/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-Separate.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-dev-29289db [2021-06-05 14:55:14,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:55:14,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:55:14,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:55:14,897 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-Separate.epf [2021-06-05 14:55:14,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:55:14,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:55:14,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:55:14,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:55:14,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:55:14,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:55:14,920 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:55:14,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:55:14,921 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:55:14,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:55:14,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:55:14,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:55:14,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:55:14,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:55:14,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:55:14,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:55:14,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:55:14,923 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:55:14,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:55:15,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:55:15,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:55:15,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:55:15,153 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:55:15,154 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:55:15,155 INFO L432 ainManager$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 [2021-06-05 14:55:15,155 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-06-05 14:55:15,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:55:15,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:55:15,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:55:15,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:55:15,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:55:15,202 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,207 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:55:15,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:55:15,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:55:15,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:55:15,218 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,218 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,219 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,219 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,221 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,223 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,224 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 05.06 02:55:15" (1/1) ... [2021-06-05 14:55:15,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:55:15,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:55:15,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:55:15,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:55:15,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:55:15" (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 [2021-06-05 14:55:15,301 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:55:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:55:15,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:55:15,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:55:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:55:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:55:15,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:55:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:55:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:55:15,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:55:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:55:15,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:55:15,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 14:55:15,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 14:55:15,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 14:55:15,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 14:55:15,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 14:55:15,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 14:55:15,303 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:55:15,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:55:15,430 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:55:15,431 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:55:15 BoogieIcfgContainer [2021-06-05 14:55:15,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:55:15,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:55:15,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:55:15,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:55:15,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:55:15" (1/2) ... [2021-06-05 14:55:15,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c9ee68 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:55:15, skipping insertion in model container [2021-06-05 14:55:15,436 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 05.06 02:55:15" (2/2) ... [2021-06-05 14:55:15,437 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-06-05 14:55:15,440 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:55:15,441 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:55:15,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:55:15,441 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:55:15,528 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-05 14:55:15,542 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 14:55:15,554 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:55:15,555 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:55:15,555 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:55:15,555 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:55:15,555 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:55:15,555 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:55:15,555 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:55:15,555 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:55:15,562 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-06-05 14:55:15,930 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) [2021-06-05 14:55:15,965 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) [2021-06-05 14:55:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:55:16,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:16,013 INFO L521 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] [2021-06-05 14:55:16,014 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:16,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-06-05 14:55:16,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:16,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044017176] [2021-06-05 14:55:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:16,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:16,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044017176] [2021-06-05 14:55:16,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044017176] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:16,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:16,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:55:16,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014277052] [2021-06-05 14:55:16,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:55:16,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:55:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:16,208 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) [2021-06-05 14:55:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:16,557 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-06-05 14:55:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:55:16,558 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 [2021-06-05 14:55:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:16,791 INFO L225 Difference]: With dead ends: 23171 [2021-06-05 14:55:16,791 INFO L226 Difference]: Without dead ends: 15763 [2021-06-05 14:55:16,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-06-05 14:55:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-06-05 14:55:17,320 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) [2021-06-05 14:55:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-06-05 14:55:17,411 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-06-05 14:55:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:17,411 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-06-05 14:55:17,412 INFO L483 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) [2021-06-05 14:55:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-06-05 14:55:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:55:17,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:17,433 INFO L521 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] [2021-06-05 14:55:17,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:55:17,434 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-06-05 14:55:17,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:17,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237182897] [2021-06-05 14:55:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:17,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:17,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237182897] [2021-06-05 14:55:17,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237182897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:17,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:17,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:17,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173693251] [2021-06-05 14:55:17,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:17,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:17,467 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) [2021-06-05 14:55:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:17,611 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-06-05 14:55:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:17,611 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 [2021-06-05 14:55:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:17,641 INFO L225 Difference]: With dead ends: 9446 [2021-06-05 14:55:17,641 INFO L226 Difference]: Without dead ends: 6583 [2021-06-05 14:55:17,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-06-05 14:55:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-06-05 14:55:17,853 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) [2021-06-05 14:55:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-06-05 14:55:17,878 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-06-05 14:55:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:17,879 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-06-05 14:55:17,879 INFO L483 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) [2021-06-05 14:55:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-06-05 14:55:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:55:17,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:17,897 INFO L521 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] [2021-06-05 14:55:17,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:55:17,897 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-06-05 14:55:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:17,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745563213] [2021-06-05 14:55:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:17,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745563213] [2021-06-05 14:55:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745563213] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:17,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:17,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:55:17,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979905565] [2021-06-05 14:55:17,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:55:17,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:55:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:17,936 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) [2021-06-05 14:55:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:18,332 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-06-05 14:55:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:55:18,332 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 [2021-06-05 14:55:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:18,445 INFO L225 Difference]: With dead ends: 22801 [2021-06-05 14:55:18,445 INFO L226 Difference]: Without dead ends: 16593 [2021-06-05 14:55:18,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-06-05 14:55:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-06-05 14:55:18,781 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) [2021-06-05 14:55:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-06-05 14:55:18,804 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-06-05 14:55:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:18,805 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-06-05 14:55:18,805 INFO L483 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) [2021-06-05 14:55:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-06-05 14:55:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:55:18,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:18,827 INFO L521 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] [2021-06-05 14:55:18,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:55:18,827 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-06-05 14:55:18,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:18,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974806358] [2021-06-05 14:55:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:18,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:18,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974806358] [2021-06-05 14:55:18,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974806358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:18,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:18,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:18,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199209204] [2021-06-05 14:55:18,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:18,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:18,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:18,860 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) [2021-06-05 14:55:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:19,014 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-06-05 14:55:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:19,015 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 [2021-06-05 14:55:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:19,065 INFO L225 Difference]: With dead ends: 8424 [2021-06-05 14:55:19,065 INFO L226 Difference]: Without dead ends: 6361 [2021-06-05 14:55:19,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-05 14:55:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-06-05 14:55:19,200 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) [2021-06-05 14:55:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-06-05 14:55:19,292 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-06-05 14:55:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:19,293 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-06-05 14:55:19,293 INFO L483 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) [2021-06-05 14:55:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-06-05 14:55:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:19,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:19,310 INFO L521 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] [2021-06-05 14:55:19,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:55:19,310 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-06-05 14:55:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:19,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175880765] [2021-06-05 14:55:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:19,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:19,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175880765] [2021-06-05 14:55:19,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175880765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:19,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180147043] [2021-06-05 14:55:19,463 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 [2021-06-05 14:55:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:55:19,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:19,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180147043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:19,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:19,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 14:55:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402716891] [2021-06-05 14:55:19,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:55:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:55:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:55:19,743 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) [2021-06-05 14:55:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:19,879 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-06-05 14:55:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:55:19,880 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 [2021-06-05 14:55:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:19,933 INFO L225 Difference]: With dead ends: 13742 [2021-06-05 14:55:19,933 INFO L226 Difference]: Without dead ends: 13742 [2021-06-05 14:55:19,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:55:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-05 14:55:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-06-05 14:55:20,225 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) [2021-06-05 14:55:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-06-05 14:55:20,254 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-06-05 14:55:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:20,254 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-06-05 14:55:20,254 INFO L483 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) [2021-06-05 14:55:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-06-05 14:55:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:20,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:20,273 INFO L521 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] [2021-06-05 14:55:20,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:20,489 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:20,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-06-05 14:55:20,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:20,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548919245] [2021-06-05 14:55:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:20,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:20,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548919245] [2021-06-05 14:55:20,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548919245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:20,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753863380] [2021-06-05 14:55:20,579 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 [2021-06-05 14:55:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:20,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:55:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753863380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:20,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:55:20,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 14:55:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283914251] [2021-06-05 14:55:20,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:20,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:20,750 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) [2021-06-05 14:55:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:20,871 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-06-05 14:55:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:20,872 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 [2021-06-05 14:55:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:20,990 INFO L225 Difference]: With dead ends: 11412 [2021-06-05 14:55:20,991 INFO L226 Difference]: Without dead ends: 11118 [2021-06-05 14:55:20,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-06-05 14:55:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-06-05 14:55:21,208 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) [2021-06-05 14:55:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-06-05 14:55:21,234 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-06-05 14:55:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:21,234 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-06-05 14:55:21,234 INFO L483 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) [2021-06-05 14:55:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-06-05 14:55:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:21,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:21,252 INFO L521 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] [2021-06-05 14:55:21,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:21,468 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-06-05 14:55:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:21,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179032440] [2021-06-05 14:55:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:21,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:21,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179032440] [2021-06-05 14:55:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179032440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:21,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:21,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:21,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788685763] [2021-06-05 14:55:21,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:21,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:21,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:21,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:21,503 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) [2021-06-05 14:55:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:21,613 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-06-05 14:55:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:21,614 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 [2021-06-05 14:55:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:21,664 INFO L225 Difference]: With dead ends: 15516 [2021-06-05 14:55:21,669 INFO L226 Difference]: Without dead ends: 15386 [2021-06-05 14:55:21,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-06-05 14:55:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-06-05 14:55:22,117 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) [2021-06-05 14:55:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-06-05 14:55:22,159 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-06-05 14:55:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:22,159 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-06-05 14:55:22,159 INFO L483 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) [2021-06-05 14:55:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-06-05 14:55:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:22,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:22,188 INFO L521 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] [2021-06-05 14:55:22,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:55:22,188 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-06-05 14:55:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:22,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233841583] [2021-06-05 14:55:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:22,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233841583] [2021-06-05 14:55:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233841583] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:22,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:22,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:22,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045286869] [2021-06-05 14:55:22,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:22,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:22,209 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) [2021-06-05 14:55:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:22,353 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-06-05 14:55:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:22,354 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 [2021-06-05 14:55:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:22,421 INFO L225 Difference]: With dead ends: 22857 [2021-06-05 14:55:22,421 INFO L226 Difference]: Without dead ends: 22667 [2021-06-05 14:55:22,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-06-05 14:55:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-06-05 14:55:22,988 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) [2021-06-05 14:55:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-06-05 14:55:23,044 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-06-05 14:55:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:23,044 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-06-05 14:55:23,044 INFO L483 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) [2021-06-05 14:55:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-06-05 14:55:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:23,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:23,080 INFO L521 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] [2021-06-05 14:55:23,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:55:23,080 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-06-05 14:55:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:23,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34242830] [2021-06-05 14:55:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:23,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:23,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34242830] [2021-06-05 14:55:23,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34242830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:23,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025083983] [2021-06-05 14:55:23,130 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 [2021-06-05 14:55:23,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:23,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:23,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:55:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:23,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025083983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:23,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:23,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 14:55:23,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85498626] [2021-06-05 14:55:23,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:55:23,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:55:23,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:23,248 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) [2021-06-05 14:55:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:24,424 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-06-05 14:55:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:55:24,424 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 [2021-06-05 14:55:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:24,606 INFO L225 Difference]: With dead ends: 64631 [2021-06-05 14:55:24,607 INFO L226 Difference]: Without dead ends: 50671 [2021-06-05 14:55:24,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:55:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-06-05 14:55:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-06-05 14:55:25,584 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) [2021-06-05 14:55:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-06-05 14:55:25,659 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-06-05 14:55:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:25,659 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-06-05 14:55:25,659 INFO L483 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) [2021-06-05 14:55:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-06-05 14:55:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:25,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:25,706 INFO L521 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] [2021-06-05 14:55:25,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:25,919 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-06-05 14:55:25,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:25,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539381202] [2021-06-05 14:55:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539381202] [2021-06-05 14:55:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539381202] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:25,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:25,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:25,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760597033] [2021-06-05 14:55:25,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:25,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:25,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:25,958 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) [2021-06-05 14:55:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:26,381 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-06-05 14:55:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:26,382 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 [2021-06-05 14:55:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:26,462 INFO L225 Difference]: With dead ends: 27166 [2021-06-05 14:55:26,463 INFO L226 Difference]: Without dead ends: 26834 [2021-06-05 14:55:26,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-06-05 14:55:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-06-05 14:55:26,912 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) [2021-06-05 14:55:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-06-05 14:55:27,201 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-06-05 14:55:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:27,201 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-06-05 14:55:27,202 INFO L483 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) [2021-06-05 14:55:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-06-05 14:55:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:27,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:27,249 INFO L521 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] [2021-06-05 14:55:27,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:55:27,250 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1747092604, now seen corresponding path program 2 times [2021-06-05 14:55:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:27,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352860266] [2021-06-05 14:55:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:27,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:27,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352860266] [2021-06-05 14:55:27,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352860266] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:27,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:27,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126297401] [2021-06-05 14:55:27,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:27,272 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) [2021-06-05 14:55:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:27,409 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-06-05 14:55:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:55:27,410 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 [2021-06-05 14:55:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:27,477 INFO L225 Difference]: With dead ends: 24325 [2021-06-05 14:55:27,477 INFO L226 Difference]: Without dead ends: 24325 [2021-06-05 14:55:27,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-06-05 14:55:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-06-05 14:55:28,070 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) [2021-06-05 14:55:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-06-05 14:55:28,147 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-06-05 14:55:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:28,148 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-06-05 14:55:28,148 INFO L483 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) [2021-06-05 14:55:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-06-05 14:55:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:28,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:28,190 INFO L521 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] [2021-06-05 14:55:28,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 14:55:28,190 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:28,191 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-06-05 14:55:28,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:28,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150534228] [2021-06-05 14:55:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:28,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:28,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150534228] [2021-06-05 14:55:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150534228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:28,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880178877] [2021-06-05 14:55:28,242 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 [2021-06-05 14:55:28,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:55:28,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:28,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:55:28,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:28,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880178877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:28,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:28,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 14:55:28,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892206706] [2021-06-05 14:55:28,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:55:28,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:28,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:55:28,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:28,369 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) [2021-06-05 14:55:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:29,739 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-06-05 14:55:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:55:29,739 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 [2021-06-05 14:55:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:29,856 INFO L225 Difference]: With dead ends: 67384 [2021-06-05 14:55:29,857 INFO L226 Difference]: Without dead ends: 35063 [2021-06-05 14:55:29,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:55:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-06-05 14:55:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-06-05 14:55:30,345 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) [2021-06-05 14:55:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-06-05 14:55:30,409 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-06-05 14:55:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:30,409 INFO L482 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-06-05 14:55:30,409 INFO L483 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) [2021-06-05 14:55:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-06-05 14:55:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:30,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:30,448 INFO L521 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] [2021-06-05 14:55:30,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:30,657 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-06-05 14:55:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:30,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129485167] [2021-06-05 14:55:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:30,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:30,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129485167] [2021-06-05 14:55:30,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129485167] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:30,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:30,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:55:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796555697] [2021-06-05 14:55:30,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:55:30,678 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) [2021-06-05 14:55:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:31,030 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-06-05 14:55:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:31,031 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 [2021-06-05 14:55:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:31,087 INFO L225 Difference]: With dead ends: 20461 [2021-06-05 14:55:31,087 INFO L226 Difference]: Without dead ends: 19957 [2021-06-05 14:55:31,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-06-05 14:55:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-06-05 14:55:31,413 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) [2021-06-05 14:55:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-06-05 14:55:31,471 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-06-05 14:55:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:31,471 INFO L482 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-06-05 14:55:31,471 INFO L483 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) [2021-06-05 14:55:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-06-05 14:55:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:31,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:31,507 INFO L521 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] [2021-06-05 14:55:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 14:55:31,507 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-06-05 14:55:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361855756] [2021-06-05 14:55:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:31,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361855756] [2021-06-05 14:55:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361855756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:31,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:55:31,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:55:31,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813461161] [2021-06-05 14:55:31,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:55:31,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:55:31,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:55:31,541 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) [2021-06-05 14:55:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:31,704 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-06-05 14:55:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:55:31,704 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 [2021-06-05 14:55:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:31,759 INFO L225 Difference]: With dead ends: 21232 [2021-06-05 14:55:31,759 INFO L226 Difference]: Without dead ends: 20403 [2021-06-05 14:55:31,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:55:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-06-05 14:55:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-06-05 14:55:32,253 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) [2021-06-05 14:55:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-06-05 14:55:32,311 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-06-05 14:55:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:32,311 INFO L482 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-06-05 14:55:32,311 INFO L483 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) [2021-06-05 14:55:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-06-05 14:55:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:55:32,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:32,347 INFO L521 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] [2021-06-05 14:55:32,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 14:55:32,347 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-06-05 14:55:32,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:32,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821519313] [2021-06-05 14:55:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:32,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:32,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821519313] [2021-06-05 14:55:32,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821519313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120383227] [2021-06-05 14:55:32,392 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 [2021-06-05 14:55:32,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:55:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:55:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:32,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120383227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:55:32,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:55:32,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 14:55:32,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734130105] [2021-06-05 14:55:32,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:55:32,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:55:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:32,479 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) [2021-06-05 14:55:32,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:32,602 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-06-05 14:55:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:55:32,602 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 [2021-06-05 14:55:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:32,652 INFO L225 Difference]: With dead ends: 19318 [2021-06-05 14:55:32,653 INFO L226 Difference]: Without dead ends: 18640 [2021-06-05 14:55:32,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-06-05 14:55:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-06-05 14:55:33,098 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) [2021-06-05 14:55:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-06-05 14:55:33,144 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-06-05 14:55:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:33,144 INFO L482 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-06-05 14:55:33,144 INFO L483 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) [2021-06-05 14:55:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-06-05 14:55:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:55:33,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:33,170 INFO L521 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] [2021-06-05 14:55:33,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:55:33,371 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-06-05 14:55:33,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:33,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799981045] [2021-06-05 14:55:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:33,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799981045] [2021-06-05 14:55:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799981045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884872085] [2021-06-05 14:55:33,424 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 [2021-06-05 14:55:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:55:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:33,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884872085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:33,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:33,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-05 14:55:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401177107] [2021-06-05 14:55:33,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:55:33,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:55:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:33,509 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) [2021-06-05 14:55:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:34,269 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-06-05 14:55:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:55:34,270 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 [2021-06-05 14:55:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:34,348 INFO L225 Difference]: With dead ends: 43919 [2021-06-05 14:55:34,348 INFO L226 Difference]: Without dead ends: 24373 [2021-06-05 14:55:34,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:55:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-06-05 14:55:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-06-05 14:55:34,896 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) [2021-06-05 14:55:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-06-05 14:55:34,920 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-06-05 14:55:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:34,920 INFO L482 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-06-05 14:55:34,920 INFO L483 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) [2021-06-05 14:55:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-06-05 14:55:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:55:34,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:34,936 INFO L521 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] [2021-06-05 14:55:35,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:35,149 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-06-05 14:55:35,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:35,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576182595] [2021-06-05 14:55:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:35,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:35,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576182595] [2021-06-05 14:55:35,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576182595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:35,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972211754] [2021-06-05 14:55:35,226 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 [2021-06-05 14:55:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:35,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:55:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:35,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972211754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:35,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:35,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-05 14:55:35,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910487321] [2021-06-05 14:55:35,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:55:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:55:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:35,342 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) [2021-06-05 14:55:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:36,481 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-06-05 14:55:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 14:55:36,482 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 [2021-06-05 14:55:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:36,544 INFO L225 Difference]: With dead ends: 33369 [2021-06-05 14:55:36,544 INFO L226 Difference]: Without dead ends: 23102 [2021-06-05 14:55:36,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:55:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-06-05 14:55:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-06-05 14:55:37,048 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) [2021-06-05 14:55:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-06-05 14:55:37,078 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-06-05 14:55:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:37,078 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-06-05 14:55:37,078 INFO L483 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) [2021-06-05 14:55:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-06-05 14:55:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:55:37,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:37,096 INFO L521 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] [2021-06-05 14:55:37,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:55:37,314 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:37,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:37,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-06-05 14:55:37,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:37,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835521281] [2021-06-05 14:55:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:37,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:37,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835521281] [2021-06-05 14:55:37,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835521281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:37,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391329754] [2021-06-05 14:55:37,397 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 [2021-06-05 14:55:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:55:37,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:37,521 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 [2021-06-05 14:55:37,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:37,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-06-05 14:55:37,535 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 [2021-06-05 14:55:37,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:37,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 14:55:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:37,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391329754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:37,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:37,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 14:55:37,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440095295] [2021-06-05 14:55:37,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:55:37,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:55:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:37,560 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) [2021-06-05 14:55:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:37,922 INFO L93 Difference]: Finished difference Result 34805 states and 160319 transitions. [2021-06-05 14:55:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:55:37,922 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 [2021-06-05 14:55:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:37,993 INFO L225 Difference]: With dead ends: 34805 [2021-06-05 14:55:37,993 INFO L226 Difference]: Without dead ends: 24590 [2021-06-05 14:55:37,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24590 states. [2021-06-05 14:55:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24590 to 9804. [2021-06-05 14:55:38,433 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) [2021-06-05 14:55:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-06-05 14:55:38,477 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-06-05 14:55:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:38,477 INFO L482 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-06-05 14:55:38,477 INFO L483 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) [2021-06-05 14:55:38,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-06-05 14:55:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:55:38,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:38,494 INFO L521 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] [2021-06-05 14:55:38,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:55:38,695 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:38,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:38,695 INFO L82 PathProgramCache]: Analyzing trace with hash 95025711, now seen corresponding path program 2 times [2021-06-05 14:55:38,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:38,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926430437] [2021-06-05 14:55:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:38,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:38,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926430437] [2021-06-05 14:55:38,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926430437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:38,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907513283] [2021-06-05 14:55:38,872 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 [2021-06-05 14:55:38,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:38,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:55:38,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:38,986 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 [2021-06-05 14:55:38,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:38,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:38,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:38,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 14:55:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:39,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907513283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:39,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:39,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:55:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315048551] [2021-06-05 14:55:39,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:55:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:55:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:55:39,025 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) [2021-06-05 14:55:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:39,401 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-06-05 14:55:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:55:39,401 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 [2021-06-05 14:55:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:39,442 INFO L225 Difference]: With dead ends: 32096 [2021-06-05 14:55:39,443 INFO L226 Difference]: Without dead ends: 16159 [2021-06-05 14:55:39,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:55:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-06-05 14:55:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-06-05 14:55:39,643 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) [2021-06-05 14:55:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-06-05 14:55:39,671 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-06-05 14:55:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:39,672 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-06-05 14:55:39,672 INFO L483 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) [2021-06-05 14:55:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-06-05 14:55:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:55:39,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:39,689 INFO L521 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] [2021-06-05 14:55:39,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:39,890 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1049367287, now seen corresponding path program 3 times [2021-06-05 14:55:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:39,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75001145] [2021-06-05 14:55:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:39,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:39,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75001145] [2021-06-05 14:55:39,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75001145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:39,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203592324] [2021-06-05 14:55:39,971 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 [2021-06-05 14:55:40,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:55:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:40,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:55:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:40,084 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 [2021-06-05 14:55:40,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:40,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:40,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:40,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 14:55:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203592324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:55:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149588721] [2021-06-05 14:55:40,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:55:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:55:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:55:40,118 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) [2021-06-05 14:55:40,317 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 14:55:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:40,851 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-06-05 14:55:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:55:40,851 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 [2021-06-05 14:55:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:40,909 INFO L225 Difference]: With dead ends: 38248 [2021-06-05 14:55:40,909 INFO L226 Difference]: Without dead ends: 19645 [2021-06-05 14:55:40,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-06-05 14:55:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-06-05 14:55:41,195 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) [2021-06-05 14:55:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-06-05 14:55:41,230 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-06-05 14:55:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:41,231 INFO L482 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-06-05 14:55:41,231 INFO L483 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) [2021-06-05 14:55:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-06-05 14:55:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:55:41,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:41,250 INFO L521 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] [2021-06-05 14:55:41,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:41,451 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1500175273, now seen corresponding path program 4 times [2021-06-05 14:55:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:41,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574874445] [2021-06-05 14:55:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:41,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:41,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574874445] [2021-06-05 14:55:41,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574874445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:41,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315480534] [2021-06-05 14:55:41,587 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 [2021-06-05 14:55:41,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:41,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:55:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:41,673 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 [2021-06-05 14:55:41,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:41,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-05 14:55:41,695 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 [2021-06-05 14:55:41,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:41,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-06-05 14:55:41,740 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 [2021-06-05 14:55:41,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:41,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 14:55:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:41,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315480534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:41,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:41,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:55:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436155511] [2021-06-05 14:55:41,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:55:41,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:55:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:55:41,761 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) [2021-06-05 14:55:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:42,688 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-06-05 14:55:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:55:42,688 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 [2021-06-05 14:55:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:42,735 INFO L225 Difference]: With dead ends: 29883 [2021-06-05 14:55:42,735 INFO L226 Difference]: Without dead ends: 17348 [2021-06-05 14:55:42,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:55:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-06-05 14:55:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-06-05 14:55:42,950 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) [2021-06-05 14:55:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-06-05 14:55:42,981 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-06-05 14:55:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:42,981 INFO L482 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-06-05 14:55:42,981 INFO L483 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) [2021-06-05 14:55:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-06-05 14:55:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:55:43,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:43,000 INFO L521 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] [2021-06-05 14:55:43,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 14:55:43,201 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1584459695, now seen corresponding path program 5 times [2021-06-05 14:55:43,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:43,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852260339] [2021-06-05 14:55:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:43,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:43,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852260339] [2021-06-05 14:55:43,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852260339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:43,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721860016] [2021-06-05 14:55:43,317 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 [2021-06-05 14:55:43,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:55:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:55:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:43,398 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 [2021-06-05 14:55:43,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:43,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:43,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:43,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-05 14:55:43,437 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 [2021-06-05 14:55:43,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:43,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:43,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:43,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 14:55:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721860016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:43,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:43,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 14:55:43,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635325905] [2021-06-05 14:55:43,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:55:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:55:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:55:43,459 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) [2021-06-05 14:55:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:44,555 INFO L93 Difference]: Finished difference Result 37384 states and 169706 transitions. [2021-06-05 14:55:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:55:44,555 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 [2021-06-05 14:55:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:44,608 INFO L225 Difference]: With dead ends: 37384 [2021-06-05 14:55:44,609 INFO L226 Difference]: Without dead ends: 20919 [2021-06-05 14:55:44,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 700.0ms TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:55:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20919 states. [2021-06-05 14:55:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20919 to 11315. [2021-06-05 14:55:44,855 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) [2021-06-05 14:55:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-06-05 14:55:44,888 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-06-05 14:55:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:44,888 INFO L482 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-06-05 14:55:44,888 INFO L483 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) [2021-06-05 14:55:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-06-05 14:55:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 14:55:44,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:44,907 INFO L521 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] [2021-06-05 14:55:45,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:45,113 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1173646258, now seen corresponding path program 6 times [2021-06-05 14:55:45,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:45,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300235825] [2021-06-05 14:55:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:45,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:45,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300235825] [2021-06-05 14:55:45,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300235825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:45,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675012049] [2021-06-05 14:55:45,138 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 [2021-06-05 14:55:45,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:55:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:55:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:45,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675012049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:45,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:45,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 14:55:45,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446527883] [2021-06-05 14:55:45,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:55:45,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:55:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:45,237 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) [2021-06-05 14:55:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:45,902 INFO L93 Difference]: Finished difference Result 38369 states and 174934 transitions. [2021-06-05 14:55:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:55:45,902 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 [2021-06-05 14:55:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:46,021 INFO L225 Difference]: With dead ends: 38369 [2021-06-05 14:55:46,021 INFO L226 Difference]: Without dead ends: 38168 [2021-06-05 14:55:46,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:55:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38168 states. [2021-06-05 14:55:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38168 to 27191. [2021-06-05 14:55:46,632 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) [2021-06-05 14:55:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27191 states to 27191 states and 126076 transitions. [2021-06-05 14:55:46,726 INFO L78 Accepts]: Start accepts. Automaton has 27191 states and 126076 transitions. Word has length 42 [2021-06-05 14:55:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:46,726 INFO L482 AbstractCegarLoop]: Abstraction has 27191 states and 126076 transitions. [2021-06-05 14:55:46,726 INFO L483 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) [2021-06-05 14:55:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27191 states and 126076 transitions. [2021-06-05 14:55:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 14:55:46,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:46,786 INFO L521 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] [2021-06-05 14:55:46,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 14:55:46,986 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 22210040, now seen corresponding path program 7 times [2021-06-05 14:55:46,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:46,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087037602] [2021-06-05 14:55:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:47,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087037602] [2021-06-05 14:55:47,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087037602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841796363] [2021-06-05 14:55:47,015 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 [2021-06-05 14:55:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:55:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:47,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841796363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:47,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:47,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:55:47,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453356548] [2021-06-05 14:55:47,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:55:47,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:55:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:55:47,107 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) [2021-06-05 14:55:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:47,453 INFO L93 Difference]: Finished difference Result 51293 states and 237263 transitions. [2021-06-05 14:55:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:55:47,453 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 [2021-06-05 14:55:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:47,620 INFO L225 Difference]: With dead ends: 51293 [2021-06-05 14:55:47,620 INFO L226 Difference]: Without dead ends: 51193 [2021-06-05 14:55:47,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:55:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-06-05 14:55:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 32278. [2021-06-05 14:55:48,558 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) [2021-06-05 14:55:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 152515 transitions. [2021-06-05 14:55:48,672 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 152515 transitions. Word has length 42 [2021-06-05 14:55:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:48,673 INFO L482 AbstractCegarLoop]: Abstraction has 32278 states and 152515 transitions. [2021-06-05 14:55:48,673 INFO L483 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) [2021-06-05 14:55:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 152515 transitions. [2021-06-05 14:55:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 14:55:48,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:48,740 INFO L521 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] [2021-06-05 14:55:48,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:48,940 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2076260328, now seen corresponding path program 8 times [2021-06-05 14:55:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:48,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468286124] [2021-06-05 14:55:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468286124] [2021-06-05 14:55:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468286124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350997885] [2021-06-05 14:55:48,960 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 [2021-06-05 14:55:48,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:48,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:55:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:49,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350997885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:49,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:49,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:55:49,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673293048] [2021-06-05 14:55:49,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:55:49,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:55:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:55:49,040 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) [2021-06-05 14:55:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:49,329 INFO L93 Difference]: Finished difference Result 48003 states and 221808 transitions. [2021-06-05 14:55:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:55:49,329 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 [2021-06-05 14:55:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:49,479 INFO L225 Difference]: With dead ends: 48003 [2021-06-05 14:55:49,479 INFO L226 Difference]: Without dead ends: 48003 [2021-06-05 14:55:49,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:55:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48003 states. [2021-06-05 14:55:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48003 to 31277. [2021-06-05 14:55:50,301 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) [2021-06-05 14:55:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 147558 transitions. [2021-06-05 14:55:50,430 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 147558 transitions. Word has length 42 [2021-06-05 14:55:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:50,430 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 147558 transitions. [2021-06-05 14:55:50,430 INFO L483 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) [2021-06-05 14:55:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 147558 transitions. [2021-06-05 14:55:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 14:55:50,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:50,503 INFO L521 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] [2021-06-05 14:55:50,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 14:55:50,704 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash 31127056, now seen corresponding path program 9 times [2021-06-05 14:55:50,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:50,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290261633] [2021-06-05 14:55:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:50,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290261633] [2021-06-05 14:55:50,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290261633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970150345] [2021-06-05 14:55:50,734 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 [2021-06-05 14:55:50,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:55:50,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:55:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:50,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970150345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:50,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:50,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:55:50,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727345186] [2021-06-05 14:55:50,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:55:50,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:55:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:55:50,839 INFO L87 Difference]: Start difference. First operand 31277 states and 147558 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 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) [2021-06-05 14:55:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:51,266 INFO L93 Difference]: Finished difference Result 59008 states and 276119 transitions. [2021-06-05 14:55:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:55:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 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 [2021-06-05 14:55:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:51,465 INFO L225 Difference]: With dead ends: 59008 [2021-06-05 14:55:51,465 INFO L226 Difference]: Without dead ends: 59008 [2021-06-05 14:55:51,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:55:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59008 states. [2021-06-05 14:55:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59008 to 42789. [2021-06-05 14:55:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42789 states, 42788 states have (on average 4.78961391044218) internal successors, (204938), 42788 states have internal predecessors, (204938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42789 states to 42789 states and 204938 transitions. [2021-06-05 14:55:52,650 INFO L78 Accepts]: Start accepts. Automaton has 42789 states and 204938 transitions. Word has length 42 [2021-06-05 14:55:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:52,650 INFO L482 AbstractCegarLoop]: Abstraction has 42789 states and 204938 transitions. [2021-06-05 14:55:52,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 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) [2021-06-05 14:55:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 42789 states and 204938 transitions. [2021-06-05 14:55:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 14:55:52,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:52,733 INFO L521 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] [2021-06-05 14:55:52,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:52,941 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1944125966, now seen corresponding path program 10 times [2021-06-05 14:55:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:52,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337982577] [2021-06-05 14:55:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:52,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:52,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337982577] [2021-06-05 14:55:52,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337982577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:52,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772006581] [2021-06-05 14:55:52,964 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 [2021-06-05 14:55:53,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:55:53,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:53,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772006581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:53,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:53,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:55:53,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147384348] [2021-06-05 14:55:53,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:55:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:53,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:55:53,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:55:53,042 INFO L87 Difference]: Start difference. First operand 42789 states and 204938 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) [2021-06-05 14:55:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:53,367 INFO L93 Difference]: Finished difference Result 49547 states and 233319 transitions. [2021-06-05 14:55:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:55:53,367 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 [2021-06-05 14:55:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:53,540 INFO L225 Difference]: With dead ends: 49547 [2021-06-05 14:55:53,540 INFO L226 Difference]: Without dead ends: 49492 [2021-06-05 14:55:53,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:55:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49492 states. [2021-06-05 14:55:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49492 to 42675. [2021-06-05 14:55:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42675 states, 42674 states have (on average 4.792590336035993) internal successors, (204519), 42674 states have internal predecessors, (204519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42675 states to 42675 states and 204519 transitions. [2021-06-05 14:55:54,703 INFO L78 Accepts]: Start accepts. Automaton has 42675 states and 204519 transitions. Word has length 42 [2021-06-05 14:55:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:54,703 INFO L482 AbstractCegarLoop]: Abstraction has 42675 states and 204519 transitions. [2021-06-05 14:55:54,703 INFO L483 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) [2021-06-05 14:55:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42675 states and 204519 transitions. [2021-06-05 14:55:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 14:55:54,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:54,797 INFO L521 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] [2021-06-05 14:55:54,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 14:55:54,998 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash -484411891, now seen corresponding path program 11 times [2021-06-05 14:55:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:54,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060233600] [2021-06-05 14:55:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:55:55,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:55,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060233600] [2021-06-05 14:55:55,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060233600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:55,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452777121] [2021-06-05 14:55:55,034 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 [2021-06-05 14:55:55,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:55:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:55:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:55:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452777121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:55,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:55,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 14:55:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411216490] [2021-06-05 14:55:55,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:55:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:55:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:55:55,142 INFO L87 Difference]: Start difference. First operand 42675 states and 204519 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:55,966 INFO L93 Difference]: Finished difference Result 86712 states and 419227 transitions. [2021-06-05 14:55:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:55:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 14:55:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:56,290 INFO L225 Difference]: With dead ends: 86712 [2021-06-05 14:55:56,290 INFO L226 Difference]: Without dead ends: 85513 [2021-06-05 14:55:56,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:55:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85513 states. [2021-06-05 14:55:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85513 to 68374. [2021-06-05 14:55:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68374 states, 68373 states have (on average 4.912158308104076) internal successors, (335859), 68373 states have internal predecessors, (335859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68374 states to 68374 states and 335859 transitions. [2021-06-05 14:55:58,213 INFO L78 Accepts]: Start accepts. Automaton has 68374 states and 335859 transitions. Word has length 42 [2021-06-05 14:55:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:58,213 INFO L482 AbstractCegarLoop]: Abstraction has 68374 states and 335859 transitions. [2021-06-05 14:55:58,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 68374 states and 335859 transitions. [2021-06-05 14:55:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 14:55:58,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:58,393 INFO L521 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] [2021-06-05 14:55:58,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:55:58,594 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:55:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2044211746, now seen corresponding path program 12 times [2021-06-05 14:55:58,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:58,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674669883] [2021-06-05 14:55:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:55:58,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:58,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674669883] [2021-06-05 14:55:58,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674669883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:58,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016228044] [2021-06-05 14:55:58,625 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 [2021-06-05 14:55:58,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:55:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:55:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:55:58,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016228044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:58,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:58,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 14:55:58,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475743939] [2021-06-05 14:55:58,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:55:58,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:55:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:55:58,732 INFO L87 Difference]: Start difference. First operand 68374 states and 335859 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) [2021-06-05 14:56:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:00,642 INFO L93 Difference]: Finished difference Result 206654 states and 1010518 transitions. [2021-06-05 14:56:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:56:00,642 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 [2021-06-05 14:56:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:01,512 INFO L225 Difference]: With dead ends: 206654 [2021-06-05 14:56:01,512 INFO L226 Difference]: Without dead ends: 206654 [2021-06-05 14:56:01,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:56:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206654 states. [2021-06-05 14:56:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206654 to 149917. [2021-06-05 14:56:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149917 states, 149916 states have (on average 5.023439792950719) internal successors, (753094), 149916 states have internal predecessors, (753094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149917 states to 149917 states and 753094 transitions. [2021-06-05 14:56:07,916 INFO L78 Accepts]: Start accepts. Automaton has 149917 states and 753094 transitions. Word has length 45 [2021-06-05 14:56:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:07,916 INFO L482 AbstractCegarLoop]: Abstraction has 149917 states and 753094 transitions. [2021-06-05 14:56:07,916 INFO L483 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) [2021-06-05 14:56:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 149917 states and 753094 transitions. [2021-06-05 14:56:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 14:56:08,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:08,922 INFO L521 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] [2021-06-05 14:56:09,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:56:09,137 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:56:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1709886164, now seen corresponding path program 13 times [2021-06-05 14:56:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:09,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142581431] [2021-06-05 14:56:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:56:09,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:09,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142581431] [2021-06-05 14:56:09,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142581431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:09,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697381092] [2021-06-05 14:56:09,164 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 [2021-06-05 14:56:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:09,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:56:09,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:09,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697381092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:09,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:09,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 14:56:09,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376238919] [2021-06-05 14:56:09,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:56:09,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:56:09,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:56:09,282 INFO L87 Difference]: Start difference. First operand 149917 states and 753094 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) [2021-06-05 14:56:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:15,775 INFO L93 Difference]: Finished difference Result 623344 states and 3160632 transitions. [2021-06-05 14:56:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:56:15,776 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 45 [2021-06-05 14:56:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:19,431 INFO L225 Difference]: With dead ends: 623344 [2021-06-05 14:56:19,431 INFO L226 Difference]: Without dead ends: 606012 [2021-06-05 14:56:19,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:56:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606012 states. [2021-06-05 14:56:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606012 to 382514. [2021-06-05 14:56:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382514 states, 382513 states have (on average 5.261230337269583) internal successors, (2012489), 382513 states have internal predecessors, (2012489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382514 states to 382514 states and 2012489 transitions. [2021-06-05 14:56:38,465 INFO L78 Accepts]: Start accepts. Automaton has 382514 states and 2012489 transitions. Word has length 45 [2021-06-05 14:56:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:38,465 INFO L482 AbstractCegarLoop]: Abstraction has 382514 states and 2012489 transitions. [2021-06-05 14:56:38,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-06-05 14:56:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 382514 states and 2012489 transitions. [2021-06-05 14:56:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 14:56:41,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:41,055 INFO L521 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] [2021-06-05 14:56:41,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:41,269 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:56:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1403620225, now seen corresponding path program 14 times [2021-06-05 14:56:41,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:41,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153883760] [2021-06-05 14:56:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:56:41,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153883760] [2021-06-05 14:56:41,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153883760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681619002] [2021-06-05 14:56:41,290 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 [2021-06-05 14:56:41,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:41,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:41,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:56:41,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:56:41,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681619002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:41,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:41,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:56:41,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962579959] [2021-06-05 14:56:41,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:56:41,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:56:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:56:41,437 INFO L87 Difference]: Start difference. First operand 382514 states and 2012489 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 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)