/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/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:21:05,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:21:05,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:21:05,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:21:05,451 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 [2021-03-10 22:21:05,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:21:05,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:21:05,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:21:05,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:21:05,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:21:05,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:21:05,491 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:21:05,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:21:05,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:21:05,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:21:05,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:21:05,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:21:05,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:21:05,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:21:05,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:21:05,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:21:05,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:21:05,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:21:05,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:21:05,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:21:05,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:21:05,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:21:05,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:21:05,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:21:05,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:21:05,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:21:05,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:21:05,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:21:05,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:21:05,496 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:21:05,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:21:05,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:21:05,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:21:05,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:21:05,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:21:05,874 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:21:05,879 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:21:05,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-03-10 22:21:05,881 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-03-10 22:21:06,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:21:06,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:21:06,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:21:06,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:21:06,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:21:06,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:21:06,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:21:06,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:21:06,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:21:06,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/1) ... [2021-03-10 22:21:06,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:21:06,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:21:06,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:21:06,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:21:06,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (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 [2021-03-10 22:21:06,269 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:21:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:21:06,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:21:06,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:21:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:21:06,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:21:06,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:21:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:21:06,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:21:06,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:21:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:21:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:21:06,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:21:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:21:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:21:06,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-03-10 22:21:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-03-10 22:21:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-03-10 22:21:06,272 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:21:06,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:21:06,479 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:21:06,480 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:21:06 BoogieIcfgContainer [2021-03-10 22:21:06,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:21:06,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:21:06,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:21:06,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:21:06,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:21:06" (1/2) ... [2021-03-10 22:21:06,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467284b5 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:21:06, skipping insertion in model container [2021-03-10 22:21:06,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:21:06" (2/2) ... [2021-03-10 22:21:06,486 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-03-10 22:21:06,490 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:21:06,490 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:21:06,493 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:21:06,493 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:21:06,576 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-03-10 22:21:06,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-10 22:21:06,607 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:21:06,607 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:21:06,608 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:21:06,608 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:21:06,608 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:21:06,608 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:21:06,608 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:21:06,608 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:21:06,616 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-03-10 22:21:07,129 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:21:07,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:07,239 INFO L519 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] [2021-03-10 22:21:07,239 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:07,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-03-10 22:21:07,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:07,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028757898] [2021-03-10 22:21:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028757898] [2021-03-10 22:21:07,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:07,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:21:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907393114] [2021-03-10 22:21:07,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:21:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:21:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:07,561 INFO L87 Difference]: Start difference. First operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:08,100 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-03-10 22:21:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:21:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:21:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:08,454 INFO L225 Difference]: With dead ends: 23171 [2021-03-10 22:21:08,455 INFO L226 Difference]: Without dead ends: 15763 [2021-03-10 22:21:08,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-03-10 22:21:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-03-10 22:21:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-03-10 22:21:09,151 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-03-10 22:21:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:09,151 INFO L480 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-03-10 22:21:09,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-03-10 22:21:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:21:09,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:09,286 INFO L519 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] [2021-03-10 22:21:09,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:21:09,287 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:09,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-03-10 22:21:09,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:09,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746095695] [2021-03-10 22:21:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:09,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746095695] [2021-03-10 22:21:09,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:09,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:09,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975225317] [2021-03-10 22:21:09,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:09,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:09,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:09,358 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:09,538 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-03-10 22:21:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:21:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:09,597 INFO L225 Difference]: With dead ends: 9446 [2021-03-10 22:21:09,597 INFO L226 Difference]: Without dead ends: 6583 [2021-03-10 22:21:09,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-03-10 22:21:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-03-10 22:21:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-03-10 22:21:10,013 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-03-10 22:21:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:10,014 INFO L480 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-03-10 22:21:10,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-03-10 22:21:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:21:10,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:10,039 INFO L519 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] [2021-03-10 22:21:10,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:21:10,040 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-03-10 22:21:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:10,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746379535] [2021-03-10 22:21:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:10,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746379535] [2021-03-10 22:21:10,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:10,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:21:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861888267] [2021-03-10 22:21:10,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:21:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:21:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:10,099 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:10,477 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-03-10 22:21:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:21:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:21:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:10,599 INFO L225 Difference]: With dead ends: 22801 [2021-03-10 22:21:10,599 INFO L226 Difference]: Without dead ends: 16593 [2021-03-10 22:21:10,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-03-10 22:21:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-03-10 22:21:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-03-10 22:21:11,080 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-03-10 22:21:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:11,081 INFO L480 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-03-10 22:21:11,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-03-10 22:21:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:21:11,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:11,106 INFO L519 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] [2021-03-10 22:21:11,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:21:11,106 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-03-10 22:21:11,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:11,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043002457] [2021-03-10 22:21:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:11,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043002457] [2021-03-10 22:21:11,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:11,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:11,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981880989] [2021-03-10 22:21:11,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:11,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:11,148 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:11,341 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-03-10 22:21:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:21:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:11,397 INFO L225 Difference]: With dead ends: 8424 [2021-03-10 22:21:11,397 INFO L226 Difference]: Without dead ends: 6361 [2021-03-10 22:21:11,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-03-10 22:21:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-03-10 22:21:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-03-10 22:21:11,616 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-03-10 22:21:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:11,617 INFO L480 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-03-10 22:21:11,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-03-10 22:21:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:11,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:11,642 INFO L519 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, 1, 1] [2021-03-10 22:21:11,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:21:11,643 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-03-10 22:21:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:11,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494637280] [2021-03-10 22:21:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:11,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494637280] [2021-03-10 22:21:11,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141865289] [2021-03-10 22:21:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:21:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:12,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:12,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 22:21:12,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929168972] [2021-03-10 22:21:12,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:21:12,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:21:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:21:12,008 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:12,224 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-03-10 22:21:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:21:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:12,341 INFO L225 Difference]: With dead ends: 13742 [2021-03-10 22:21:12,342 INFO L226 Difference]: Without dead ends: 13742 [2021-03-10 22:21:12,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:21:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-03-10 22:21:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-03-10 22:21:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-03-10 22:21:12,755 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-03-10 22:21:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:12,756 INFO L480 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-03-10 22:21:12,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-03-10 22:21:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:12,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:12,793 INFO L519 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, 1, 1] [2021-03-10 22:21:13,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:13,017 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:13,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-03-10 22:21:13,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:13,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218504941] [2021-03-10 22:21:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:13,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218504941] [2021-03-10 22:21:13,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195740177] [2021-03-10 22:21:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 22:21:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:21:13,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:13,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 22:21:13,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-03-10 22:21:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072479227] [2021-03-10 22:21:13,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:13,238 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:13,473 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-03-10 22:21:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:13,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:13,578 INFO L225 Difference]: With dead ends: 11412 [2021-03-10 22:21:13,578 INFO L226 Difference]: Without dead ends: 11118 [2021-03-10 22:21:13,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-03-10 22:21:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-03-10 22:21:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-03-10 22:21:13,869 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-03-10 22:21:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:13,869 INFO L480 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-03-10 22:21:13,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-03-10 22:21:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:13,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:13,892 INFO L519 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, 1, 1] [2021-03-10 22:21:14,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:14,103 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-03-10 22:21:14,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:14,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318057695] [2021-03-10 22:21:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:14,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318057695] [2021-03-10 22:21:14,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:14,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:14,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764342526] [2021-03-10 22:21:14,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:14,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:14,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:14,132 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:14,271 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-03-10 22:21:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:14,327 INFO L225 Difference]: With dead ends: 15516 [2021-03-10 22:21:14,328 INFO L226 Difference]: Without dead ends: 15386 [2021-03-10 22:21:14,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-03-10 22:21:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-03-10 22:21:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-03-10 22:21:14,775 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-03-10 22:21:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:14,775 INFO L480 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-03-10 22:21:14,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-03-10 22:21:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:14,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:14,811 INFO L519 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, 1, 1] [2021-03-10 22:21:14,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:21:14,812 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-03-10 22:21:14,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:14,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439650261] [2021-03-10 22:21:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:14,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439650261] [2021-03-10 22:21:14,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:14,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:14,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944120163] [2021-03-10 22:21:14,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:14,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:14,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:14,833 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:15,035 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-03-10 22:21:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:15,129 INFO L225 Difference]: With dead ends: 22857 [2021-03-10 22:21:15,129 INFO L226 Difference]: Without dead ends: 22667 [2021-03-10 22:21:15,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-03-10 22:21:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-03-10 22:21:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-03-10 22:21:15,773 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-03-10 22:21:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:15,773 INFO L480 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-03-10 22:21:15,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-03-10 22:21:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:15,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:15,810 INFO L519 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, 1, 1] [2021-03-10 22:21:15,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 22:21:15,811 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-03-10 22:21:15,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:15,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792132146] [2021-03-10 22:21:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:15,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792132146] [2021-03-10 22:21:15,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20141232] [2021-03-10 22:21:15,868 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 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 [2021-03-10 22:21:15,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:21:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:21:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:15,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:15,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-03-10 22:21:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868187944] [2021-03-10 22:21:15,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:21:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:21:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:15,995 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:17,122 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-03-10 22:21:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:21:17,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:17,301 INFO L225 Difference]: With dead ends: 64631 [2021-03-10 22:21:17,302 INFO L226 Difference]: Without dead ends: 50671 [2021-03-10 22:21:17,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:21:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-03-10 22:21:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-03-10 22:21:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-03-10 22:21:18,259 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-03-10 22:21:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:18,260 INFO L480 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-03-10 22:21:18,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-03-10 22:21:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:18,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:18,307 INFO L519 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, 1, 1] [2021-03-10 22:21:18,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:18,523 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:18,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-03-10 22:21:18,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:18,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813751156] [2021-03-10 22:21:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:18,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813751156] [2021-03-10 22:21:18,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:18,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972678562] [2021-03-10 22:21:18,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:18,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:18,561 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:18,767 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-03-10 22:21:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:18,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:18,853 INFO L225 Difference]: With dead ends: 27166 [2021-03-10 22:21:18,853 INFO L226 Difference]: Without dead ends: 26834 [2021-03-10 22:21:18,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-03-10 22:21:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-03-10 22:21:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-03-10 22:21:19,424 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-03-10 22:21:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:19,424 INFO L480 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-03-10 22:21:19,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-03-10 22:21:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:19,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:19,473 INFO L519 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, 1, 1] [2021-03-10 22:21:19,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 22:21:19,473 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1747092604, now seen corresponding path program 2 times [2021-03-10 22:21:19,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:19,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713996366] [2021-03-10 22:21:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713996366] [2021-03-10 22:21:19,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:19,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426806294] [2021-03-10 22:21:19,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:19,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:19,496 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:19,658 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-03-10 22:21:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:21:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:19,726 INFO L225 Difference]: With dead ends: 24325 [2021-03-10 22:21:19,726 INFO L226 Difference]: Without dead ends: 24325 [2021-03-10 22:21:19,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-03-10 22:21:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-03-10 22:21:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-03-10 22:21:20,245 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-03-10 22:21:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:20,246 INFO L480 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-03-10 22:21:20,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-03-10 22:21:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:20,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:20,286 INFO L519 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, 1, 1] [2021-03-10 22:21:20,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 22:21:20,286 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-03-10 22:21:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:20,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700337006] [2021-03-10 22:21:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:20,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700337006] [2021-03-10 22:21:20,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268087107] [2021-03-10 22:21:20,331 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 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 [2021-03-10 22:21:20,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:21:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:21:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:20,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:20,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-03-10 22:21:20,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412308975] [2021-03-10 22:21:20,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:21:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:21:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:20,481 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:21,667 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-03-10 22:21:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:21:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:21,776 INFO L225 Difference]: With dead ends: 67384 [2021-03-10 22:21:21,776 INFO L226 Difference]: Without dead ends: 35063 [2021-03-10 22:21:21,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:21:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-03-10 22:21:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-03-10 22:21:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19352 states, 19351 states have (on average 4.504315022479458) internal successors, (87163), 19351 states have internal predecessors, (87163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-03-10 22:21:22,416 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-03-10 22:21:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:22,416 INFO L480 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-03-10 22:21:22,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-03-10 22:21:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:22,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:22,455 INFO L519 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, 1, 1] [2021-03-10 22:21:22,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:22,655 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-03-10 22:21:22,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:22,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973816808] [2021-03-10 22:21:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:22,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973816808] [2021-03-10 22:21:22,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:22,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:21:22,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256345744] [2021-03-10 22:21:22,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:21:22,696 INFO L87 Difference]: Start difference. First operand 19352 states and 87163 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:22,837 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-03-10 22:21:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:22,900 INFO L225 Difference]: With dead ends: 20461 [2021-03-10 22:21:22,900 INFO L226 Difference]: Without dead ends: 19957 [2021-03-10 22:21:22,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-03-10 22:21:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-03-10 22:21:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 4.485086602844336) internal successors, (81050), 18071 states have internal predecessors, (81050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-03-10 22:21:23,495 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-03-10 22:21:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:23,495 INFO L480 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-03-10 22:21:23,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-03-10 22:21:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:23,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:23,531 INFO L519 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, 1, 1] [2021-03-10 22:21:23,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 22:21:23,531 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:23,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-03-10 22:21:23,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:23,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756850748] [2021-03-10 22:21:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:23,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756850748] [2021-03-10 22:21:23,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:21:23,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:21:23,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594433100] [2021-03-10 22:21:23,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:21:23,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:21:23,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:21:23,573 INFO L87 Difference]: Start difference. First operand 18072 states and 81050 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:23,764 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-03-10 22:21:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:21:23,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:23,826 INFO L225 Difference]: With dead ends: 21232 [2021-03-10 22:21:23,826 INFO L226 Difference]: Without dead ends: 20403 [2021-03-10 22:21:23,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:21:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-03-10 22:21:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-03-10 22:21:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 18469 states have (on average 4.4772321186853645) internal successors, (82690), 18469 states have internal predecessors, (82690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-03-10 22:21:24,401 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-03-10 22:21:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:24,401 INFO L480 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-03-10 22:21:24,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-03-10 22:21:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:21:24,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:24,437 INFO L519 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, 1, 1] [2021-03-10 22:21:24,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 22:21:24,437 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-03-10 22:21:24,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:24,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739770006] [2021-03-10 22:21:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:24,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739770006] [2021-03-10 22:21:24,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259754759] [2021-03-10 22:21:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:24,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:21:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:21:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:24,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 22:21:24,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-03-10 22:21:24,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396353758] [2021-03-10 22:21:24,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:21:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:21:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:24,558 INFO L87 Difference]: Start difference. First operand 18470 states and 82690 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:24,911 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-03-10 22:21:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:21:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:21:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:24,969 INFO L225 Difference]: With dead ends: 19318 [2021-03-10 22:21:24,970 INFO L226 Difference]: Without dead ends: 18640 [2021-03-10 22:21:24,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-03-10 22:21:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-03-10 22:21:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13099 states, 13098 states have (on average 4.455183997556879) internal successors, (58354), 13098 states have internal predecessors, (58354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-03-10 22:21:25,325 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-03-10 22:21:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:25,326 INFO L480 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-03-10 22:21:25,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-03-10 22:21:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:21:25,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:25,362 INFO L519 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, 1, 1, 1, 1, 1] [2021-03-10 22:21:25,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:21:25,563 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-03-10 22:21:25,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:25,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494413748] [2021-03-10 22:21:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:25,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494413748] [2021-03-10 22:21:25,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308811821] [2021-03-10 22:21:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-03-10 22:21:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:21:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:25,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:25,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-03-10 22:21:25,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230028136] [2021-03-10 22:21:25,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:21:25,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:21:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:25,748 INFO L87 Difference]: Start difference. First operand 13099 states and 58354 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:26,250 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-03-10 22:21:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:26,622 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-03-10 22:21:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:21:26,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:21:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:26,701 INFO L225 Difference]: With dead ends: 43919 [2021-03-10 22:21:26,702 INFO L226 Difference]: Without dead ends: 24373 [2021-03-10 22:21:26,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:21:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-03-10 22:21:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-03-10 22:21:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 4.517816028944194) internal successors, (41207), 9121 states have internal predecessors, (41207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-03-10 22:21:27,227 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-03-10 22:21:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:27,228 INFO L480 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-03-10 22:21:27,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-03-10 22:21:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:21:27,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:27,249 INFO L519 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:27,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:27,464 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-03-10 22:21:27,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:27,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228883857] [2021-03-10 22:21:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:27,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228883857] [2021-03-10 22:21:27,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171203479] [2021-03-10 22:21:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:21:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:27,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:27,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-03-10 22:21:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386087817] [2021-03-10 22:21:27,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:21:27,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:21:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:27,703 INFO L87 Difference]: Start difference. First operand 9122 states and 41207 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:29,012 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-03-10 22:21:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:21:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 22:21:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:29,128 INFO L225 Difference]: With dead ends: 33369 [2021-03-10 22:21:29,128 INFO L226 Difference]: Without dead ends: 23102 [2021-03-10 22:21:29,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 22:21:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-03-10 22:21:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-03-10 22:21:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.515595226155852) internal successors, (45025), 9971 states have internal predecessors, (45025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-03-10 22:21:29,488 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-03-10 22:21:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:29,488 INFO L480 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-03-10 22:21:29,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-03-10 22:21:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:21:29,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:29,508 INFO L519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:29,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:21:29,709 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-03-10 22:21:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:29,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709987385] [2021-03-10 22:21:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:29,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709987385] [2021-03-10 22:21:29,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333882386] [2021-03-10 22:21:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 22:21:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:21:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:29,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-03-10 22:21:29,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:29,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:29,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:29,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-03-10 22:21:29,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:21:29,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:29,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:29,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:29,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-03-10 22:21:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:29,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:29,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 22:21:29,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100604364] [2021-03-10 22:21:29,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:21:29,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:21:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:29,990 INFO L87 Difference]: Start difference. First operand 9972 states and 45025 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-03-10 22:21:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:30,407 INFO L93 Difference]: Finished difference Result 34243 states and 157744 transitions. [2021-03-10 22:21:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:21:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 39 [2021-03-10 22:21:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:30,474 INFO L225 Difference]: With dead ends: 34243 [2021-03-10 22:21:30,474 INFO L226 Difference]: Without dead ends: 24028 [2021-03-10 22:21:30,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:21:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24028 states. [2021-03-10 22:21:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24028 to 9804. [2021-03-10 22:21:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 4.534428236254208) internal successors, (44451), 9803 states have internal predecessors, (44451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-03-10 22:21:30,782 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-03-10 22:21:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:30,782 INFO L480 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-03-10 22:21:30,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-03-10 22:21:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-03-10 22:21:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:21:30,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:30,802 INFO L519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:31,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:21:31,003 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:31,003 INFO L82 PathProgramCache]: Analyzing trace with hash 95025711, now seen corresponding path program 2 times [2021-03-10 22:21:31,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:31,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115630813] [2021-03-10 22:21:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:31,177 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2021-03-10 22:21:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:31,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115630813] [2021-03-10 22:21:31,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526800651] [2021-03-10 22:21:31,262 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 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 [2021-03-10 22:21:31,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:21:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:21:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:31,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:21:31,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:31,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:31,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:31,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 22:21:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:31,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:31,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:21:31,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312609551] [2021-03-10 22:21:31,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:21:31,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:31,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:21:31,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:21:31,454 INFO L87 Difference]: Start difference. First operand 9804 states and 44451 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:31,828 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-03-10 22:21:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:21:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:21:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:31,872 INFO L225 Difference]: With dead ends: 32096 [2021-03-10 22:21:31,872 INFO L226 Difference]: Without dead ends: 16159 [2021-03-10 22:21:31,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:21:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-03-10 22:21:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-03-10 22:21:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 4.493828399397892) internal successors, (44781), 9965 states have internal predecessors, (44781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-03-10 22:21:32,260 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-03-10 22:21:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:32,260 INFO L480 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-03-10 22:21:32,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-03-10 22:21:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:21:32,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:32,282 INFO L519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:32,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:32,499 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:32,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1049367287, now seen corresponding path program 3 times [2021-03-10 22:21:32,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:32,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075882724] [2021-03-10 22:21:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:32,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075882724] [2021-03-10 22:21:32,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081541353] [2021-03-10 22:21:32,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:21:32,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:21:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:21:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:21:32,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:32,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:32,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:32,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 22:21:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:32,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:32,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:21:32,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691767147] [2021-03-10 22:21:32,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:21:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:21:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:21:32,731 INFO L87 Difference]: Start difference. First operand 9966 states and 44781 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:33,331 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-03-10 22:21:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:21:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:21:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:33,394 INFO L225 Difference]: With dead ends: 38248 [2021-03-10 22:21:33,394 INFO L226 Difference]: Without dead ends: 19645 [2021-03-10 22:21:33,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:21:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-03-10 22:21:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-03-10 22:21:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 4.496012611275964) internal successors, (48485), 10784 states have internal predecessors, (48485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-03-10 22:21:33,889 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-03-10 22:21:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:33,889 INFO L480 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-03-10 22:21:33,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-03-10 22:21:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:21:33,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:33,908 INFO L519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:34,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:34,109 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1500175273, now seen corresponding path program 4 times [2021-03-10 22:21:34,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:34,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619705858] [2021-03-10 22:21:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:34,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619705858] [2021-03-10 22:21:34,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711201410] [2021-03-10 22:21:34,291 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 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 [2021-03-10 22:21:34,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:21:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:21:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-03-10 22:21:34,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:34,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:34,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:34,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-03-10 22:21:34,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-03-10 22:21:34,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:34,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:34,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:34,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-03-10 22:21:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:21:34,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:34,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:34,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:34,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 22:21:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:34,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:34,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:21:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047402428] [2021-03-10 22:21:34,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:21:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:21:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:21:34,470 INFO L87 Difference]: Start difference. First operand 10785 states and 48485 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-03-10 22:21:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:35,489 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-03-10 22:21:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:21:35,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 39 [2021-03-10 22:21:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:35,534 INFO L225 Difference]: With dead ends: 29883 [2021-03-10 22:21:35,534 INFO L226 Difference]: Without dead ends: 17348 [2021-03-10 22:21:35,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:21:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-03-10 22:21:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-03-10 22:21:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 4.473569679934718) internal successors, (49339), 11029 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-03-10 22:21:35,762 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-03-10 22:21:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:35,762 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-03-10 22:21:35,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-03-10 22:21:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-03-10 22:21:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:21:35,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:35,782 INFO L519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:35,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:21:35,983 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1584459695, now seen corresponding path program 5 times [2021-03-10 22:21:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11275230] [2021-03-10 22:21:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:36,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11275230] [2021-03-10 22:21:36,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316371351] [2021-03-10 22:21:36,118 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 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 [2021-03-10 22:21:36,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:21:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:21:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:36,310 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-03-10 22:21:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-03-10 22:21:36,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:36,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:36,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:36,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-03-10 22:21:36,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:21:36,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:21:36,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:21:36,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:21:36,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-03-10 22:21:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:21:36,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:36,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 22:21:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680810050] [2021-03-10 22:21:36,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:21:36,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:36,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:21:36,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:21:36,397 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-03-10 22:21:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:37,429 INFO L93 Difference]: Finished difference Result 37384 states and 169706 transitions. [2021-03-10 22:21:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:21:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 39 [2021-03-10 22:21:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:37,483 INFO L225 Difference]: With dead ends: 37384 [2021-03-10 22:21:37,483 INFO L226 Difference]: Without dead ends: 20919 [2021-03-10 22:21:37,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 649.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:21:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20919 states. [2021-03-10 22:21:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20919 to 11315. [2021-03-10 22:21:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11315 states, 11314 states have (on average 4.472246773908432) internal successors, (50599), 11314 states have internal predecessors, (50599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-03-10 22:21:37,883 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-03-10 22:21:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:37,883 INFO L480 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-03-10 22:21:37,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-03-10 22:21:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-03-10 22:21:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:37,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:37,903 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:38,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 22:21:38,104 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1173646258, now seen corresponding path program 6 times [2021-03-10 22:21:38,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:38,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530307001] [2021-03-10 22:21:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:38,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530307001] [2021-03-10 22:21:38,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851140266] [2021-03-10 22:21:38,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:38,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:21:38,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:21:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:38,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:38,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:21:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825685573] [2021-03-10 22:21:38,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:21:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:38,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:21:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:38,273 INFO L87 Difference]: Start difference. First operand 11315 states and 50599 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:39,021 INFO L93 Difference]: Finished difference Result 38369 states and 174934 transitions. [2021-03-10 22:21:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:21:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:39,148 INFO L225 Difference]: With dead ends: 38369 [2021-03-10 22:21:39,148 INFO L226 Difference]: Without dead ends: 38168 [2021-03-10 22:21:39,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:21:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38168 states. [2021-03-10 22:21:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38168 to 27191. [2021-03-10 22:21:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27191 states, 27190 states have (on average 4.6368517837440235) internal successors, (126076), 27190 states have internal predecessors, (126076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27191 states to 27191 states and 126076 transitions. [2021-03-10 22:21:40,022 INFO L78 Accepts]: Start accepts. Automaton has 27191 states and 126076 transitions. Word has length 42 [2021-03-10 22:21:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:40,023 INFO L480 AbstractCegarLoop]: Abstraction has 27191 states and 126076 transitions. [2021-03-10 22:21:40,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 27191 states and 126076 transitions. [2021-03-10 22:21:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:40,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:40,080 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:40,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:21:40,281 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash 22210040, now seen corresponding path program 7 times [2021-03-10 22:21:40,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:40,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902610681] [2021-03-10 22:21:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:40,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902610681] [2021-03-10 22:21:40,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312156197] [2021-03-10 22:21:40,315 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 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 [2021-03-10 22:21:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:21:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:40,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:40,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:21:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374927298] [2021-03-10 22:21:40,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:21:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:21:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:21:40,430 INFO L87 Difference]: Start difference. First operand 27191 states and 126076 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:41,100 INFO L93 Difference]: Finished difference Result 51293 states and 237263 transitions. [2021-03-10 22:21:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:21:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:41,302 INFO L225 Difference]: With dead ends: 51293 [2021-03-10 22:21:41,302 INFO L226 Difference]: Without dead ends: 51193 [2021-03-10 22:21:41,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:21:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-03-10 22:21:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 32278. [2021-03-10 22:21:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32278 states, 32277 states have (on average 4.725191312699446) internal successors, (152515), 32277 states have internal predecessors, (152515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 152515 transitions. [2021-03-10 22:21:42,444 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 152515 transitions. Word has length 42 [2021-03-10 22:21:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:42,444 INFO L480 AbstractCegarLoop]: Abstraction has 32278 states and 152515 transitions. [2021-03-10 22:21:42,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 152515 transitions. [2021-03-10 22:21:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:42,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:42,511 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:42,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:42,712 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2076260328, now seen corresponding path program 8 times [2021-03-10 22:21:42,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:42,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225233628] [2021-03-10 22:21:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:42,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225233628] [2021-03-10 22:21:42,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810749000] [2021-03-10 22:21:42,739 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 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 [2021-03-10 22:21:42,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:21:42,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:42,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:21:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:43,103 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-03-10 22:21:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:43,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:43,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:21:43,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600766129] [2021-03-10 22:21:43,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:21:43,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:21:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:21:43,111 INFO L87 Difference]: Start difference. First operand 32278 states and 152515 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:43,486 INFO L93 Difference]: Finished difference Result 48003 states and 221808 transitions. [2021-03-10 22:21:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:21:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:43,654 INFO L225 Difference]: With dead ends: 48003 [2021-03-10 22:21:43,654 INFO L226 Difference]: Without dead ends: 48003 [2021-03-10 22:21:43,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48003 states. [2021-03-10 22:21:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48003 to 31277. [2021-03-10 22:21:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 4.717930681672848) internal successors, (147558), 31276 states have internal predecessors, (147558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 147558 transitions. [2021-03-10 22:21:44,836 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 147558 transitions. Word has length 42 [2021-03-10 22:21:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:44,836 INFO L480 AbstractCegarLoop]: Abstraction has 31277 states and 147558 transitions. [2021-03-10 22:21:44,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 147558 transitions. [2021-03-10 22:21:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:44,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:44,908 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:45,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:21:45,109 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash 31127056, now seen corresponding path program 9 times [2021-03-10 22:21:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:45,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520195287] [2021-03-10 22:21:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520195287] [2021-03-10 22:21:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817633398] [2021-03-10 22:21:45,134 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 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 [2021-03-10 22:21:45,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:21:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:21:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:45,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:45,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:21:45,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291343525] [2021-03-10 22:21:45,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:21:45,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:45,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:21:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:21:45,254 INFO L87 Difference]: Start difference. First operand 31277 states and 147558 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:46,069 INFO L93 Difference]: Finished difference Result 49855 states and 235447 transitions. [2021-03-10 22:21:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:21:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:46,254 INFO L225 Difference]: With dead ends: 49855 [2021-03-10 22:21:46,255 INFO L226 Difference]: Without dead ends: 49855 [2021-03-10 22:21:46,255 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:21:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49855 states. [2021-03-10 22:21:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49855 to 38527. [2021-03-10 22:21:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38527 states, 38526 states have (on average 4.734490993095572) internal successors, (182401), 38526 states have internal predecessors, (182401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38527 states to 38527 states and 182401 transitions. [2021-03-10 22:21:47,537 INFO L78 Accepts]: Start accepts. Automaton has 38527 states and 182401 transitions. Word has length 42 [2021-03-10 22:21:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:47,537 INFO L480 AbstractCegarLoop]: Abstraction has 38527 states and 182401 transitions. [2021-03-10 22:21:47,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 38527 states and 182401 transitions. [2021-03-10 22:21:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:47,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:47,625 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:47,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 22:21:47,826 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1944125966, now seen corresponding path program 10 times [2021-03-10 22:21:47,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:47,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476984569] [2021-03-10 22:21:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476984569] [2021-03-10 22:21:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523645283] [2021-03-10 22:21:47,869 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 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 [2021-03-10 22:21:48,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:21:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:21:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:48,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:48,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:21:48,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468773588] [2021-03-10 22:21:48,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:21:48,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:21:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:21:48,415 INFO L87 Difference]: Start difference. First operand 38527 states and 182401 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:49,009 INFO L93 Difference]: Finished difference Result 57928 states and 271996 transitions. [2021-03-10 22:21:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:21:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:49,311 INFO L225 Difference]: With dead ends: 57928 [2021-03-10 22:21:49,311 INFO L226 Difference]: Without dead ends: 57873 [2021-03-10 22:21:49,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:21:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57873 states. [2021-03-10 22:21:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57873 to 46202. [2021-03-10 22:21:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46202 states, 46201 states have (on average 4.814571113179368) internal successors, (222438), 46201 states have internal predecessors, (222438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46202 states to 46202 states and 222438 transitions. [2021-03-10 22:21:51,311 INFO L78 Accepts]: Start accepts. Automaton has 46202 states and 222438 transitions. Word has length 42 [2021-03-10 22:21:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:51,311 INFO L480 AbstractCegarLoop]: Abstraction has 46202 states and 222438 transitions. [2021-03-10 22:21:51,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 46202 states and 222438 transitions. [2021-03-10 22:21:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:51,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:51,453 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:51,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 22:21:51,655 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash 252370962, now seen corresponding path program 11 times [2021-03-10 22:21:51,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:51,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083457977] [2021-03-10 22:21:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:51,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083457977] [2021-03-10 22:21:51,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083043205] [2021-03-10 22:21:51,681 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 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 [2021-03-10 22:21:51,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:21:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:21:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:51,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:51,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:21:51,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821548799] [2021-03-10 22:21:51,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:21:51,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:21:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:21:51,774 INFO L87 Difference]: Start difference. First operand 46202 states and 222438 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:52,176 INFO L93 Difference]: Finished difference Result 58960 states and 278124 transitions. [2021-03-10 22:21:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:21:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:52,391 INFO L225 Difference]: With dead ends: 58960 [2021-03-10 22:21:52,392 INFO L226 Difference]: Without dead ends: 58960 [2021-03-10 22:21:52,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58960 states. [2021-03-10 22:21:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58960 to 46088. [2021-03-10 22:21:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46088 states, 46087 states have (on average 4.817866209560179) internal successors, (222041), 46087 states have internal predecessors, (222041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46088 states to 46088 states and 222041 transitions. [2021-03-10 22:21:54,395 INFO L78 Accepts]: Start accepts. Automaton has 46088 states and 222041 transitions. Word has length 42 [2021-03-10 22:21:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:54,396 INFO L480 AbstractCegarLoop]: Abstraction has 46088 states and 222041 transitions. [2021-03-10 22:21:54,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 46088 states and 222041 transitions. [2021-03-10 22:21:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:54,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:54,501 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:54,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:54,703 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash -484411891, now seen corresponding path program 12 times [2021-03-10 22:21:54,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:54,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782367732] [2021-03-10 22:21:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:54,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782367732] [2021-03-10 22:21:54,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737117286] [2021-03-10 22:21:54,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:54,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:21:54,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:21:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:21:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:21:54,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:54,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-03-10 22:21:54,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350232521] [2021-03-10 22:21:54,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:21:54,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:54,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:21:54,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:21:54,863 INFO L87 Difference]: Start difference. First operand 46088 states and 222041 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:21:56,177 INFO L93 Difference]: Finished difference Result 106867 states and 518023 transitions. [2021-03-10 22:21:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:21:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:21:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:21:56,653 INFO L225 Difference]: With dead ends: 106867 [2021-03-10 22:21:56,653 INFO L226 Difference]: Without dead ends: 100074 [2021-03-10 22:21:56,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:21:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100074 states. [2021-03-10 22:21:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100074 to 82289. [2021-03-10 22:21:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82289 states, 82288 states have (on average 4.968743923779895) internal successors, (408868), 82288 states have internal predecessors, (408868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82289 states to 82289 states and 408868 transitions. [2021-03-10 22:21:59,405 INFO L78 Accepts]: Start accepts. Automaton has 82289 states and 408868 transitions. Word has length 42 [2021-03-10 22:21:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:21:59,405 INFO L480 AbstractCegarLoop]: Abstraction has 82289 states and 408868 transitions. [2021-03-10 22:21:59,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:21:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 82289 states and 408868 transitions. [2021-03-10 22:21:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:21:59,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:21:59,616 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:21:59,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:21:59,817 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:21:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:21:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1118881297, now seen corresponding path program 13 times [2021-03-10 22:21:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:21:59,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839898082] [2021-03-10 22:21:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:21:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:59,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839898082] [2021-03-10 22:21:59,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5511466] [2021-03-10 22:21:59,844 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 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 [2021-03-10 22:21:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:21:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:21:59,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:21:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:21:59,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:21:59,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:21:59,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916984246] [2021-03-10 22:21:59,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:21:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:21:59,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:21:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:21:59,933 INFO L87 Difference]: Start difference. First operand 82289 states and 408868 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:22:02,384 INFO L93 Difference]: Finished difference Result 171117 states and 850897 transitions. [2021-03-10 22:22:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:22:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:22:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:22:03,254 INFO L225 Difference]: With dead ends: 171117 [2021-03-10 22:22:03,254 INFO L226 Difference]: Without dead ends: 170669 [2021-03-10 22:22:03,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:22:03,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170669 states. [2021-03-10 22:22:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170669 to 139277. [2021-03-10 22:22:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139277 states, 139276 states have (on average 5.115454206036934) internal successors, (712460), 139276 states have internal predecessors, (712460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139277 states to 139277 states and 712460 transitions. [2021-03-10 22:22:09,353 INFO L78 Accepts]: Start accepts. Automaton has 139277 states and 712460 transitions. Word has length 42 [2021-03-10 22:22:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:22:09,354 INFO L480 AbstractCegarLoop]: Abstraction has 139277 states and 712460 transitions. [2021-03-10 22:22:09,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 139277 states and 712460 transitions. [2021-03-10 22:22:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:22:09,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:22:09,803 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:22:10,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 22:22:10,003 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:22:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:22:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1908746831, now seen corresponding path program 14 times [2021-03-10 22:22:10,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:22:10,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220596219] [2021-03-10 22:22:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:22:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:22:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:22:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220596219] [2021-03-10 22:22:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228432480] [2021-03-10 22:22:10,032 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 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 [2021-03-10 22:22:10,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:22:10,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:22:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:22:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:22:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:22:10,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:22:10,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 22:22:10,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327887827] [2021-03-10 22:22:10,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:22:10,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:22:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:22:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:22:10,144 INFO L87 Difference]: Start difference. First operand 139277 states and 712460 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:22:13,113 INFO L93 Difference]: Finished difference Result 212818 states and 1026688 transitions. [2021-03-10 22:22:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 22:22:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:22:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:22:14,274 INFO L225 Difference]: With dead ends: 212818 [2021-03-10 22:22:14,274 INFO L226 Difference]: Without dead ends: 211851 [2021-03-10 22:22:14,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:22:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211851 states. [2021-03-10 22:22:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211851 to 133685. [2021-03-10 22:22:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133685 states, 133684 states have (on average 5.038531163041202) internal successors, (673571), 133684 states have internal predecessors, (673571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133685 states to 133685 states and 673571 transitions. [2021-03-10 22:22:21,107 INFO L78 Accepts]: Start accepts. Automaton has 133685 states and 673571 transitions. Word has length 42 [2021-03-10 22:22:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:22:21,107 INFO L480 AbstractCegarLoop]: Abstraction has 133685 states and 673571 transitions. [2021-03-10 22:22:21,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 133685 states and 673571 transitions. [2021-03-10 22:22:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:22:21,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:22:21,554 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:22:21,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:22:21,763 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:22:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:22:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1351857461, now seen corresponding path program 15 times [2021-03-10 22:22:21,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:22:21,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378594276] [2021-03-10 22:22:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:22:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:22:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:22:21,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378594276] [2021-03-10 22:22:21,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058551711] [2021-03-10 22:22:21,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:22:21,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:22:21,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:22:21,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:22:21,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:22:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:22:21,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:22:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-03-10 22:22:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799103232] [2021-03-10 22:22:21,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:22:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:22:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:22:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:22:21,884 INFO L87 Difference]: Start difference. First operand 133685 states and 673571 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:22:25,929 INFO L93 Difference]: Finished difference Result 313641 states and 1550703 transitions. [2021-03-10 22:22:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:22:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:22:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:22:28,477 INFO L225 Difference]: With dead ends: 313641 [2021-03-10 22:22:28,477 INFO L226 Difference]: Without dead ends: 311696 [2021-03-10 22:22:28,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:22:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311696 states. [2021-03-10 22:22:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311696 to 229056. [2021-03-10 22:22:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229056 states, 229055 states have (on average 5.171434808233831) internal successors, (1184543), 229055 states have internal predecessors, (1184543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229056 states to 229056 states and 1184543 transitions. [2021-03-10 22:22:40,460 INFO L78 Accepts]: Start accepts. Automaton has 229056 states and 1184543 transitions. Word has length 42 [2021-03-10 22:22:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:22:40,460 INFO L480 AbstractCegarLoop]: Abstraction has 229056 states and 1184543 transitions. [2021-03-10 22:22:40,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 229056 states and 1184543 transitions. [2021-03-10 22:22:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:22:42,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:22:42,650 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:22:42,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:22:42,850 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:22:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:22:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash -283886853, now seen corresponding path program 16 times [2021-03-10 22:22:42,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:22:42,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005763546] [2021-03-10 22:22:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:22:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:22:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:22:42,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005763546] [2021-03-10 22:22:42,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137073520] [2021-03-10 22:22:42,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:22:43,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:22:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:22:43,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:22:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:22:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:22:43,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:22:43,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:22:43,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877628602] [2021-03-10 22:22:43,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:22:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:22:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:22:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:22:43,090 INFO L87 Difference]: Start difference. First operand 229056 states and 1184543 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:22:46,338 INFO L93 Difference]: Finished difference Result 262532 states and 1335373 transitions. [2021-03-10 22:22:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:22:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:22:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:22:49,568 INFO L225 Difference]: With dead ends: 262532 [2021-03-10 22:22:49,568 INFO L226 Difference]: Without dead ends: 262134 [2021-03-10 22:22:49,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:22:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262134 states. [2021-03-10 22:22:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262134 to 232050. [2021-03-10 22:22:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232050 states, 232049 states have (on average 5.1655986451137474) internal successors, (1198672), 232049 states have internal predecessors, (1198672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232050 states to 232050 states and 1198672 transitions. [2021-03-10 22:22:59,977 INFO L78 Accepts]: Start accepts. Automaton has 232050 states and 1198672 transitions. Word has length 42 [2021-03-10 22:22:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:22:59,977 INFO L480 AbstractCegarLoop]: Abstraction has 232050 states and 1198672 transitions. [2021-03-10 22:22:59,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:22:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 232050 states and 1198672 transitions. [2021-03-10 22:23:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:23:01,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:23:01,664 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:23:01,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:23:01,879 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:23:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:23:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash -2135445797, now seen corresponding path program 17 times [2021-03-10 22:23:01,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:23:01,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895320161] [2021-03-10 22:23:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:23:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:23:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:23:01,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895320161] [2021-03-10 22:23:01,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299855966] [2021-03-10 22:23:01,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:23:01,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:23:01,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:23:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:23:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:23:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:23:02,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:23:02,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 22:23:02,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273594590] [2021-03-10 22:23:02,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:23:02,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:23:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:23:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:23:02,044 INFO L87 Difference]: Start difference. First operand 232050 states and 1198672 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:23:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:23:08,428 INFO L93 Difference]: Finished difference Result 529085 states and 2729005 transitions. [2021-03-10 22:23:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:23:08,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:23:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:23:12,669 INFO L225 Difference]: With dead ends: 529085 [2021-03-10 22:23:12,670 INFO L226 Difference]: Without dead ends: 529085 [2021-03-10 22:23:12,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:23:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529085 states. [2021-03-10 22:23:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529085 to 374045. [2021-03-10 22:23:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374045 states, 374044 states have (on average 5.265073093005101) internal successors, (1969369), 374044 states have internal predecessors, (1969369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:23:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374045 states to 374045 states and 1969369 transitions. [2021-03-10 22:23:33,939 INFO L78 Accepts]: Start accepts. Automaton has 374045 states and 1969369 transitions. Word has length 42 [2021-03-10 22:23:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:23:33,939 INFO L480 AbstractCegarLoop]: Abstraction has 374045 states and 1969369 transitions. [2021-03-10 22:23:33,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:23:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 374045 states and 1969369 transitions. [2021-03-10 22:23:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:23:37,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:23:37,451 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:23:37,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:23:37,652 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:23:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:23:37,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2044211746, now seen corresponding path program 18 times [2021-03-10 22:23:37,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:23:37,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876333052] [2021-03-10 22:23:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:23:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:23:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:23:37,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876333052] [2021-03-10 22:23:37,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17785263] [2021-03-10 22:23:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:23:37,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:23:37,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:23:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:23:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:23:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:23:37,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:23:37,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:23:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051468458] [2021-03-10 22:23:37,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:23:37,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:23:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:23:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:23:37,945 INFO L87 Difference]: Start difference. First operand 374045 states and 1969369 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:23:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:23:53,746 INFO L93 Difference]: Finished difference Result 939310 states and 4794054 transitions. [2021-03-10 22:23:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:23:53,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:23:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:24:06,080 INFO L225 Difference]: With dead ends: 939310 [2021-03-10 22:24:06,080 INFO L226 Difference]: Without dead ends: 929821 [2021-03-10 22:24:06,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:24:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929821 states. [2021-03-10 22:24:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929821 to 657226. [2021-03-10 22:24:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657226 states, 657225 states have (on average 5.240001521548937) internal successors, (3443860), 657225 states have internal predecessors, (3443860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:24:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657226 states to 657226 states and 3443860 transitions. [2021-03-10 22:24:50,202 INFO L78 Accepts]: Start accepts. Automaton has 657226 states and 3443860 transitions. Word has length 45 [2021-03-10 22:24:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:24:50,202 INFO L480 AbstractCegarLoop]: Abstraction has 657226 states and 3443860 transitions. [2021-03-10 22:24:50,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:24:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 657226 states and 3443860 transitions. [2021-03-10 22:24:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:24:56,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:24:56,889 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:24:57,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:24:57,109 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:24:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:24:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1709886164, now seen corresponding path program 19 times [2021-03-10 22:24:57,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:24:57,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141367788] [2021-03-10 22:24:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:24:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:24:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:24:57,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141367788] [2021-03-10 22:24:57,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514156317] [2021-03-10 22:24:57,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:24:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:24:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:24:57,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:24:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:24:57,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:24:57,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:24:57,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487151379] [2021-03-10 22:24:57,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:24:57,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:24:57,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:24:57,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:24:57,364 INFO L87 Difference]: Start difference. First operand 657226 states and 3443860 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)