INFO L225 Difference]: With dead ends: 670 [2021-02-19 20:25:05,357 INFO L226 Difference]: Without dead ends: 670 [2021-02-19 20:25:05,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:25:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-02-19 20:25:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 550. [2021-02-19 20:25:05,377 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 20:25:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1616 transitions. [2021-02-19 20:25:05,381 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1616 transitions. Word has length 32 [2021-02-19 20:25:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:05,382 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1616 transitions. [2021-02-19 20:25:05,383 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 20:25:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1616 transitions. [2021-02-19 20:25:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:25:05,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:05,385 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 20:25:05,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 20:25:05,615 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash -595701139, now seen corresponding path program 5 times [2021-02-19 20:25:05,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:05,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038138662] [2021-02-19 20:25:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:05,844 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 20:25:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038138662] [2021-02-19 20:25:05,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276590620] [2021-02-19 20:25:05,845 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 20:25:05,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:25:05,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:05,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 20:25:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:06,291 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 20:25:06,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:06,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-02-19 20:25:06,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045402821] [2021-02-19 20:25:06,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:25:06,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:06,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:25:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:25:06,294 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 20:25:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:07,252 INFO L93 Difference]: Finished difference Result 1176 states and 3451 transitions. [2021-02-19 20:25:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:25:07,253 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 20:25:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:07,259 INFO L225 Difference]: With dead ends: 1176 [2021-02-19 20:25:07,260 INFO L226 Difference]: Without dead ends: 1176 [2021-02-19 20:25:07,266 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 20:25:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-02-19 20:25:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 606. [2021-02-19 20:25:07,292 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 20:25:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1776 transitions. [2021-02-19 20:25:07,300 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1776 transitions. Word has length 32 [2021-02-19 20:25:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:07,300 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1776 transitions. [2021-02-19 20:25:07,301 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 20:25:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1776 transitions. [2021-02-19 20:25:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:25:07,303 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:07,303 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 20:25:07,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:07,530 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1343337903, now seen corresponding path program 6 times [2021-02-19 20:25:07,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:07,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819425274] [2021-02-19 20:25:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:07,697 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 20:25:07,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819425274] [2021-02-19 20:25:07,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655600112] [2021-02-19 20:25:07,698 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 20:25:07,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:25:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:25:07,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:08,001 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 20:25:08,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:08,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-02-19 20:25:08,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469723600] [2021-02-19 20:25:08,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:25:08,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:25:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:25:08,006 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 20:25:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:08,210 INFO L93 Difference]: Finished difference Result 898 states and 2510 transitions. [2021-02-19 20:25:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:25:08,211 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 20:25:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:08,218 INFO L225 Difference]: With dead ends: 898 [2021-02-19 20:25:08,219 INFO L226 Difference]: Without dead ends: 898 [2021-02-19 20:25:08,219 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 20:25:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-02-19 20:25:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 606. [2021-02-19 20:25:08,244 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 20:25:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1785 transitions. [2021-02-19 20:25:08,247 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1785 transitions. Word has length 32 [2021-02-19 20:25:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:08,248 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1785 transitions. [2021-02-19 20:25:08,248 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 20:25:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1785 transitions. [2021-02-19 20:25:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:08,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:08,252 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 20:25:08,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:08,478 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:08,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1243558769, now seen corresponding path program 7 times [2021-02-19 20:25:08,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:08,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219143899] [2021-02-19 20:25:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:08,917 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 20:25:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219143899] [2021-02-19 20:25:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752502955] [2021-02-19 20:25:08,918 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 20:25:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:08,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:10,070 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 20:25:10,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:25:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839474228] [2021-02-19 20:25:10,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:25:10,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:25:10,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:25:10,077 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 20:25:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:11,367 INFO L93 Difference]: Finished difference Result 1216 states and 3475 transitions. [2021-02-19 20:25:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 20:25:11,368 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 20:25:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:11,375 INFO L225 Difference]: With dead ends: 1216 [2021-02-19 20:25:11,375 INFO L226 Difference]: Without dead ends: 1144 [2021-02-19 20:25:11,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:25:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-02-19 20:25:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 806. [2021-02-19 20:25:11,412 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 20:25:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2411 transitions. [2021-02-19 20:25:11,418 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2411 transitions. Word has length 34 [2021-02-19 20:25:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:11,418 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2411 transitions. [2021-02-19 20:25:11,418 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 20:25:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2411 transitions. [2021-02-19 20:25:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:11,422 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:11,422 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 20:25:11,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:11,649 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 99319179, now seen corresponding path program 8 times [2021-02-19 20:25:11,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:11,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197745775] [2021-02-19 20:25:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:12,111 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 20:25:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197745775] [2021-02-19 20:25:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309097428] [2021-02-19 20:25:12,112 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 20:25:12,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:12,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:25:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:13,008 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 20:25:13,305 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-02-19 20:25:13,443 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 20:25:13,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:13,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272181037] [2021-02-19 20:25:13,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:13,448 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 20:25:14,448 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 20:25:15,324 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:25:15,844 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 20:25:16,235 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:25:16,563 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:25:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:17,144 INFO L93 Difference]: Finished difference Result 2101 states and 5925 transitions. [2021-02-19 20:25:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 20:25:17,145 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 20:25:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:17,154 INFO L225 Difference]: With dead ends: 2101 [2021-02-19 20:25:17,155 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 20:25:17,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=865, Invalid=3965, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:25:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 20:25:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 940. [2021-02-19 20:25:17,196 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 20:25:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2856 transitions. [2021-02-19 20:25:17,201 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2856 transitions. Word has length 34 [2021-02-19 20:25:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:17,201 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2856 transitions. [2021-02-19 20:25:17,202 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 20:25:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2856 transitions. [2021-02-19 20:25:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:17,205 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:17,205 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 20:25:17,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 20:25:17,430 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1425961677, now seen corresponding path program 9 times [2021-02-19 20:25:17,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:17,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284722177] [2021-02-19 20:25:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:17,813 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 20:25:17,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284722177] [2021-02-19 20:25:17,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109440567] [2021-02-19 20:25:17,814 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 20:25:17,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:25:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:17,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:17,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:18,910 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 20:25:19,045 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 20:25:19,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:19,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:25:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985704319] [2021-02-19 20:25:19,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:19,048 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 20:25:19,830 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 20:25:21,233 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:25:21,764 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 20:25:22,213 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:25:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:22,657 INFO L93 Difference]: Finished difference Result 2730 states and 7924 transitions. [2021-02-19 20:25:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:25:22,658 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 20:25:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:22,672 INFO L225 Difference]: With dead ends: 2730 [2021-02-19 20:25:22,673 INFO L226 Difference]: Without dead ends: 2410 [2021-02-19 20:25:22,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=857, Invalid=3565, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:25:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-02-19 20:25:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1090. [2021-02-19 20:25:22,725 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 20:25:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3379 transitions. [2021-02-19 20:25:22,731 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3379 transitions. Word has length 34 [2021-02-19 20:25:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:22,733 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3379 transitions. [2021-02-19 20:25:22,733 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 20:25:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3379 transitions. [2021-02-19 20:25:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:22,736 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:22,737 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 20:25:22,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 20:25:22,943 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1840933751, now seen corresponding path program 10 times [2021-02-19 20:25:22,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:22,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763878991] [2021-02-19 20:25:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:23,292 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 20:25:23,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763878991] [2021-02-19 20:25:23,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134033203] [2021-02-19 20:25:23,292 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 20:25:23,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:25:23,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:24,373 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 20:25:24,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:24,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:25:24,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322354303] [2021-02-19 20:25:24,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:25:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:25:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:25:24,396 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 20:25:24,876 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 20:25:25,142 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:25:25,342 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 20:25:25,818 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 20:25:26,120 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-02-19 20:25:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:27,408 INFO L93 Difference]: Finished difference Result 2642 states and 7900 transitions. [2021-02-19 20:25:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:25:27,409 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 20:25:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:27,422 INFO L225 Difference]: With dead ends: 2642 [2021-02-19 20:25:27,422 INFO L226 Difference]: Without dead ends: 2570 [2021-02-19 20:25:27,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=787, Invalid=3119, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:25:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-02-19 20:25:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1278. [2021-02-19 20:25:27,478 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 20:25:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 3997 transitions. [2021-02-19 20:25:27,486 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 3997 transitions. Word has length 34 [2021-02-19 20:25:27,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:27,486 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 3997 transitions. [2021-02-19 20:25:27,487 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 20:25:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 3997 transitions. [2021-02-19 20:25:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:27,492 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:27,492 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 20:25:27,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:27,718 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1621746551, now seen corresponding path program 11 times [2021-02-19 20:25:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:27,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029365639] [2021-02-19 20:25:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:28,122 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 20:25:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029365639] [2021-02-19 20:25:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826558718] [2021-02-19 20:25:28,123 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 20:25:28,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:25:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:29,231 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 20:25:29,450 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-02-19 20:25:29,686 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 20:25:29,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:29,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:25:29,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022877240] [2021-02-19 20:25:29,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:25:29,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:29,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:25:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:25:29,689 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 20:25:30,591 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-02-19 20:25:31,139 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:25:31,315 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 20:25:31,751 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:25:32,649 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 20:25:32,973 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-02-19 20:25:33,558 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 20:25:33,808 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2021-02-19 20:25:34,295 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:25:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:34,600 INFO L93 Difference]: Finished difference Result 3169 states and 9530 transitions. [2021-02-19 20:25:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 20:25:34,601 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 20:25:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:34,618 INFO L225 Difference]: With dead ends: 3169 [2021-02-19 20:25:34,618 INFO L226 Difference]: Without dead ends: 3094 [2021-02-19 20:25:34,620 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1498, Invalid=4982, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:25:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-02-19 20:25:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 1444. [2021-02-19 20:25:34,675 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 20:25:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4546 transitions. [2021-02-19 20:25:34,681 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4546 transitions. Word has length 34 [2021-02-19 20:25:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:34,682 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 4546 transitions. [2021-02-19 20:25:34,682 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 20:25:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4546 transitions. [2021-02-19 20:25:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:34,687 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:34,687 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 20:25:34,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:34,902 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1464662903, now seen corresponding path program 12 times [2021-02-19 20:25:34,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:34,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569419497] [2021-02-19 20:25:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:35,270 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 20:25:35,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569419497] [2021-02-19 20:25:35,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044441855] [2021-02-19 20:25:35,271 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:35,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:25:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:36,100 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:25:36,558 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 20:25:36,707 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 20:25:36,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:36,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:25:36,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480390671] [2021-02-19 20:25:36,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:36,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:36,710 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 20:25:37,189 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 20:25:37,556 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 20:25:37,877 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 20:25:38,110 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 20:25:38,494 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:25:38,817 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-02-19 20:25:39,093 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 20:25:39,701 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:25:40,001 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-02-19 20:25:40,289 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 20:25:40,445 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 20:25:40,601 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 20:25:40,869 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 20:25:41,325 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 20:25:41,623 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-19 20:25:41,881 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:25:42,066 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:25:42,479 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:25:42,886 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-19 20:25:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:43,635 INFO L93 Difference]: Finished difference Result 5680 states and 17200 transitions. [2021-02-19 20:25:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 20:25:43,636 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 20:25:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:43,652 INFO L225 Difference]: With dead ends: 5680 [2021-02-19 20:25:43,652 INFO L226 Difference]: Without dead ends: 5267 [2021-02-19 20:25:43,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:25:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-02-19 20:25:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 1974. [2021-02-19 20:25:43,738 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 20:25:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6349 transitions. [2021-02-19 20:25:43,746 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6349 transitions. Word has length 34 [2021-02-19 20:25:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:43,747 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 6349 transitions. [2021-02-19 20:25:43,747 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 20:25:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6349 transitions. [2021-02-19 20:25:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:43,752 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:43,752 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 20:25:43,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-02-19 20:25:43,978 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash -354547013, now seen corresponding path program 13 times [2021-02-19 20:25:43,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:43,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583512223] [2021-02-19 20:25:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:44,313 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 20:25:44,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583512223] [2021-02-19 20:25:44,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019613065] [2021-02-19 20:25:44,313 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 20:25:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:44,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:25:44,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:44,867 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 20:25:45,294 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-02-19 20:25:45,599 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 20:25:45,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:45,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:25:45,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082020757] [2021-02-19 20:25:45,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:45,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:45,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:45,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:45,601 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 20:25:46,287 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 20:25:46,507 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 20:25:46,995 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 20:25:47,892 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:25:48,265 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-19 20:25:48,605 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 20:25:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:49,712 INFO L93 Difference]: Finished difference Result 4874 states and 15152 transitions. [2021-02-19 20:25:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 20:25:49,713 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 20:25:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:49,730 INFO L225 Difference]: With dead ends: 4874 [2021-02-19 20:25:49,730 INFO L226 Difference]: Without dead ends: 4593 [2021-02-19 20:25:49,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=955, Invalid=3335, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:25:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-02-19 20:25:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2277. [2021-02-19 20:25:49,815 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 20:25:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 7374 transitions. [2021-02-19 20:25:49,824 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 7374 transitions. Word has length 34 [2021-02-19 20:25:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:49,825 INFO L480 AbstractCegarLoop]: Abstraction has 2277 states and 7374 transitions. [2021-02-19 20:25:49,825 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 20:25:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 7374 transitions. [2021-02-19 20:25:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:49,830 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:49,830 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 20:25:50,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 20:25:50,057 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:50,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:50,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1340297677, now seen corresponding path program 14 times [2021-02-19 20:25:50,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:50,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011295024] [2021-02-19 20:25:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:50,562 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 20:25:50,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011295024] [2021-02-19 20:25:50,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404022453] [2021-02-19 20:25:50,562 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) [2021-02-19 20:25:50,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:50,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:25:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:51,291 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 20:25:51,612 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 20:25:52,017 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-02-19 20:25:52,125 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 20:25:52,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:52,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:52,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323842831] [2021-02-19 20:25:52,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:52,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:52,127 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 20:25:53,233 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:25:53,961 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 20:25:54,190 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 20:25:54,700 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 20:25:55,092 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:25:55,366 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 20:25:55,734 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-02-19 20:25:56,256 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:25:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:56,826 INFO L93 Difference]: Finished difference Result 3757 states and 11473 transitions. [2021-02-19 20:25:56,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 20:25:56,826 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 20:25:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:56,835 INFO L225 Difference]: With dead ends: 3757 [2021-02-19 20:25:56,835 INFO L226 Difference]: Without dead ends: 3446 [2021-02-19 20:25:56,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=787, Invalid=4183, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:25:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-02-19 20:25:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2645. [2021-02-19 20:25:56,902 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 20:25:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8555 transitions. [2021-02-19 20:25:56,912 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8555 transitions. Word has length 34 [2021-02-19 20:25:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:56,912 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 8555 transitions. [2021-02-19 20:25:56,912 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 20:25:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8555 transitions. [2021-02-19 20:25:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:56,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:56,918 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 20:25:57,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-02-19 20:25:57,134 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1618219273, now seen corresponding path program 15 times [2021-02-19 20:25:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:57,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312232626] [2021-02-19 20:25:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:57,526 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 20:25:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312232626] [2021-02-19 20:25:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421313387] [2021-02-19 20:25:57,526 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 20:25:57,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:25:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:58,393 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 20:25:58,728 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:25:58,862 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 20:25:58,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:58,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:58,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132471232] [2021-02-19 20:25:58,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:58,864 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 20:25:59,663 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-02-19 20:26:00,343 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-02-19 20:26:00,542 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:01,162 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:01,310 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-02-19 20:26:01,812 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 20:26:02,038 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:02,298 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:02,463 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 20:26:02,759 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:26:03,273 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 20:26:03,526 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:26:03,962 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-02-19 20:26:04,307 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:26:04,785 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:26:05,137 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:26:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:05,880 INFO L93 Difference]: Finished difference Result 7155 states and 22256 transitions. [2021-02-19 20:26:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 20:26:05,881 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 20:26:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:05,907 INFO L225 Difference]: With dead ends: 7155 [2021-02-19 20:26:05,907 INFO L226 Difference]: Without dead ends: 6793 [2021-02-19 20:26:05,909 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1569, Invalid=5571, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 20:26:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2021-02-19 20:26:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 3952. [2021-02-19 20:26:06,038 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 20:26:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 12919 transitions. [2021-02-19 20:26:06,054 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 12919 transitions. Word has length 34 [2021-02-19 20:26:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:06,054 INFO L480 AbstractCegarLoop]: Abstraction has 3952 states and 12919 transitions. [2021-02-19 20:26:06,054 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 20:26:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 12919 transitions. [2021-02-19 20:26:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:06,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:06,064 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 20:26:06,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:06,278 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash -799869765, now seen corresponding path program 16 times [2021-02-19 20:26:06,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:06,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136926454] [2021-02-19 20:26:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:06,735 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 20:26:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136926454] [2021-02-19 20:26:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411037679] [2021-02-19 20:26:06,736 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 20:26:06,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:26:06,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:06,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:07,347 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:07,791 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:26:08,301 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 20:26:08,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:08,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:26:08,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587469996] [2021-02-19 20:26:08,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:26:08,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:26:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:26:08,311 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 20:26:09,123 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:09,614 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:26:10,213 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:10,974 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:11,877 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-19 20:26:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:12,516 INFO L93 Difference]: Finished difference Result 6123 states and 19299 transitions. [2021-02-19 20:26:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 20:26:12,517 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 20:26:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:12,534 INFO L225 Difference]: With dead ends: 6123 [2021-02-19 20:26:12,534 INFO L226 Difference]: Without dead ends: 6072 [2021-02-19 20:26:12,535 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 20:26:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-02-19 20:26:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4272. [2021-02-19 20:26:12,651 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 20:26:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 14015 transitions. [2021-02-19 20:26:12,668 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 14015 transitions. Word has length 34 [2021-02-19 20:26:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:12,669 INFO L480 AbstractCegarLoop]: Abstraction has 4272 states and 14015 transitions. [2021-02-19 20:26:12,669 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 20:26:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 14015 transitions. [2021-02-19 20:26:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:12,679 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:12,679 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 20:26:12,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:12,905 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash 254299323, now seen corresponding path program 17 times [2021-02-19 20:26:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:12,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174679756] [2021-02-19 20:26:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:13,354 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 20:26:13,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174679756] [2021-02-19 20:26:13,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584013699] [2021-02-19 20:26:13,354 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 20:26:13,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:26:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:26:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:13,957 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:14,431 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:26:14,632 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:14,971 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:26:15,201 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 20:26:15,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:15,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:26:15,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559110738] [2021-02-19 20:26:15,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:26:15,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:26:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:26:15,206 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 20:26:16,215 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 31 [2021-02-19 20:26:16,406 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-02-19 20:26:17,145 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:26:17,852 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:18,608 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:26:19,310 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-02-19 20:26:19,526 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-02-19 20:26:19,829 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:26:20,138 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:26:20,527 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-02-19 20:26:20,723 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 20:26:20,976 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-02-19 20:26:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:21,236 INFO L93 Difference]: Finished difference Result 9418 states and 29999 transitions. [2021-02-19 20:26:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 20:26:21,237 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 20:26:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:21,258 INFO L225 Difference]: With dead ends: 9418 [2021-02-19 20:26:21,258 INFO L226 Difference]: Without dead ends: 9316 [2021-02-19 20:26:21,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1348, Invalid=5294, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:26:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-02-19 20:26:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 5318. [2021-02-19 20:26:21,414 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 20:26:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 17551 transitions. [2021-02-19 20:26:21,483 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 17551 transitions. Word has length 34 [2021-02-19 20:26:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:21,483 INFO L480 AbstractCegarLoop]: Abstraction has 5318 states and 17551 transitions. [2021-02-19 20:26:21,483 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 20:26:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 17551 transitions. [2021-02-19 20:26:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:21,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:21,496 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 20:26:21,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:21,713 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1433400133, now seen corresponding path program 18 times [2021-02-19 20:26:21,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:21,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638532386] [2021-02-19 20:26:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:22,197 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 20:26:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638532386] [2021-02-19 20:26:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907414906] [2021-02-19 20:26:22,197 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 20:26:22,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:26:22,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:22,855 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:23,210 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:23,664 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:26:23,856 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 20:26:23,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:23,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:26:23,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714426227] [2021-02-19 20:26:23,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:26:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:26:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:26:23,861 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 20:26:24,755 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:25,426 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:25,908 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:26,213 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:26,719 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:26:27,004 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:27,531 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:26:27,827 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:28,506 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:26:28,814 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:26:28,955 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 20:26:29,331 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:29,602 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 20:26:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:30,357 INFO L93 Difference]: Finished difference Result 10127 states and 32309 transitions. [2021-02-19 20:26:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:26:30,358 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 20:26:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:30,380 INFO L225 Difference]: With dead ends: 10127 [2021-02-19 20:26:30,380 INFO L226 Difference]: Without dead ends: 9768 [2021-02-19 20:26:30,381 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1136, Invalid=5026, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 20:26:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-02-19 20:26:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 5562. [2021-02-19 20:26:30,557 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 20:26:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 18381 transitions. [2021-02-19 20:26:30,579 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 18381 transitions. Word has length 34 [2021-02-19 20:26:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:30,579 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 18381 transitions. [2021-02-19 20:26:30,580 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 20:26:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 18381 transitions. [2021-02-19 20:26:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:30,595 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:30,595 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 20:26:30,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:30,821 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 940541319, now seen corresponding path program 19 times [2021-02-19 20:26:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:30,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060488089] [2021-02-19 20:26:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:31,278 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 20:26:31,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060488089] [2021-02-19 20:26:31,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8839567] [2021-02-19 20:26:31,279 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 20:26:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:26:31,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:32,020 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:26:32,296 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:32,664 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:32,966 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 20:26:33,159 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 20:26:33,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:33,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 20:26:33,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523073185] [2021-02-19 20:26:33,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:26:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:26:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:26:33,161 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 20:26:34,036 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-02-19 20:26:34,603 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-02-19 20:26:34,859 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 20:26:35,283 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-02-19 20:26:35,923 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:26:36,175 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 20:26:36,424 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 20:26:36,653 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 20:26:37,046 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:37,208 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:26:37,455 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-02-19 20:26:37,818 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 20:26:38,053 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 20:26:38,326 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:26:38,511 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-02-19 20:26:38,710 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:26:38,849 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:26:39,002 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 20:26:39,308 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-02-19 20:26:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:39,470 INFO L93 Difference]: Finished difference Result 13062 states and 42271 transitions. [2021-02-19 20:26:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:26:39,471 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 20:26:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:39,494 INFO L225 Difference]: With dead ends: 13062 [2021-02-19 20:26:39,494 INFO L226 Difference]: Without dead ends: 12975 [2021-02-19 20:26:39,495 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1432, Invalid=5048, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:26:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-02-19 20:26:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 7340. [2021-02-19 20:26:39,651 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 20:26:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 24487 transitions. [2021-02-19 20:26:39,673 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 24487 transitions. Word has length 34 [2021-02-19 20:26:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:39,673 INFO L480 AbstractCegarLoop]: Abstraction has 7340 states and 24487 transitions. [2021-02-19 20:26:39,673 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 20:26:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 24487 transitions. [2021-02-19 20:26:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:39,689 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:39,689 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 20:26:39,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-02-19 20:26:39,902 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:39,902 INFO L82 PathProgramCache]: Analyzing trace with hash 783457671, now seen corresponding path program 20 times [2021-02-19 20:26:39,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:39,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020432329] [2021-02-19 20:26:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:40,284 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 20:26:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020432329] [2021-02-19 20:26:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363774549] [2021-02-19 20:26:40,284 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 20:26:40,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:26:40,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:40,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:40,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:41,017 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:26:41,252 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:41,570 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:26:41,751 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 20:26:41,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:26:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303750463] [2021-02-19 20:26:41,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:41,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:41,752 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 20:26:42,668 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:43,529 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:43,879 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:44,017 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 20:26:44,449 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-02-19 20:26:44,831 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:26:45,065 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:26:45,326 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:45,601 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:45,756 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:26:45,958 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:26:46,246 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:47,217 INFO L93 Difference]: Finished difference Result 14783 states and 48239 transitions. [2021-02-19 20:26:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 20:26:47,218 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 20:26:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:47,250 INFO L225 Difference]: With dead ends: 14783 [2021-02-19 20:26:47,250 INFO L226 Difference]: Without dead ends: 14361 [2021-02-19 20:26:47,251 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1086, Invalid=4316, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:26:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14361 states. [2021-02-19 20:26:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14361 to 8734. [2021-02-19 20:26:47,459 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 20:26:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8734 states to 8734 states and 29261 transitions. [2021-02-19 20:26:47,482 INFO L78 Accepts]: Start accepts. Automaton has 8734 states and 29261 transitions. Word has length 34 [2021-02-19 20:26:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:47,482 INFO L480 AbstractCegarLoop]: Abstraction has 8734 states and 29261 transitions. [2021-02-19 20:26:47,483 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 20:26:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8734 states and 29261 transitions. [2021-02-19 20:26:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:47,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:47,495 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 20:26:47,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 20:26:47,696 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1835171925, now seen corresponding path program 21 times [2021-02-19 20:26:47,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:47,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568406350] [2021-02-19 20:26:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:48,053 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 20:26:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568406350] [2021-02-19 20:26:48,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271662913] [2021-02-19 20:26:48,054 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 20:26:48,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:26:48,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:48,635 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:48,972 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:49,339 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:26:49,472 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 20:26:49,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:49,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:26:49,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795279456] [2021-02-19 20:26:49,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:49,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:49,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:49,473 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 20:26:49,664 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 20:26:50,245 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:50,698 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:51,174 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:51,382 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 20:26:51,861 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:26:52,295 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:26:52,954 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:26:53,363 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:54,014 INFO L93 Difference]: Finished difference Result 13041 states and 42542 transitions. [2021-02-19 20:26:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:26:54,015 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 20:26:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:54,038 INFO L225 Difference]: With dead ends: 13041 [2021-02-19 20:26:54,039 INFO L226 Difference]: Without dead ends: 12684 [2021-02-19 20:26:54,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=909, Invalid=4061, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:26:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12684 states. [2021-02-19 20:26:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12684 to 8908. [2021-02-19 20:26:54,211 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 20:26:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 29830 transitions. [2021-02-19 20:26:54,237 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 29830 transitions. Word has length 34 [2021-02-19 20:26:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:54,237 INFO L480 AbstractCegarLoop]: Abstraction has 8908 states and 29830 transitions. [2021-02-19 20:26:54,237 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 20:26:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 29830 transitions. [2021-02-19 20:26:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:54,250 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:54,250 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 20:26:54,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-02-19 20:26:54,451 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1431723503, now seen corresponding path program 22 times [2021-02-19 20:26:54,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:54,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854666292] [2021-02-19 20:26:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:54,819 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 20:26:54,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854666292] [2021-02-19 20:26:54,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158444249] [2021-02-19 20:26:54,819 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 20:26:54,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:26:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:26:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:55,433 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:55,653 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:26:56,169 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 20:26:56,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:56,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:26:56,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362759698] [2021-02-19 20:26:56,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:26:56,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:26:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:26:56,170 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 20:26:56,338 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 20:26:57,063 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:57,576 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:26:57,996 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:26:58,279 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:59,212 INFO L93 Difference]: Finished difference Result 12200 states and 40288 transitions. [2021-02-19 20:26:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:26:59,212 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 20:26:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:59,233 INFO L225 Difference]: With dead ends: 12200 [2021-02-19 20:26:59,233 INFO L226 Difference]: Without dead ends: 12128 [2021-02-19 20:26:59,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=774, Invalid=3008, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:26:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12128 states. [2021-02-19 20:26:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12128 to 8974. [2021-02-19 20:26:59,402 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 20:26:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 30046 transitions. [2021-02-19 20:26:59,421 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 30046 transitions. Word has length 34 [2021-02-19 20:26:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:59,421 INFO L480 AbstractCegarLoop]: Abstraction has 8974 states and 30046 transitions. [2021-02-19 20:26:59,421 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 20:26:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 30046 transitions. [2021-02-19 20:26:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:59,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:59,434 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 20:26:59,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-02-19 20:26:59,634 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:59,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1212536303, now seen corresponding path program 23 times [2021-02-19 20:26:59,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:59,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777309106] [2021-02-19 20:26:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:00,075 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 20:27:00,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777309106] [2021-02-19 20:27:00,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129112386] [2021-02-19 20:27:00,075 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) [2021-02-19 20:27:00,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:27:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:27:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:00,733 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:27:00,994 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:27:01,517 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:27:01,825 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:27:02,055 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 20:27:02,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:02,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:27:02,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164315176] [2021-02-19 20:27:02,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:27:02,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:02,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:27:02,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:27:02,056 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 20:27:03,530 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-02-19 20:27:04,177 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:27:04,406 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-02-19 20:27:05,128 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:27:05,887 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 20:27:06,288 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-02-19 20:27:07,032 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-02-19 20:27:07,261 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-02-19 20:27:07,557 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:27:07,852 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 20:27:07,989 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:27:08,234 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-02-19 20:27:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:08,477 INFO L93 Difference]: Finished difference Result 15037 states and 49384 transitions. [2021-02-19 20:27:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:27:08,478 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 20:27:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:08,503 INFO L225 Difference]: With dead ends: 15037 [2021-02-19 20:27:08,504 INFO L226 Difference]: Without dead ends: 14962 [2021-02-19 20:27:08,504 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1645, Invalid=5837, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 20:27:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2021-02-19 20:27:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 9146. [2021-02-19 20:27:08,659 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 20:27:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 30571 transitions. [2021-02-19 20:27:08,678 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 30571 transitions. Word has length 34 [2021-02-19 20:27:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:08,679 INFO L480 AbstractCegarLoop]: Abstraction has 9146 states and 30571 transitions. [2021-02-19 20:27:08,679 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 20:27:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 30571 transitions. [2021-02-19 20:27:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:08,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:08,690 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 20:27:08,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:08,890 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:08,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1055452655, now seen corresponding path program 24 times [2021-02-19 20:27:08,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:08,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164217886] [2021-02-19 20:27:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:09,331 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 20:27:09,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164217886] [2021-02-19 20:27:09,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123356481] [2021-02-19 20:27:09,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:27:09,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:27:09,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:09,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:10,041 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:27:10,253 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:27:10,703 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:27:10,905 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 20:27:10,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:10,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:27:10,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268534158] [2021-02-19 20:27:10,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:27:10,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:27:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:27:10,906 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 20:27:11,091 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 20:27:11,802 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:27:12,326 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:27:12,792 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:27:13,017 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:27:13,348 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:13,571 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:27:14,195 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:14,367 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:27:14,675 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:27:15,017 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 20:27:15,446 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:15,805 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:27:16,114 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:27:16,317 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:27:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:17,416 INFO L93 Difference]: Finished difference Result 16097 states and 52762 transitions. [2021-02-19 20:27:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 20:27:17,417 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 20:27:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:17,443 INFO L225 Difference]: With dead ends: 16097 [2021-02-19 20:27:17,444 INFO L226 Difference]: Without dead ends: 15631 [2021-02-19 20:27:17,444 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1114, Invalid=4436, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 20:27:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-02-19 20:27:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 9196. [2021-02-19 20:27:17,603 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 20:27:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 30757 transitions. [2021-02-19 20:27:17,622 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 30757 transitions. Word has length 34 [2021-02-19 20:27:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:17,622 INFO L480 AbstractCegarLoop]: Abstraction has 9196 states and 30757 transitions. [2021-02-19 20:27:17,622 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 20:27:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 30757 transitions. [2021-02-19 20:27:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:17,633 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:17,633 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 20:27:17,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-02-19 20:27:17,833 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash -763757261, now seen corresponding path program 25 times [2021-02-19 20:27:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:17,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105365120] [2021-02-19 20:27:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:18,231 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 20:27:18,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105365120] [2021-02-19 20:27:18,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052731999] [2021-02-19 20:27:18,232 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 20:27:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:27:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:18,845 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:27:19,068 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:27:19,399 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:27:19,564 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:27:19,770 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 20:27:19,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:19,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:27:19,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174670230] [2021-02-19 20:27:19,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:27:19,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:27:19,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:27:19,772 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 20:27:19,964 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 20:27:20,795 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:21,303 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:27:21,865 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:22,114 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:27:22,415 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:22,868 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 20:27:23,382 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:27:23,697 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:27:23,956 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 20:27:24,274 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-02-19 20:27:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:25,533 INFO L93 Difference]: Finished difference Result 15913 states and 52373 transitions. [2021-02-19 20:27:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:27:25,534 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 20:27:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:25,564 INFO L225 Difference]: With dead ends: 15913 [2021-02-19 20:27:25,564 INFO L226 Difference]: Without dead ends: 15585 [2021-02-19 20:27:25,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=994, Invalid=3562, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:27:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2021-02-19 20:27:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 9252. [2021-02-19 20:27:25,766 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 20:27:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9252 states to 9252 states and 30953 transitions. [2021-02-19 20:27:25,785 INFO L78 Accepts]: Start accepts. Automaton has 9252 states and 30953 transitions. Word has length 34 [2021-02-19 20:27:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:25,786 INFO L480 AbstractCegarLoop]: Abstraction has 9252 states and 30953 transitions. [2021-02-19 20:27:25,786 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 20:27:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states and 30953 transitions. [2021-02-19 20:27:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:25,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:25,797 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 20:27:25,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:25,999 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash 572455031, now seen corresponding path program 26 times [2021-02-19 20:27:26,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:26,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812581871] [2021-02-19 20:27:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:26,566 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 20:27:26,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812581871] [2021-02-19 20:27:26,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105800430] [2021-02-19 20:27:26,566 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 20:27:26,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:27:26,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:27:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:27,380 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:27:27,679 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:27:28,065 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 20:27:28,149 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 20:27:28,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:28,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:27:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999998347] [2021-02-19 20:27:28,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:27:28,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:27:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:27:28,150 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 20:27:29,373 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 20:27:29,729 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:27:30,607 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 20:27:30,762 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 20:27:31,215 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 20:27:31,461 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 20:27:31,793 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 20:27:32,517 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:27:32,692 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-02-19 20:27:32,917 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:27:33,968 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-02-19 20:27:34,260 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:27:34,636 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-02-19 20:27:35,011 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 20:27:35,428 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-02-19 20:27:35,783 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:35,986 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:27:36,268 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 20:27:36,607 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:27:36,998 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:27:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:38,069 INFO L93 Difference]: Finished difference Result 14856 states and 48487 transitions. [2021-02-19 20:27:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-02-19 20:27:38,070 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 20:27:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:38,096 INFO L225 Difference]: With dead ends: 14856 [2021-02-19 20:27:38,096 INFO L226 Difference]: Without dead ends: 14505 [2021-02-19 20:27:38,097 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1789, Invalid=8923, Unknown=0, NotChecked=0, Total=10712 [2021-02-19 20:27:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2021-02-19 20:27:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 9576. [2021-02-19 20:27:38,264 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 20:27:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 32039 transitions. [2021-02-19 20:27:38,284 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 32039 transitions. Word has length 34 [2021-02-19 20:27:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:38,284 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 32039 transitions. [2021-02-19 20:27:38,284 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 20:27:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 32039 transitions. [2021-02-19 20:27:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:38,298 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:38,298 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 20:27:38,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-02-19 20:27:38,499 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:38,500 INFO L82 PathProgramCache]: Analyzing trace with hash -299968453, now seen corresponding path program 27 times [2021-02-19 20:27:38,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:38,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542624923] [2021-02-19 20:27:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:38,932 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 20:27:38,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542624923] [2021-02-19 20:27:38,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492998328] [2021-02-19 20:27:38,933 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 20:27:38,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:27:38,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:39,922 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:27:40,335 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:27:40,438 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 20:27:40,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:40,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:27:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788970365] [2021-02-19 20:27:40,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:27:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:27:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:27:40,439 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 20:27:40,681 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 20:27:41,655 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 20:27:42,143 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:27:42,320 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-02-19 20:27:42,847 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:27:43,329 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 20:27:43,658 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-02-19 20:27:44,127 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:44,340 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:27:44,674 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:27:44,822 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-02-19 20:27:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:45,619 INFO L93 Difference]: Finished difference Result 15149 states and 49635 transitions. [2021-02-19 20:27:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:27:45,620 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 20:27:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:45,649 INFO L225 Difference]: With dead ends: 15149 [2021-02-19 20:27:45,649 INFO L226 Difference]: Without dead ends: 14792 [2021-02-19 20:27:45,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:27:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14792 states. [2021-02-19 20:27:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14792 to 9678. [2021-02-19 20:27:45,825 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 20:27:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 32381 transitions. [2021-02-19 20:27:45,846 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 32381 transitions. Word has length 34 [2021-02-19 20:27:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:45,847 INFO L480 AbstractCegarLoop]: Abstraction has 9678 states and 32381 transitions. [2021-02-19 20:27:45,847 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 20:27:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 32381 transitions. [2021-02-19 20:27:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:45,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:45,863 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 20:27:46,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:46,067 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:46,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1675860881, now seen corresponding path program 28 times [2021-02-19 20:27:46,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:46,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45342473] [2021-02-19 20:27:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:46,532 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 20:27:46,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45342473] [2021-02-19 20:27:46,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75830109] [2021-02-19 20:27:46,533 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 20:27:46,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:27:46,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:46,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:47,533 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 20:27:47,837 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 20:27:48,106 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:27:48,176 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 20:27:48,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:48,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:27:48,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305712050] [2021-02-19 20:27:48,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:27:48,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:48,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:27:48,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:27:48,177 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 20:27:48,403 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:27:48,647 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:27:49,150 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 20:27:49,308 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 20:27:49,684 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 20:27:50,132 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 20:27:50,591 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 20:27:50,942 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:27:51,976 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 20:27:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:52,221 INFO L93 Difference]: Finished difference Result 14742 states and 48530 transitions. [2021-02-19 20:27:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:27:52,222 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 20:27:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:52,249 INFO L225 Difference]: With dead ends: 14742 [2021-02-19 20:27:52,249 INFO L226 Difference]: Without dead ends: 14670 [2021-02-19 20:27:52,249 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=758, Invalid=3024, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:27:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14670 states. [2021-02-19 20:27:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14670 to 9802. [2021-02-19 20:27:52,408 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 20:27:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 32797 transitions. [2021-02-19 20:27:52,433 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 32797 transitions. Word has length 34 [2021-02-19 20:27:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:52,433 INFO L480 AbstractCegarLoop]: Abstraction has 9802 states and 32797 transitions. [2021-02-19 20:27:52,433 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 20:27:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 32797 transitions. [2021-02-19 20:27:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:52,450 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:52,450 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 20:27:52,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-02-19 20:27:52,666 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:52,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1895048081, now seen corresponding path program 29 times [2021-02-19 20:27:52,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:52,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353313820] [2021-02-19 20:27:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:53,154 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 20:27:53,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353313820] [2021-02-19 20:27:53,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365275421] [2021-02-19 20:27:53,154 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 20:27:53,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:27:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:53,797 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:54,204 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:27:54,502 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:27:54,766 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:27:55,106 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-02-19 20:27:55,332 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 20:27:55,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:55,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:27:55,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320760611] [2021-02-19 20:27:55,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:27:55,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:27:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:27:55,333 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 20:27:55,765 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-02-19 20:27:56,340 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:27:57,077 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:27:57,614 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:27:57,949 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:27:58,267 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 20:27:58,716 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:27:59,166 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-19 20:27:59,348 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-02-19 20:27:59,722 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 20:28:00,246 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-02-19 20:28:00,542 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 20:28:01,216 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-02-19 20:28:01,894 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 20:28:02,349 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2021-02-19 20:28:02,597 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-02-19 20:28:02,802 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-02-19 20:28:03,025 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-02-19 20:28:03,193 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 23 [2021-02-19 20:28:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:03,332 INFO L93 Difference]: Finished difference Result 15311 states and 50239 transitions. [2021-02-19 20:28:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 20:28:03,333 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 20:28:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:03,363 INFO L225 Difference]: With dead ends: 15311 [2021-02-19 20:28:03,364 INFO L226 Difference]: Without dead ends: 15236 [2021-02-19 20:28:03,364 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1408, Invalid=4912, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:28:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2021-02-19 20:28:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 9808. [2021-02-19 20:28:03,541 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 20:28:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 32825 transitions. [2021-02-19 20:28:03,565 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 32825 transitions. Word has length 34 [2021-02-19 20:28:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:03,565 INFO L480 AbstractCegarLoop]: Abstraction has 9808 states and 32825 transitions. [2021-02-19 20:28:03,565 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 20:28:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 32825 transitions. [2021-02-19 20:28:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:03,578 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:03,578 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 20:28:03,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:03,779 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2052131729, now seen corresponding path program 30 times [2021-02-19 20:28:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:03,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832879064] [2021-02-19 20:28:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:04,268 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 20:28:04,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832879064] [2021-02-19 20:28:04,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827671861] [2021-02-19 20:28:04,268 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:04,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:28:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:28:04,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:04,752 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:28:04,951 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:28:05,381 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:28:05,544 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:28:06,025 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-02-19 20:28:06,177 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 20:28:06,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:06,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:28:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129840360] [2021-02-19 20:28:06,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:28:06,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:28:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:28:06,178 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 20:28:06,406 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:28:06,700 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:28:07,213 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:28:07,756 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:28:08,247 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 20:28:08,709 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:28:09,153 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:09,429 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:28:10,040 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 20:28:10,289 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:28:10,655 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:28:11,042 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 20:28:11,724 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-02-19 20:28:12,103 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:12,514 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:28:12,948 WARN L202 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 20:28:13,384 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 20:28:13,639 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:28:14,043 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:28:14,347 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 20:28:14,618 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2021-02-19 20:28:14,963 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2021-02-19 20:28:15,234 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2021-02-19 20:28:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:15,857 INFO L93 Difference]: Finished difference Result 18280 states and 59487 transitions. [2021-02-19 20:28:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 20:28:15,859 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 20:28:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:15,896 INFO L225 Difference]: With dead ends: 18280 [2021-02-19 20:28:15,896 INFO L226 Difference]: Without dead ends: 17725 [2021-02-19 20:28:15,897 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1302, Invalid=5340, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:28:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2021-02-19 20:28:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 9958. [2021-02-19 20:28:16,146 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 20:28:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 33339 transitions. [2021-02-19 20:28:16,170 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 33339 transitions. Word has length 34 [2021-02-19 20:28:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:16,170 INFO L480 AbstractCegarLoop]: Abstraction has 9958 states and 33339 transitions. [2021-02-19 20:28:16,170 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 20:28:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 33339 transitions. [2021-02-19 20:28:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:16,184 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:16,184 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 20:28:16,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 20:28:16,385 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 423625651, now seen corresponding path program 31 times [2021-02-19 20:28:16,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:16,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431229639] [2021-02-19 20:28:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:16,895 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 20:28:16,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431229639] [2021-02-19 20:28:16,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347928499] [2021-02-19 20:28:16,896 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 20:28:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:28:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:17,526 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:28:17,804 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:28:18,275 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:28:18,627 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-02-19 20:28:18,843 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:28:19,109 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 20:28:19,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:19,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:28:19,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706611221] [2021-02-19 20:28:19,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:28:19,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:28:19,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:28:19,113 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 20:28:19,347 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:28:19,606 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:28:20,127 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:28:20,288 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-02-19 20:28:20,806 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-02-19 20:28:21,099 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2021-02-19 20:28:21,351 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 20:28:21,910 WARN L202 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:28:22,417 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:22,976 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:28:23,561 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-02-19 20:28:23,911 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 20:28:24,432 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-02-19 20:28:24,824 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:28:25,052 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-02-19 20:28:25,204 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2021-02-19 20:28:25,407 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2021-02-19 20:28:25,940 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-02-19 20:28:26,123 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 29 [2021-02-19 20:28:26,267 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 29 [2021-02-19 20:28:26,447 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 30 [2021-02-19 20:28:26,633 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 30 [2021-02-19 20:28:26,878 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2021-02-19 20:28:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:26,940 INFO L93 Difference]: Finished difference Result 16297 states and 53481 transitions. [2021-02-19 20:28:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:28:26,942 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 20:28:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:26,972 INFO L225 Difference]: With dead ends: 16297 [2021-02-19 20:28:26,973 INFO L226 Difference]: Without dead ends: 15916 [2021-02-19 20:28:26,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1044, Invalid=3786, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:28:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2021-02-19 20:28:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 10158. [2021-02-19 20:28:27,157 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 20:28:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 34015 transitions. [2021-02-19 20:28:27,184 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 34015 transitions. Word has length 34 [2021-02-19 20:28:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:27,184 INFO L480 AbstractCegarLoop]: Abstraction has 10158 states and 34015 transitions. [2021-02-19 20:28:27,184 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 20:28:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 34015 transitions. [2021-02-19 20:28:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:27,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:27,199 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 20:28:27,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 20:28:27,399 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 736099063, now seen corresponding path program 32 times [2021-02-19 20:28:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447744816] [2021-02-19 20:28:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:27,989 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 20:28:27,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447744816] [2021-02-19 20:28:27,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013940433] [2021-02-19 20:28:27,990 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 20:28:28,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:28:28,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:28:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:28,571 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:28:28,812 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:28:29,315 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:28:29,824 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:28:29,979 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 20:28:29,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:29,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-02-19 20:28:29,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223055874] [2021-02-19 20:28:29,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:28:29,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:28:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:28:29,981 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 20:28:30,609 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2021-02-19 20:28:30,881 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 20:28:31,366 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 20:28:31,721 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 20:28:32,143 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:28:32,413 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-02-19 20:28:32,613 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-02-19 20:28:33,016 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:28:33,202 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:28:33,610 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:28:33,879 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:28:34,079 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-02-19 20:28:34,378 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 20:28:34,781 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:28:35,305 WARN L202 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-02-19 20:28:36,248 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:28:36,811 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:28:37,196 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-02-19 20:28:37,825 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:38,563 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:39,002 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 20:28:39,485 WARN L202 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:39,783 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 20:28:40,177 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:28:40,689 WARN L202 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 20:28:41,275 WARN L202 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 20:28:41,748 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:28:41,923 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 26 [2021-02-19 20:28:42,211 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 20:28:42,589 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2021-02-19 20:28:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:43,149 INFO L93 Difference]: Finished difference Result 19991 states and 65028 transitions. [2021-02-19 20:28:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 20:28:43,151 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 20:28:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:43,194 INFO L225 Difference]: With dead ends: 19991 [2021-02-19 20:28:43,195 INFO L226 Difference]: Without dead ends: 19643 [2021-02-19 20:28:43,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1992, Invalid=6380, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 20:28:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2021-02-19 20:28:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 10332. [2021-02-19 20:28:43,441 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 20:28:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10332 states to 10332 states and 34611 transitions. [2021-02-19 20:28:43,562 INFO L78 Accepts]: Start accepts. Automaton has 10332 states and 34611 transitions. Word has length 34 [2021-02-19 20:28:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:43,562 INFO L480 AbstractCegarLoop]: Abstraction has 10332 states and 34611 transitions. [2021-02-19 20:28:43,562 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 20:28:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 10332 states and 34611 transitions. [2021-02-19 20:28:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:43,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:43,579 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 20:28:43,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 20:28:43,780 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1361716345, now seen corresponding path program 33 times [2021-02-19 20:28:43,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:43,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68529998] [2021-02-19 20:28:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:44,469 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 20:28:44,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68529998] [2021-02-19 20:28:44,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966428432] [2021-02-19 20:28:44,470 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 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 20:28:44,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:28:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:28:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:45,076 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:28:45,703 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:28:46,238 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:28:46,422 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 20:28:46,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:46,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:28:46,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906743292] [2021-02-19 20:28:46,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:28:46,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:46,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:28:46,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:28:46,423 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 20:28:46,833 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-02-19 20:28:47,022 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 20:28:47,303 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:28:47,712 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2021-02-19 20:28:48,162 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:28:48,610 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 20:28:48,905 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-02-19 20:28:49,499 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:50,138 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:28:50,641 WARN L202 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:50,891 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 20:28:51,367 WARN L202 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 20:28:51,772 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 20:28:52,540 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:28:52,997 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:28:53,568 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2021-02-19 20:28:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:54,040 INFO L93 Difference]: Finished difference Result 17594 states and 58186 transitions. [2021-02-19 20:28:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:28:54,042 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 20:28:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:54,084 INFO L225 Difference]: With dead ends: 17594 [2021-02-19 20:28:54,084 INFO L226 Difference]: Without dead ends: 17255 [2021-02-19 20:28:54,085 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1002, Invalid=3554, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:28:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17255 states. [2021-02-19 20:28:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17255 to 11161. [2021-02-19 20:28:54,333 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 20:28:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37420 transitions. [2021-02-19 20:28:54,367 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37420 transitions. Word has length 34 [2021-02-19 20:28:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:54,367 INFO L480 AbstractCegarLoop]: Abstraction has 11161 states and 37420 transitions. [2021-02-19 20:28:54,368 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 20:28:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37420 transitions. [2021-02-19 20:28:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:54,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:54,385 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 20:28:54,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable509 [2021-02-19 20:28:54,586 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1468776133, now seen corresponding path program 34 times [2021-02-19 20:28:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:54,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936696481] [2021-02-19 20:28:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:55,362 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 20:28:55,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936696481] [2021-02-19 20:28:55,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425892137] [2021-02-19 20:28:55,362 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 20:28:55,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:28:55,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:28:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:56,138 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:28:56,402 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 20:28:57,036 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 20:28:57,647 WARN L202 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 20:28:57,860 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:28:57,982 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 20:28:57,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:57,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:28:57,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023024334] [2021-02-19 20:28:57,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:28:57,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:57,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:28:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:28:57,984 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 20:28:58,527 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2021-02-19 20:28:59,242 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:28:59,461 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2021-02-19 20:28:59,656 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-02-19 20:28:59,795 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-02-19 20:29:00,079 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:29:00,248 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-02-19 20:29:00,623 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 20:29:00,897 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-02-19 20:29:01,129 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:29:01,414 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-02-19 20:29:01,795 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:29:02,837 WARN L202 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:29:03,118 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-02-19 20:29:03,527 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:29:04,167 WARN L202 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:29:04,936 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 20:29:05,542 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-02-19 20:29:05,985 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 20:29:06,487 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-02-19 20:29:06,692 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 26 [2021-02-19 20:29:06,970 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-02-19 20:29:07,375 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 20:29:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:08,152 INFO L93 Difference]: Finished difference Result 19490 states and 64468 transitions. [2021-02-19 20:29:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 20:29:08,154 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 20:29:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:08,201 INFO L225 Difference]: With dead ends: 19490 [2021-02-19 20:29:08,201 INFO L226 Difference]: Without dead ends: 19142 [2021-02-19 20:29:08,202 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1421, Invalid=5221, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:29:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19142 states. [2021-02-19 20:29:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19142 to 11364. [2021-02-19 20:29:08,487 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 20:29:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 38082 transitions. [2021-02-19 20:29:08,520 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 38082 transitions. Word has length 34 [2021-02-19 20:29:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:08,520 INFO L480 AbstractCegarLoop]: Abstraction has 11364 states and 38082 transitions. [2021-02-19 20:29:08,520 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 20:29:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 38082 transitions. [2021-02-19 20:29:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:08,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:08,536 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 20:29:08,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:08,737 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -315329853, now seen corresponding path program 35 times [2021-02-19 20:29:08,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:08,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443182499] [2021-02-19 20:29:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:08,991 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 20:29:08,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443182499] [2021-02-19 20:29:08,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073219365] [2021-02-19 20:29:08,991 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 20:29:09,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:29:09,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:29:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:09,333 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 20:29:09,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:09,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2021-02-19 20:29:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712058224] [2021-02-19 20:29:09,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:29:09,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:09,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:29:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:29:09,335 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 20:29:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:10,411 INFO L93 Difference]: Finished difference Result 22280 states and 73862 transitions. [2021-02-19 20:29:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:29:10,413 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 20:29:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:10,466 INFO L225 Difference]: With dead ends: 22280 [2021-02-19 20:29:10,466 INFO L226 Difference]: Without dead ends: 22280 [2021-02-19 20:29:10,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:29:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22280 states. [2021-02-19 20:29:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22280 to 11571. [2021-02-19 20:29:10,729 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 20:29:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11571 states to 11571 states and 38754 transitions. [2021-02-19 20:29:10,756 INFO L78 Accepts]: Start accepts. Automaton has 11571 states and 38754 transitions. Word has length 34 [2021-02-19 20:29:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:10,756 INFO L480 AbstractCegarLoop]: Abstraction has 11571 states and 38754 transitions. [2021-02-19 20:29:10,756 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 20:29:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 11571 states and 38754 transitions. [2021-02-19 20:29:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:10,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:10,770 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 20:29:10,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-02-19 20:29:10,971 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash -534517053, now seen corresponding path program 36 times [2021-02-19 20:29:10,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:10,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014676679] [2021-02-19 20:29:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:11,253 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 20:29:11,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014676679] [2021-02-19 20:29:11,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994072737] [2021-02-19 20:29:11,253 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 20:29:11,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:29:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:29:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:11,685 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 20:29:11,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:11,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 18 [2021-02-19 20:29:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680465465] [2021-02-19 20:29:11,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:29:11,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:29:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:29:11,686 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 20:29:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:13,458 INFO L93 Difference]: Finished difference Result 15661 states and 51435 transitions. [2021-02-19 20:29:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 20:29:13,460 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 20:29:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:13,496 INFO L225 Difference]: With dead ends: 15661 [2021-02-19 20:29:13,496 INFO L226 Difference]: Without dead ends: 15661 [2021-02-19 20:29:13,497 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:29:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2021-02-19 20:29:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 4495. [2021-02-19 20:29:13,635 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 20:29:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 14906 transitions. [2021-02-19 20:29:13,646 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 14906 transitions. Word has length 34 [2021-02-19 20:29:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:13,646 INFO L480 AbstractCegarLoop]: Abstraction has 4495 states and 14906 transitions. [2021-02-19 20:29:13,646 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 20:29:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 14906 transitions. [2021-02-19 20:29:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:13,652 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:13,652 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 20:29:13,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:13,853 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 511365095, now seen corresponding path program 37 times [2021-02-19 20:29:13,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:13,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374154046] [2021-02-19 20:29:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:14,900 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 20:29:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374154046] [2021-02-19 20:29:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303618172] [2021-02-19 20:29:14,900 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 20:29:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:29:14,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:15,698 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:29:16,128 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 20:29:16,337 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 20:29:16,520 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:29:17,088 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:29:17,332 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:29:17,517 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 20:29:17,758 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:29:17,879 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 20:29:17,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:17,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:29:17,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670334470] [2021-02-19 20:29:17,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:29:17,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:29:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:29:17,880 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 20:29:18,213 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2021-02-19 20:29:18,873 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2021-02-19 20:29:19,244 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-02-19 20:29:19,458 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2021-02-19 20:29:19,764 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 20:29:20,120 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-02-19 20:29:20,547 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 20:29:21,051 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-02-19 20:29:21,553 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-02-19 20:29:21,889 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-02-19 20:29:22,623 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-19 20:29:23,408 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-02-19 20:29:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:24,184 INFO L93 Difference]: Finished difference Result 6194 states and 19767 transitions. [2021-02-19 20:29:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 20:29:24,186 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 20:29:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:24,198 INFO L225 Difference]: With dead ends: 6194 [2021-02-19 20:29:24,198 INFO L226 Difference]: Without dead ends: 6143 [2021-02-19 20:29:24,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=976, Invalid=3854, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:29:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-02-19 20:29:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 4529. [2021-02-19 20:29:24,270 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 20:29:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 15020 transitions. [2021-02-19 20:29:24,281 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 15020 transitions. Word has length 34 [2021-02-19 20:29:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:24,281 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 15020 transitions. [2021-02-19 20:29:24,282 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 20:29:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 15020 transitions. [2021-02-19 20:29:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:24,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:24,288 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 20:29:24,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-02-19 20:29:24,489 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1565534183, now seen corresponding path program 38 times [2021-02-19 20:29:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:24,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853165397] [2021-02-19 20:29:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:25,283 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 20:29:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853165397] [2021-02-19 20:29:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605570709] [2021-02-19 20:29:25,284 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 20:29:25,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:29:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:29:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:25,908 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:29:26,357 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:29:26,538 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 20:29:27,066 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:29:27,716 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 20:29:27,889 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 20:29:27,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:27,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:29:27,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354469278] [2021-02-19 20:29:27,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:29:27,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:29:27,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:29:27,891 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 20:29:28,249 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 20:29:28,597 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 20:29:28,767 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 20 [2021-02-19 20:29:29,017 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:29:29,325 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-02-19 20:29:29,745 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 20:29:30,139 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2021-02-19 20:29:30,823 WARN L202 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:29:30,969 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 20:29:31,239 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 20:29:31,453 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-02-19 20:29:31,875 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 20:29:32,578 WARN L202 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-02-19 20:29:32,962 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-02-19 20:29:33,945 WARN L202 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-02-19 20:29:34,231 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-02-19 20:29:34,412 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-02-19 20:29:34,571 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 20:29:35,078 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:29:35,778 WARN L202 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-02-19 20:29:35,963 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:29:36,168 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 20:29:36,408 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 20:29:36,742 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 20:29:37,082 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 20:29:37,621 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 20:29:38,235 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:29:38,715 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:29:39,696 WARN L202 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:29:40,324 WARN L202 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:29:40,577 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2021-02-19 20:29:41,111 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-02-19 20:29:41,357 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 20:29:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:41,916 INFO L93 Difference]: Finished difference Result 8533 states and 26925 transitions. [2021-02-19 20:29:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:29:41,918 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 20:29:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:41,936 INFO L225 Difference]: With dead ends: 8533 [2021-02-19 20:29:41,936 INFO L226 Difference]: Without dead ends: 8156 [2021-02-19 20:29:41,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1556, Invalid=5250, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:29:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-02-19 20:29:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4594. [2021-02-19 20:29:42,034 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 20:29:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 15222 transitions. [2021-02-19 20:29:42,047 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 15222 transitions. Word has length 34 [2021-02-19 20:29:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:42,047 INFO L480 AbstractCegarLoop]: Abstraction has 4594 states and 15222 transitions. [2021-02-19 20:29:42,047 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 20:29:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 15222 transitions. [2021-02-19 20:29:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:42,055 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:42,055 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 20:29:42,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-02-19 20:29:42,256 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1824003917, now seen corresponding path program 39 times [2021-02-19 20:29:42,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:42,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941085836] [2021-02-19 20:29:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:43,241 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 20:29:43,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941085836] [2021-02-19 20:29:43,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528710163] [2021-02-19 20:29:43,241 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 20:29:43,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:29:43,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:29:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:44,054 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:29:44,758 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:29:45,348 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:29:46,173 WARN L202 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-19 20:29:46,332 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 20:29:46,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:29:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109308926] [2021-02-19 20:29:46,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:29:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:29:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:29:46,333 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 20:29:46,667 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 20:29:47,182 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 20 [2021-02-19 20:29:47,419 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:29:47,714 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-02-19 20:29:48,134 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:29:48,468 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-19 20:29:49,150 WARN L202 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:29:49,455 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:29:49,799 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-02-19 20:29:50,490 WARN L202 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 20:29:51,574 WARN L202 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-02-19 20:29:51,898 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 20:29:52,496 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 20:29:52,836 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:29:53,465 WARN L202 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:29:53,759 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2021-02-19 20:29:54,209 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-19 20:29:54,855 WARN L202 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-02-19 20:29:55,562 WARN L202 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:29:56,109 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 20:29:56,495 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:29:56,783 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 20:29:57,295 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:29:57,999 WARN L202 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:29:58,242 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2021-02-19 20:29:59,054 WARN L202 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-02-19 20:29:59,454 WARN L202 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-02-19 20:29:59,749 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 20:30:00,162 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 20:30:00,695 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-02-19 20:30:01,392 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-02-19 20:30:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:01,448 INFO L93 Difference]: Finished difference Result 9230 states and 29300 transitions. [2021-02-19 20:30:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 20:30:01,451 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 20:30:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:01,498 INFO L225 Difference]: With dead ends: 9230 [2021-02-19 20:30:01,498 INFO L226 Difference]: Without dead ends: 8867 [2021-02-19 20:30:01,498 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1401, Invalid=6255, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:30:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-02-19 20:30:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 4763. [2021-02-19 20:30:01,593 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 20:30:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 15801 transitions. [2021-02-19 20:30:01,606 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 15801 transitions. Word has length 34 [2021-02-19 20:30:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:01,606 INFO L480 AbstractCegarLoop]: Abstraction has 4763 states and 15801 transitions. [2021-02-19 20:30:01,606 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 20:30:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 15801 transitions. [2021-02-19 20:30:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:01,613 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:01,613 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 20:30:01,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:01,814 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1752068229, now seen corresponding path program 40 times [2021-02-19 20:30:01,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:01,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371473729] [2021-02-19 20:30:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:02,556 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 20:30:02,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371473729] [2021-02-19 20:30:02,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824321635] [2021-02-19 20:30:02,556 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 20:30:02,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:30:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:30:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:03,318 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:30:04,195 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 20:30:04,709 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:30:05,133 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:30:05,742 WARN L202 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 20:30:05,975 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 20:30:06,082 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 20:30:06,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:06,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:30:06,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280312164] [2021-02-19 20:30:06,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:30:06,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:06,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:30:06,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:30:06,084 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 20:30:06,865 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 20 [2021-02-19 20:30:07,138 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-02-19 20:30:07,436 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-02-19 20:30:07,912 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 20:30:08,143 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-19 20:30:08,488 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-19 20:30:09,012 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2021-02-19 20:30:09,667 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2021-02-19 20:30:10,344 WARN L202 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 20:30:10,713 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 20:30:10,903 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-02-19 20:30:11,072 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-02-19 20:30:11,321 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2021-02-19 20:30:11,474 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-02-19 20:30:11,900 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 20:30:12,385 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:30:12,859 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2021-02-19 20:30:13,038 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 24 [2021-02-19 20:30:13,601 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:30:14,014 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:30:14,805 WARN L202 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 20:30:15,152 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-02-19 20:30:15,923 WARN L202 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-02-19 20:30:16,441 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-02-19 20:30:16,692 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 20:30:16,998 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-02-19 20:30:17,261 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-02-19 20:30:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:17,431 INFO L93 Difference]: Finished difference Result 6810 states and 21741 transitions. [2021-02-19 20:30:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:30:17,433 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 20:30:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:17,447 INFO L225 Difference]: With dead ends: 6810 [2021-02-19 20:30:17,447 INFO L226 Difference]: Without dead ends: 6729 [2021-02-19 20:30:17,448 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1297, Invalid=5023, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:30:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-02-19 20:30:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 4745. [2021-02-19 20:30:17,552 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 20:30:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 15767 transitions. [2021-02-19 20:30:17,565 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 15767 transitions. Word has length 34 [2021-02-19 20:30:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:17,565 INFO L480 AbstractCegarLoop]: Abstraction has 4745 states and 15767 transitions. [2021-02-19 20:30:17,565 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 20:30:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 15767 transitions. [2021-02-19 20:30:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:17,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:17,574 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 20:30:17,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:17,774 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2012883063, now seen corresponding path program 41 times [2021-02-19 20:30:17,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:17,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074437989] [2021-02-19 20:30:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:18,837 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 20:30:18,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074437989] [2021-02-19 20:30:18,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431840170] [2021-02-19 20:30:18,838 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 20:30:18,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:30:18,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:30:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:20,332 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:30:20,870 WARN L202 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:30:21,162 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:30:21,635 WARN L202 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:30:22,396 WARN L202 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:30:22,670 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 20:30:22,797 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 20:30:22,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:22,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:30:22,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524883282] [2021-02-19 20:30:22,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:30:22,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:30:22,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:30:22,799 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 20:30:23,784 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 20:30:24,148 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-02-19 20:30:24,443 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2021-02-19 20:30:24,787 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 20:30:25,008 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 20:30:25,381 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2021-02-19 20:30:25,831 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2021-02-19 20:30:26,195 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 20:30:26,506 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 20:30:27,273 WARN L202 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-02-19 20:30:27,791 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-02-19 20:30:28,117 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-02-19 20:30:28,465 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-02-19 20:30:28,698 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 20:30:29,326 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 28 [2021-02-19 20:30:29,541 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:30:30,410 WARN L202 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-02-19 20:30:30,987 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 20:30:31,385 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 20:30:32,273 WARN L202 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:30:32,968 WARN L202 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:30:33,438 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 20:30:34,195 WARN L202 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-02-19 20:30:35,234 WARN L202 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-02-19 20:30:35,860 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:30:36,349 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-02-19 20:30:36,990 WARN L202 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 20:30:37,620 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 20:30:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:37,784 INFO L93 Difference]: Finished difference Result 7630 states and 24453 transitions. [2021-02-19 20:30:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 20:30:37,787 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 20:30:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:37,805 INFO L225 Difference]: With dead ends: 7630 [2021-02-19 20:30:37,805 INFO L226 Difference]: Without dead ends: 7555 [2021-02-19 20:30:37,806 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1217, Invalid=4483, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 20:30:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7555 states. [2021-02-19 20:30:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7555 to 4865. [2021-02-19 20:30:37,900 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 20:30:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 16189 transitions. [2021-02-19 20:30:37,913 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 16189 transitions. Word has length 34 [2021-02-19 20:30:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:37,914 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 16189 transitions. [2021-02-19 20:30:37,914 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 20:30:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 16189 transitions. [2021-02-19 20:30:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:37,921 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:37,921 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 20:30:38,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable635,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:38,122 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:38,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1855799415, now seen corresponding path program 42 times [2021-02-19 20:30:38,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:38,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170992553] [2021-02-19 20:30:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:39,159 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 20:30:39,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170992553] [2021-02-19 20:30:39,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664180482] [2021-02-19 20:30:39,160 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 20:30:39,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:30:39,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:30:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:39,833 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:30:40,186 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:30:40,412 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:30:40,643 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 20:30:41,220 WARN L202 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:30:41,662 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:30:42,496 WARN L202 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 20:30:42,763 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 20:30:42,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:42,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:30:42,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894511677] [2021-02-19 20:30:42,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:30:42,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:30:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:30:42,765 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 20:30:43,268 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 20:30:43,530 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 20:30:43,771 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 20:30:44,020 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 20:30:44,689 WARN L202 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 20:30:45,260 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 20:30:45,819 WARN L202 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 20:30:46,129 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 20:30:46,325 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 20:30:47,059 WARN L202 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 20:30:47,505 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:30:47,787 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-02-19 20:30:49,004 WARN L202 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 20:30:49,684 WARN L202 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:30:49,927 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 20:30:50,614 WARN L202 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-02-19 20:30:51,423 WARN L202 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:30:52,386 WARN L202 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:30:53,183 WARN L202 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:30:53,672 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:30:54,444 WARN L202 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:30:55,021 WARN L202 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:30:55,475 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 20:30:55,776 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 20:30:56,272 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 30 [2021-02-19 20:30:56,683 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 20:30:57,074 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:30:57,219 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-02-19 20:30:57,409 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-02-19 20:30:57,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:57,561 INFO L93 Difference]: Finished difference Result 9314 states and 29855 transitions. [2021-02-19 20:30:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 20:30:57,564 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 20:30:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:57,583 INFO L225 Difference]: With dead ends: 9314 [2021-02-19 20:30:57,584 INFO L226 Difference]: Without dead ends: 8901 [2021-02-19 20:30:57,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=889, Invalid=3803, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:30:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2021-02-19 20:30:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 4749. [2021-02-19 20:30:57,688 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 20:30:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 15783 transitions. [2021-02-19 20:30:57,701 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 15783 transitions. Word has length 34 [2021-02-19 20:30:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:57,701 INFO L480 AbstractCegarLoop]: Abstraction has 4749 states and 15783 transitions. [2021-02-19 20:30:57,701 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 20:30:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 15783 transitions. [2021-02-19 20:30:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:57,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:57,709 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 20:30:57,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-02-19 20:30:57,910 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash 853042919, now seen corresponding path program 43 times [2021-02-19 20:30:57,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:57,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88545106] [2021-02-19 20:30:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:58,960 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 20:30:58,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88545106] [2021-02-19 20:30:58,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510577975] [2021-02-19 20:30:58,960 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 20:30:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:30:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:59,716 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:30:59,975 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:31:00,223 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:31:00,821 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:31:01,604 WARN L202 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 20:31:02,051 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:31:02,425 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:31:02,732 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 20:31:03,093 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 20:31:03,246 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 20:31:03,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:31:03,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:31:03,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005312626] [2021-02-19 20:31:03,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:31:03,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:31:03,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:31:03,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:31:03,247 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 20:31:03,753 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 20:31:04,004 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 20:31:04,353 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2021-02-19 20:31:04,821 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 20:31:05,681 WARN L202 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 20:31:06,088 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 20:31:06,325 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 20:31:07,081 WARN L202 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:31:07,385 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 20:31:08,317 WARN L202 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-02-19 20:31:09,071 WARN L202 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:31:09,263 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 20:31:09,486 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 20:31:09,857 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:31:10,295 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 20:31:10,475 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-02-19 20:31:10,691 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 20:31:11,270 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-02-19 20:31:11,967 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-02-19 20:31:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:31:12,040 INFO L93 Difference]: Finished difference Result 6107 states and 19749 transitions. [2021-02-19 20:31:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:31:12,044 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 20:31:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:31:12,056 INFO L225 Difference]: With dead ends: 6107 [2021-02-19 20:31:12,057 INFO L226 Difference]: Without dead ends: 6035 [2021-02-19 20:31:12,057 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=654, Invalid=2886, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:31:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6035 states. [2021-02-19 20:31:12,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6035 to 4777. [2021-02-19 20:31:12,146 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 20:31:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 15875 transitions. [2021-02-19 20:31:12,159 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 15875 transitions. Word has length 34 [2021-02-19 20:31:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:31:12,160 INFO L480 AbstractCegarLoop]: Abstraction has 4777 states and 15875 transitions. [2021-02-19 20:31:12,160 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 20:31:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 15875 transitions. [2021-02-19 20:31:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:31:12,168 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:31:12,168 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 20:31:12,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-02-19 20:31:12,368 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:31:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:31:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash 633855719, now seen corresponding path program 44 times [2021-02-19 20:31:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:31:12,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601204523] [2021-02-19 20:31:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:31:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:31:13,555 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 20:31:13,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601204523] [2021-02-19 20:31:13,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703391978] [2021-02-19 20:31:13,556 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 20:31:13,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:31:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:31:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:31:13,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:31:14,494 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:31:14,684 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:31:15,148 WARN L202 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:31:15,791 WARN L202 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 20:31:16,159 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:31:17,224 WARN L202 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 20:31:17,425 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 20:31:17,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:31:17,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:31:17,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363103226] [2021-02-19 20:31:17,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:31:17,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:31:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:31:17,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:31:17,427 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 20:31:17,924 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-02-19 20:31:18,326 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2021-02-19 20:31:18,545 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 20 [2021-02-19 20:31:18,777 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 20:31:19,175 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 20:31:20,046 WARN L202 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:31:20,423 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2021-02-19 20:31:21,155 WARN L202 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 20:31:21,364 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 20:31:21,562 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 20:31:21,890 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:31:22,766 WARN L202 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 20:31:23,389 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:31:23,845 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32 [2021-02-19 20:31:24,438 WARN L202 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:31:24,888 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2021-02-19 20:31:25,107 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-02-19 20:31:25,293 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 20:31:26,045 WARN L202 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-02-19 20:31:26,240 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 20:31:27,226 WARN L202 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-02-19 20:31:27,981 WARN L202 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:31:28,655 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:31:29,019 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2021-02-19 20:31:29,876 WARN L202 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-02-19 20:31:30,848 WARN L202 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-02-19 20:31:31,075 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 20:31:31,945 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:31:32,899 WARN L202 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-02-19 20:31:33,939 WARN L202 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 20:31:35,202 WARN L202 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:31:35,919 WARN L202 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:31:36,584 WARN L202 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:31:36,760 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 20:31:37,620 WARN L202 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:31:38,616 WARN L202 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:31:39,358 WARN L202 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:31:39,606 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 20:31:40,244 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 25 [2021-02-19 20:31:40,597 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 20:31:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:31:41,152 INFO L93 Difference]: Finished difference Result 9037 states and 28848 transitions. [2021-02-19 20:31:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 20:31:41,154 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 20:31:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:31:41,173 INFO L225 Difference]: With dead ends: 9037 [2021-02-19 20:31:41,174 INFO L226 Difference]: Without dead ends: 8660 [2021-02-19 20:31:41,174 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1783, Invalid=5873, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:31:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-02-19 20:31:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 4935. [2021-02-19 20:31:41,287 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 20:31:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 16433 transitions. [2021-02-19 20:31:41,303 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 16433 transitions. Word has length 34 [2021-02-19 20:31:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:31:41,303 INFO L480 AbstractCegarLoop]: Abstraction has 4935 states and 16433 transitions. [2021-02-19 20:31:41,303 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 20:31:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 16433 transitions. [2021-02-19 20:31:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:31:41,311 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:31:41,312 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 20:31:41,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-02-19 20:31:41,512 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:31:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:31:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1342437845, now seen corresponding path program 45 times [2021-02-19 20:31:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:31:41,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557067507] [2021-02-19 20:31:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:31:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:31:42,586 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 20:31:42,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557067507] [2021-02-19 20:31:42,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119851572] [2021-02-19 20:31:42,586 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 20:31:42,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:31:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:31:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:31:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:31:43,740 WARN L202 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:31:44,001 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:31:44,630 WARN L202 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:31:45,450 WARN L202 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 20:31:46,587 WARN L202 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 20:31:47,146 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 20:31:47,425 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 20:31:47,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:31:47,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-02-19 20:31:47,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182704229] [2021-02-19 20:31:47,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:31:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:31:47,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:31:47,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:31:47,426 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 20:31:47,953 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-02-19 20:31:48,166 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2021-02-19 20:31:48,459 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 20:31:48,743 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2021-02-19 20:31:49,036 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 20:31:49,314 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 20:31:49,581 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 20:31:50,879 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:31:51,227 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-02-19 20:31:51,771 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 20:31:52,021 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 20:31:52,248 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 20:31:52,575 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 20:31:53,404 WARN L202 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-19 20:31:53,834 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2021-02-19 20:31:54,524 WARN L202 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:31:55,743 WARN L202 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-19 20:31:56,005 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 20:31:57,184 WARN L202 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 20:31:58,231 WARN L202 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 20:31:58,537 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:31:59,741 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 20:32:00,069 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 20:32:00,815 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:32:01,938 WARN L202 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-02-19 20:32:03,134 WARN L202 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:32:03,382 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-02-19 20:32:03,784 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 20:32:04,178 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2021-02-19 20:32:04,632 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 24 [2021-02-19 20:32:05,090 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 20:32:05,524 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2021-02-19 20:32:05,881 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 26 [2021-02-19 20:32:06,108 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 20:32:06,427 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 20:32:06,657 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 20:32:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:32:06,720 INFO L93 Difference]: Finished difference Result 8732 states and 28120 transitions. [2021-02-19 20:32:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:32:06,722 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 20:32:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:32:06,742 INFO L225 Difference]: With dead ends: 8732 [2021-02-19 20:32:06,742 INFO L226 Difference]: Without dead ends: 8236 [2021-02-19 20:32:06,743 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1041, Invalid=3929, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:32:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-02-19 20:32:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 5049. [2021-02-19 20:32:06,855 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 20:32:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 16827 transitions. [2021-02-19 20:32:06,870 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 16827 transitions. Word has length 34 [2021-02-19 20:32:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:32:06,870 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 16827 transitions. [2021-02-19 20:32:06,870 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 20:32:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 16827 transitions. [2021-02-19 20:32:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:32:06,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:32:06,879 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 20:32:07,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-02-19 20:32:07,080 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:32:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:32:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash -329467213, now seen corresponding path program 46 times [2021-02-19 20:32:07,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:32:07,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490562365] [2021-02-19 20:32:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:32:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:32:08,298 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 20:32:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490562365] [2021-02-19 20:32:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116955242] [2021-02-19 20:32:08,299 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 20:32:08,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:32:08,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:32:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:32:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:32:09,080 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:32:09,323 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:32:09,611 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:32:10,259 WARN L202 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:32:10,619 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:32:11,469 WARN L202 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-02-19 20:32:12,782 WARN L202 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:32:13,180 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 20:32:13,386 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 20:32:13,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:32:13,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:32:13,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279046211] [2021-02-19 20:32:13,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:32:13,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:32:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:32:13,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:32:13,387 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 20:32:13,854 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 20:32:14,227 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 20:32:14,516 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:32:14,885 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-02-19 20:32:15,425 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2021-02-19 20:32:16,242 WARN L202 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 20:32:16,662 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 20:32:17,570 WARN L202 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:32:17,918 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 20:32:18,421 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 20:32:18,682 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 20:32:19,808 WARN L202 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:32:20,231 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-02-19 20:32:20,922 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-02-19 20:32:21,099 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 20:32:21,348 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 20:32:22,302 WARN L202 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:32:23,082 WARN L202 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-02-19 20:32:24,607 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:32:25,249 WARN L202 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-02-19 20:32:26,045 WARN L202 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-02-19 20:32:26,539 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2021-02-19 20:32:27,044 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-02-19 20:32:27,627 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 20:32:27,944 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 20:32:28,522 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-02-19 20:32:28,808 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-02-19 20:32:29,112 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 20:32:29,431 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-02-19 20:32:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:32:29,602 INFO L93 Difference]: Finished difference Result 9354 states and 30206 transitions. [2021-02-19 20:32:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:32:29,606 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 20:32:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:32:29,628 INFO L225 Difference]: With dead ends: 9354 [2021-02-19 20:32:29,628 INFO L226 Difference]: Without dead ends: 8950 [2021-02-19 20:32:29,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:32:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-02-19 20:32:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 5063. [2021-02-19 20:32:29,753 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 20:32:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 16863 transitions. [2021-02-19 20:32:29,768 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 16863 transitions. Word has length 34 [2021-02-19 20:32:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:32:29,768 INFO L480 AbstractCegarLoop]: Abstraction has 5063 states and 16863 transitions. [2021-02-19 20:32:29,768 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 20:32:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 16863 transitions. [2021-02-19 20:32:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:32:29,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:32:29,776 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 20:32:29,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:32:29,977 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:32:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:32:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash 49938551, now seen corresponding path program 47 times [2021-02-19 20:32:29,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:32:29,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455569332] [2021-02-19 20:32:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:32:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:32:31,138 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 20:32:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455569332] [2021-02-19 20:32:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558270191] [2021-02-19 20:32:31,138 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 20:32:31,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:32:31,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:32:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:32:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:32:32,264 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 20:32:32,962 WARN L202 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:32:33,310 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 20:32:33,697 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:32:34,576 WARN L202 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 20:32:35,037 WARN L202 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:32:35,415 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 20:32:35,898 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:32:36,133 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 20:32:36,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:32:36,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:32:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971362698] [2021-02-19 20:32:36,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:32:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:32:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:32:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:32:36,134 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 20:32:37,027 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 20:32:37,365 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2021-02-19 20:32:37,817 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-02-19 20:32:38,176 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-02-19 20:32:38,857 WARN L202 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 20:32:39,131 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 20:32:39,747 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-02-19 20:32:40,546 WARN L202 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:32:41,234 WARN L202 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 20:32:41,825 WARN L202 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 20:32:42,929 WARN L202 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 20:32:44,130 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2021-02-19 20:32:44,547 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-02-19 20:32:44,776 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2021-02-19 20:32:45,832 WARN L202 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 20:32:46,751 WARN L202 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:32:47,162 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-02-19 20:32:47,350 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 20:32:47,766 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 20:32:48,588 WARN L202 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:32:49,136 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-19 20:32:49,571 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-02-19 20:32:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:32:49,725 INFO L93 Difference]: Finished difference Result 8127 states and 26353 transitions. [2021-02-19 20:32:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:32:49,730 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 20:32:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:32:49,751 INFO L225 Difference]: With dead ends: 8127 [2021-02-19 20:32:49,751 INFO L226 Difference]: Without dead ends: 8055 [2021-02-19 20:32:49,751 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=758, Invalid=3402, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:32:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-02-19 20:32:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 5605. [2021-02-19 20:32:49,871 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 20:32:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 18687 transitions. [2021-02-19 20:32:49,888 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 18687 transitions. Word has length 34 [2021-02-19 20:32:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:32:49,889 INFO L480 AbstractCegarLoop]: Abstraction has 5605 states and 18687 transitions. [2021-02-19 20:32:49,889 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 20:32:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 18687 transitions. [2021-02-19 20:32:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:32:49,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:32:49,899 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 20:32:50,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable713 [2021-02-19 20:32:50,100 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:32:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:32:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash -169248649, now seen corresponding path program 48 times [2021-02-19 20:32:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:32:50,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021049103] [2021-02-19 20:32:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:32:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:32:51,496 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 20:32:51,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021049103] [2021-02-19 20:32:51,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313350943] [2021-02-19 20:32:51,496 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 20:32:51,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:32:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:32:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:32:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:32:52,418 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:32:52,908 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:32:53,601 WARN L202 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:32:53,990 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 20:32:54,384 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:32:55,284 WARN L202 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:32:56,641 WARN L202 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 20:32:56,917 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 20:32:56,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:32:56,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:32:56,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637602075] [2021-02-19 20:32:56,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:32:56,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:32:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:32:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:32:56,919 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 20:32:57,490 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 20:32:58,193 WARN L202 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-02-19 20:32:58,477 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-02-19 20:32:58,790 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 20 [2021-02-19 20:32:59,082 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-02-19 20:32:59,516 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 20:32:59,763 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2021-02-19 20:33:00,308 WARN L202 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 20:33:00,786 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 20:33:01,645 WARN L202 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:33:02,254 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2021-02-19 20:33:03,054 WARN L202 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-02-19 20:33:03,406 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2021-02-19 20:33:03,938 WARN L202 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 20:33:04,207 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-02-19 20:33:05,137 WARN L202 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-02-19 20:33:06,126 WARN L202 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:33:07,414 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-02-19 20:33:07,914 WARN L202 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:33:09,150 WARN L202 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-02-19 20:33:09,962 WARN L202 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-02-19 20:33:10,477 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-02-19 20:33:11,333 WARN L202 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:33:12,315 WARN L202 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 20:33:13,210 WARN L202 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 20:33:14,322 WARN L202 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-02-19 20:33:15,542 WARN L202 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:33:16,349 WARN L202 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:33:17,492 WARN L202 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-02-19 20:33:17,703 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-02-19 20:33:17,987 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 20:33:18,194 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 20:33:18,453 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 20:33:19,405 WARN L202 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:33:20,916 WARN L202 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-02-19 20:33:21,867 WARN L202 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-02-19 20:33:23,073 WARN L202 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:33:24,341 WARN L202 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:33:24,752 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2021-02-19 20:33:25,603 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-02-19 20:33:25,980 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 20:33:26,463 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2021-02-19 20:33:26,803 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 20:33:27,087 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 20:33:27,494 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-02-19 20:33:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:33:27,703 INFO L93 Difference]: Finished difference Result 10197 states and 32646 transitions. [2021-02-19 20:33:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:33:27,714 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 20:33:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:33:27,739 INFO L225 Difference]: With dead ends: 10197 [2021-02-19 20:33:27,739 INFO L226 Difference]: Without dead ends: 9791 [2021-02-19 20:33:27,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1370, Invalid=5110, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:33:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2021-02-19 20:33:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 5956. [2021-02-19 20:33:27,885 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 20:33:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 19886 transitions. [2021-02-19 20:33:27,902 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 19886 transitions. Word has length 34 [2021-02-19 20:33:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:33:27,903 INFO L480 AbstractCegarLoop]: Abstraction has 5956 states and 19886 transitions. [2021-02-19 20:33:27,903 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 20:33:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 19886 transitions. [2021-02-19 20:33:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:33:27,912 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:33:27,912 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 20:33:28,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:33:28,113 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:33:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:33:28,114 INFO L82 PathProgramCache]: Analyzing trace with hash 376109243, now seen corresponding path program 49 times [2021-02-19 20:33:28,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:33:28,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725203415] [2021-02-19 20:33:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:33:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-02-19 20:33:29,516 WARN L219 SmtUtils]: Removed 2 from assertion stack [2021-02-19 20:33:29,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741 [2021-02-19 20:33:29,519 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:33:29,523 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:33:29,523 INFO L202 PluginConnector]: Adding new model threaded-sum-3-v9T.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:33:29 BasicIcfg [2021-02-19 20:33:29,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:33:29,524 INFO L168 Benchmark]: Toolchain (without parser) took 509829.90 ms. Allocated memory was 255.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 236.2 MB in the beginning and 877.5 MB in the end (delta: -641.3 MB). Peak memory consumption was 441.6 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:29,524 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:33:29,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.34 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:33:29,524 INFO L168 Benchmark]: Boogie Preprocessor took 21.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 970.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:29,524 INFO L168 Benchmark]: RCFGBuilder took 472.66 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 235.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:29,524 INFO L168 Benchmark]: TraceAbstraction took 509295.09 ms. Allocated memory was 255.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 235.0 MB in the beginning and 877.5 MB in the end (delta: -642.5 MB). Peak memory consumption was 438.5 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:29,524 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 0.18 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.34 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 970.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 472.66 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 235.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 509295.09 ms. Allocated memory was 255.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 235.0 MB in the beginning and 877.5 MB in the end (delta: -642.5 MB). Peak memory consumption was 438.5 MB. 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 analyzing trace of length 35 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 16 for 31ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 509.1s, OverallIterations: 52, TraceHistogramMax: 3, AutomataDifference: 365.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1628 SDtfs, 24733 SDslu, 20973 SDs, 0 SdLazy, 40961 SolverSat, 11148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4121 GetRequests, 871 SyntacticMatches, 109 SemanticMatches, 3141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68441 ImplicationChecksByTransitivity, 398.8s 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: 6.9s AutomataMinimizationTime, 51 MinimizatonAttempts, 178433 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 122.5s InterpolantComputationTime, 3267 NumberOfCodeBlocks, 3267 NumberOfCodeBlocksAsserted, 192 NumberOfCheckSat, 3169 ConstructedInterpolants, 0 QuantifiedInterpolants, 3514223 SizeOfPredicates, 307 NumberOfNonLiveVariables, 2947 ConjunctsInSsa, 935 ConjunctsInUnsatCore, 98 InterpolantComputations, 4 PerfectInterpolantSequences, 26/1260 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