/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:27:20,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:27:20,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:27:20,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 20:27:20,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 20:27:20,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 20:27:20,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 20:27:20,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 20:27:20,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 20:27:20,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 20:27:20,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 20:27:20,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 20:27:20,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 20:27:20,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 20:27:20,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 20:27:20,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 20:27:20,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 20:27:20,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 20:27:20,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 20:27:20,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 20:27:20,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 20:27:20,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 20:27:20,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 20:27:20,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 20:27:20,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 20:27:20,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 20:27:20,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 20:27:20,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 20:27:20,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 20:27:20,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-12 20:27:20,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 20:27:20,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 20:27:20,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 20:27:20,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 20:27:20,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 20:27:20,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 20:27:20,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 20:27:20,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 20:27:20,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:27:20,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:27:20,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:27:20,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:27:20,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:27:20,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:27:20,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:27:20,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:27:20,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:27:20,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:27:20,545 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:27:20,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:27:20,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:27:20,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:27:20,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:27:20,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:27:20,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:27:20,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:27:20,548 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:27:20,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:27:20,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:27:20,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:27:20,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:27:20,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:27:20,795 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:27:20,797 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:27:20,797 INFO L432 ainManager$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 [2021-06-12 20:27:20,797 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-06-12 20:27:20,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:27:20,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:27:20,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:27:20,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:27:20,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:27:20,835 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,840 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:27:20,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:27:20,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:27:20,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:27:20,853 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,853 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,862 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,863 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,869 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,872 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,874 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 12.06 08:27:20" (1/1) ... [2021-06-12 20:27:20,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:27:20,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:27:20,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:27:20,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:27:20,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:27:20" (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 [2021-06-12 20:27:20,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:27:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:27:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:27:20,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:27:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:27:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:27:20,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:27:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:27:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:27:20,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:27:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:27:20,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:27:20,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:27:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:27:20,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:27:20,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-12 20:27:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-12 20:27:20,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-12 20:27:20,944 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:27:21,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:27:21,137 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:27:21,139 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:27:21 BoogieIcfgContainer [2021-06-12 20:27:21,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:27:21,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:27:21,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:27:21,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:27:21,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:27:20" (1/2) ... [2021-06-12 20:27:21,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a76b7e and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:27:21, skipping insertion in model container [2021-06-12 20:27:21,143 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 12.06 08:27:21" (2/2) ... [2021-06-12 20:27:21,144 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-06-12 20:27:21,148 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:27:21,148 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:27:21,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:27:21,149 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:27:21,215 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-12 20:27:21,230 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-12 20:27:21,250 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:27:21,250 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:27:21,251 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:27:21,251 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:27:21,251 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:27:21,251 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:27:21,251 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:27:21,251 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:27:21,258 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-06-12 20:27:21,635 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) [2021-06-12 20:27:21,653 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) [2021-06-12 20:27:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:27:21,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:21,697 INFO L472 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] [2021-06-12 20:27:21,698 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:21,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-06-12 20:27:21,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:21,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018525544] [2021-06-12 20:27:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:21,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:21,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018525544] [2021-06-12 20:27:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018525544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:21,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:21,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:27:21,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056763896] [2021-06-12 20:27:21,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:27:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:27:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:21,919 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) [2021-06-12 20:27:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:22,322 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-06-12 20:27:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:27:22,324 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 [2021-06-12 20:27:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:22,514 INFO L225 Difference]: With dead ends: 23171 [2021-06-12 20:27:22,514 INFO L226 Difference]: Without dead ends: 15763 [2021-06-12 20:27:22,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-06-12 20:27:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-06-12 20:27:22,912 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) [2021-06-12 20:27:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-06-12 20:27:23,035 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-06-12 20:27:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:23,036 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-06-12 20:27:23,036 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) [2021-06-12 20:27:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-06-12 20:27:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:27:23,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:23,060 INFO L472 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] [2021-06-12 20:27:23,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:27:23,060 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:23,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-06-12 20:27:23,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:23,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842775315] [2021-06-12 20:27:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:23,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:23,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842775315] [2021-06-12 20:27:23,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842775315] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:23,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:23,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:23,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717475228] [2021-06-12 20:27:23,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:23,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:23,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:23,106 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) [2021-06-12 20:27:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:23,223 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-06-12 20:27:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:23,224 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 [2021-06-12 20:27:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:23,260 INFO L225 Difference]: With dead ends: 9446 [2021-06-12 20:27:23,260 INFO L226 Difference]: Without dead ends: 6583 [2021-06-12 20:27:23,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-06-12 20:27:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-06-12 20:27:23,475 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) [2021-06-12 20:27:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-06-12 20:27:23,505 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-06-12 20:27:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:23,506 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-06-12 20:27:23,506 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) [2021-06-12 20:27:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-06-12 20:27:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:27:23,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:23,523 INFO L472 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] [2021-06-12 20:27:23,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:27:23,523 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-06-12 20:27:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:23,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171027904] [2021-06-12 20:27:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:23,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:23,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171027904] [2021-06-12 20:27:23,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171027904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:23,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:23,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:27:23,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028800872] [2021-06-12 20:27:23,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:27:23,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:27:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:23,559 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) [2021-06-12 20:27:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:23,935 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-06-12 20:27:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:27:23,935 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 [2021-06-12 20:27:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:24,045 INFO L225 Difference]: With dead ends: 22801 [2021-06-12 20:27:24,045 INFO L226 Difference]: Without dead ends: 16593 [2021-06-12 20:27:24,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-06-12 20:27:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-06-12 20:27:24,347 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) [2021-06-12 20:27:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-06-12 20:27:24,469 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-06-12 20:27:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:24,469 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-06-12 20:27:24,470 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) [2021-06-12 20:27:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-06-12 20:27:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:27:24,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:24,509 INFO L472 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] [2021-06-12 20:27:24,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:27:24,509 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-06-12 20:27:24,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:24,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758089982] [2021-06-12 20:27:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:24,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:24,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758089982] [2021-06-12 20:27:24,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758089982] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:24,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:24,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371812747] [2021-06-12 20:27:24,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:24,530 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) [2021-06-12 20:27:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:24,580 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-06-12 20:27:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:24,580 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 [2021-06-12 20:27:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:24,600 INFO L225 Difference]: With dead ends: 8424 [2021-06-12 20:27:24,600 INFO L226 Difference]: Without dead ends: 6361 [2021-06-12 20:27:24,600 INFO L728 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 [2021-06-12 20:27:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-12 20:27:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-06-12 20:27:24,727 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) [2021-06-12 20:27:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-06-12 20:27:24,751 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-06-12 20:27:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:24,752 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-06-12 20:27:24,752 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) [2021-06-12 20:27:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-06-12 20:27:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:24,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:24,775 INFO L472 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] [2021-06-12 20:27:24,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:27:24,775 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-06-12 20:27:24,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:24,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497397860] [2021-06-12 20:27:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:24,938 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2021-06-12 20:27:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:24,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:24,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497397860] [2021-06-12 20:27:24,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497397860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:24,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566566219] [2021-06-12 20:27:24,968 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 [2021-06-12 20:27:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:27:25,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:25,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566566219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:25,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:25,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 20:27:25,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130835449] [2021-06-12 20:27:25,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:27:25,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:27:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:27:25,237 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) [2021-06-12 20:27:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:25,368 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-06-12 20:27:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:27:25,368 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 [2021-06-12 20:27:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:25,420 INFO L225 Difference]: With dead ends: 13742 [2021-06-12 20:27:25,420 INFO L226 Difference]: Without dead ends: 13742 [2021-06-12 20:27:25,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:27:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-12 20:27:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-06-12 20:27:25,691 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) [2021-06-12 20:27:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-06-12 20:27:25,715 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-06-12 20:27:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:25,715 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-06-12 20:27:25,716 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) [2021-06-12 20:27:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-06-12 20:27:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:25,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:25,733 INFO L472 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] [2021-06-12 20:27:25,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:25,938 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-06-12 20:27:25,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:25,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867320634] [2021-06-12 20:27:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:25,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867320634] [2021-06-12 20:27:25,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867320634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478815342] [2021-06-12 20:27:25,992 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 [2021-06-12 20:27:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:27:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:26,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478815342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:26,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:27:26,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-12 20:27:26,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73911007] [2021-06-12 20:27:26,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:26,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:26,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:26,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:26,216 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) [2021-06-12 20:27:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:26,319 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-06-12 20:27:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:26,320 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 [2021-06-12 20:27:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:26,353 INFO L225 Difference]: With dead ends: 11412 [2021-06-12 20:27:26,353 INFO L226 Difference]: Without dead ends: 11118 [2021-06-12 20:27:26,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:27:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-06-12 20:27:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-06-12 20:27:26,665 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) [2021-06-12 20:27:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-06-12 20:27:26,698 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-06-12 20:27:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:26,698 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-06-12 20:27:26,698 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) [2021-06-12 20:27:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-06-12 20:27:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:26,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:26,718 INFO L472 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] [2021-06-12 20:27:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:26,933 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-06-12 20:27:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450868734] [2021-06-12 20:27:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:26,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:26,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450868734] [2021-06-12 20:27:26,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450868734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:26,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:26,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989382158] [2021-06-12 20:27:26,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:26,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:26,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:26,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:26,964 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) [2021-06-12 20:27:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:27,092 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-06-12 20:27:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:27,093 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 [2021-06-12 20:27:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:27,140 INFO L225 Difference]: With dead ends: 15516 [2021-06-12 20:27:27,140 INFO L226 Difference]: Without dead ends: 15386 [2021-06-12 20:27:27,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-06-12 20:27:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-06-12 20:27:27,462 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) [2021-06-12 20:27:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-06-12 20:27:27,594 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-06-12 20:27:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:27,594 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-06-12 20:27:27,594 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) [2021-06-12 20:27:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-06-12 20:27:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:27,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:27,640 INFO L472 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] [2021-06-12 20:27:27,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:27:27,642 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-06-12 20:27:27,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:27,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563967873] [2021-06-12 20:27:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:27,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:27,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563967873] [2021-06-12 20:27:27,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563967873] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:27,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:27,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:27,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203110488] [2021-06-12 20:27:27,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:27,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:27,661 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) [2021-06-12 20:27:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:27,803 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-06-12 20:27:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:27,803 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 [2021-06-12 20:27:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:27,861 INFO L225 Difference]: With dead ends: 22857 [2021-06-12 20:27:27,861 INFO L226 Difference]: Without dead ends: 22667 [2021-06-12 20:27:27,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-06-12 20:27:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-06-12 20:27:28,400 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) [2021-06-12 20:27:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-06-12 20:27:28,468 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-06-12 20:27:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:28,468 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-06-12 20:27:28,469 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) [2021-06-12 20:27:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-06-12 20:27:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:28,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:28,504 INFO L472 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] [2021-06-12 20:27:28,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:27:28,504 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-06-12 20:27:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889038771] [2021-06-12 20:27:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:28,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:28,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889038771] [2021-06-12 20:27:28,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889038771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:28,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379019719] [2021-06-12 20:27:28,576 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 [2021-06-12 20:27:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:27:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:27:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:28,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379019719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:28,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:28,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-12 20:27:28,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193670265] [2021-06-12 20:27:28,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:27:28,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:28,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:27:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:28,683 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) [2021-06-12 20:27:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:29,852 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-06-12 20:27:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:27:29,853 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 [2021-06-12 20:27:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:30,014 INFO L225 Difference]: With dead ends: 64631 [2021-06-12 20:27:30,014 INFO L226 Difference]: Without dead ends: 50671 [2021-06-12 20:27:30,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:27:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-06-12 20:27:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-06-12 20:27:30,848 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) [2021-06-12 20:27:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-06-12 20:27:30,929 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-06-12 20:27:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:30,929 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-06-12 20:27:30,929 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) [2021-06-12 20:27:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-06-12 20:27:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:30,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:30,975 INFO L472 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] [2021-06-12 20:27:31,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:31,187 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-06-12 20:27:31,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:31,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111498276] [2021-06-12 20:27:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:31,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:31,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111498276] [2021-06-12 20:27:31,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111498276] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:31,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:31,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475386876] [2021-06-12 20:27:31,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:31,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:31,206 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) [2021-06-12 20:27:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:31,561 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-06-12 20:27:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:31,562 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 [2021-06-12 20:27:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:31,663 INFO L225 Difference]: With dead ends: 27166 [2021-06-12 20:27:31,663 INFO L226 Difference]: Without dead ends: 26834 [2021-06-12 20:27:31,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-06-12 20:27:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-06-12 20:27:32,166 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) [2021-06-12 20:27:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-06-12 20:27:32,232 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-06-12 20:27:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:32,232 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-06-12 20:27:32,232 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) [2021-06-12 20:27:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-06-12 20:27:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:32,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:32,274 INFO L472 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] [2021-06-12 20:27:32,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 20:27:32,274 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1360704794, now seen corresponding path program 2 times [2021-06-12 20:27:32,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:32,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390732483] [2021-06-12 20:27:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:32,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:32,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390732483] [2021-06-12 20:27:32,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390732483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:32,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78791847] [2021-06-12 20:27:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:32,290 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) [2021-06-12 20:27:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:32,579 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-06-12 20:27:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:27:32,581 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 [2021-06-12 20:27:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:32,665 INFO L225 Difference]: With dead ends: 24325 [2021-06-12 20:27:32,665 INFO L226 Difference]: Without dead ends: 24325 [2021-06-12 20:27:32,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-06-12 20:27:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-06-12 20:27:33,147 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) [2021-06-12 20:27:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-06-12 20:27:33,220 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-06-12 20:27:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:33,220 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-06-12 20:27:33,220 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) [2021-06-12 20:27:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-06-12 20:27:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:33,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:33,260 INFO L472 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] [2021-06-12 20:27:33,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 20:27:33,261 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-06-12 20:27:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:33,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334396635] [2021-06-12 20:27:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:33,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:33,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334396635] [2021-06-12 20:27:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334396635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:33,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050532534] [2021-06-12 20:27:33,301 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 [2021-06-12 20:27:33,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:27:33,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:27:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:33,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050532534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:33,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:33,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-12 20:27:33,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848045683] [2021-06-12 20:27:33,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:27:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:27:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:33,395 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) [2021-06-12 20:27:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:34,700 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-06-12 20:27:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:27:34,700 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 [2021-06-12 20:27:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:34,808 INFO L225 Difference]: With dead ends: 67384 [2021-06-12 20:27:34,808 INFO L226 Difference]: Without dead ends: 35063 [2021-06-12 20:27:34,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:27:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-06-12 20:27:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-06-12 20:27:35,342 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) [2021-06-12 20:27:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-06-12 20:27:35,400 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-06-12 20:27:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:35,400 INFO L482 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-06-12 20:27:35,400 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) [2021-06-12 20:27:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-06-12 20:27:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:35,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:35,436 INFO L472 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] [2021-06-12 20:27:35,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:35,637 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-06-12 20:27:35,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:35,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258994533] [2021-06-12 20:27:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:35,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:35,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258994533] [2021-06-12 20:27:35,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258994533] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:35,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:35,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:27:35,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312667332] [2021-06-12 20:27:35,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:27:35,667 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) [2021-06-12 20:27:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:35,795 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-06-12 20:27:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:35,796 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 [2021-06-12 20:27:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:35,845 INFO L225 Difference]: With dead ends: 20461 [2021-06-12 20:27:35,846 INFO L226 Difference]: Without dead ends: 19957 [2021-06-12 20:27:35,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-06-12 20:27:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-06-12 20:27:36,405 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) [2021-06-12 20:27:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-06-12 20:27:36,476 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-06-12 20:27:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:36,476 INFO L482 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-06-12 20:27:36,476 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) [2021-06-12 20:27:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-06-12 20:27:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:36,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:36,516 INFO L472 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] [2021-06-12 20:27:36,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 20:27:36,517 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:36,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-06-12 20:27:36,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:36,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47117000] [2021-06-12 20:27:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:36,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:36,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47117000] [2021-06-12 20:27:36,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47117000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:36,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:27:36,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:27:36,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427776025] [2021-06-12 20:27:36,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:27:36,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:27:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:27:36,541 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) [2021-06-12 20:27:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:36,897 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-06-12 20:27:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:27:36,899 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 [2021-06-12 20:27:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:36,959 INFO L225 Difference]: With dead ends: 21232 [2021-06-12 20:27:36,959 INFO L226 Difference]: Without dead ends: 20403 [2021-06-12 20:27:36,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:27:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-06-12 20:27:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-06-12 20:27:37,424 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) [2021-06-12 20:27:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-06-12 20:27:37,484 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-06-12 20:27:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:37,484 INFO L482 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-06-12 20:27:37,484 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) [2021-06-12 20:27:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-06-12 20:27:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:27:37,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:37,523 INFO L472 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] [2021-06-12 20:27:37,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 20:27:37,523 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-06-12 20:27:37,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:37,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076697124] [2021-06-12 20:27:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:37,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:37,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076697124] [2021-06-12 20:27:37,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076697124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:37,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722639727] [2021-06-12 20:27:37,582 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 [2021-06-12 20:27:37,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:27:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:27:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:37,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722639727] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:27:37,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:27:37,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-12 20:27:37,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430999252] [2021-06-12 20:27:37,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:27:37,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:37,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:27:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:37,665 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) [2021-06-12 20:27:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:37,795 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-06-12 20:27:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:27:37,796 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 [2021-06-12 20:27:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:37,845 INFO L225 Difference]: With dead ends: 19318 [2021-06-12 20:27:37,845 INFO L226 Difference]: Without dead ends: 18640 [2021-06-12 20:27:37,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:27:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-06-12 20:27:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-06-12 20:27:38,240 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) [2021-06-12 20:27:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-06-12 20:27:38,277 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-06-12 20:27:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:38,277 INFO L482 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-06-12 20:27:38,277 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) [2021-06-12 20:27:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-06-12 20:27:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:27:38,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:38,304 INFO L472 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] [2021-06-12 20:27:38,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:27:38,504 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-06-12 20:27:38,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:38,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605135991] [2021-06-12 20:27:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:38,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:38,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605135991] [2021-06-12 20:27:38,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605135991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:38,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405833725] [2021-06-12 20:27:38,552 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 [2021-06-12 20:27:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:27:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405833725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:38,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:38,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-12 20:27:38,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303965157] [2021-06-12 20:27:38,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:27:38,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:27:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:27:38,635 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) [2021-06-12 20:27:39,121 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 20:27:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:39,548 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-06-12 20:27:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:27:39,549 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 [2021-06-12 20:27:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:39,630 INFO L225 Difference]: With dead ends: 43919 [2021-06-12 20:27:39,631 INFO L226 Difference]: Without dead ends: 24373 [2021-06-12 20:27:39,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:27:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-06-12 20:27:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-06-12 20:27:40,068 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) [2021-06-12 20:27:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-06-12 20:27:40,094 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-06-12 20:27:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:40,094 INFO L482 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-06-12 20:27:40,095 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) [2021-06-12 20:27:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-06-12 20:27:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:27:40,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:40,111 INFO L472 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] [2021-06-12 20:27:40,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:40,313 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-06-12 20:27:40,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:40,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110378639] [2021-06-12 20:27:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:40,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110378639] [2021-06-12 20:27:40,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110378639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528071275] [2021-06-12 20:27:40,396 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 [2021-06-12 20:27:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:27:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:40,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528071275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:40,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:40,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-12 20:27:40,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955886095] [2021-06-12 20:27:40,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:27:40,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:40,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:27:40,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:27:40,488 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) [2021-06-12 20:27:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:41,774 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-06-12 20:27:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:27:41,774 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 [2021-06-12 20:27:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:41,838 INFO L225 Difference]: With dead ends: 33369 [2021-06-12 20:27:41,839 INFO L226 Difference]: Without dead ends: 23102 [2021-06-12 20:27:41,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 700.5ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:27:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-06-12 20:27:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-06-12 20:27:42,223 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) [2021-06-12 20:27:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-06-12 20:27:42,251 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-06-12 20:27:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:42,251 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-06-12 20:27:42,251 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) [2021-06-12 20:27:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-06-12 20:27:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:27:42,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:42,269 INFO L472 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] [2021-06-12 20:27:42,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:27:42,472 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-06-12 20:27:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:42,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948073926] [2021-06-12 20:27:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:42,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:42,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948073926] [2021-06-12 20:27:42,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948073926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:42,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7766159] [2021-06-12 20:27:42,562 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 [2021-06-12 20:27:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:27:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:42,717 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 [2021-06-12 20:27:42,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:42,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:42,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:42,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-06-12 20:27:42,742 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 [2021-06-12 20:27:42,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:42,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:42,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:42,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-12 20:27:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:42,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7766159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:42,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:42,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-12 20:27:42,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504543469] [2021-06-12 20:27:42,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:27:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:27:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:27:42,772 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) [2021-06-12 20:27:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:43,286 INFO L93 Difference]: Finished difference Result 34805 states and 160319 transitions. [2021-06-12 20:27:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:27:43,286 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 [2021-06-12 20:27:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:43,376 INFO L225 Difference]: With dead ends: 34805 [2021-06-12 20:27:43,376 INFO L226 Difference]: Without dead ends: 24590 [2021-06-12 20:27:43,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:27:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24590 states. [2021-06-12 20:27:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24590 to 9804. [2021-06-12 20:27:43,698 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) [2021-06-12 20:27:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-06-12 20:27:43,726 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-06-12 20:27:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:43,726 INFO L482 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-06-12 20:27:43,726 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) [2021-06-12 20:27:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-06-12 20:27:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:27:43,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:43,745 INFO L472 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] [2021-06-12 20:27:43,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:27:43,946 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:43,946 INFO L82 PathProgramCache]: Analyzing trace with hash 338294799, now seen corresponding path program 2 times [2021-06-12 20:27:43,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:43,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744599424] [2021-06-12 20:27:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:44,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744599424] [2021-06-12 20:27:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744599424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145335337] [2021-06-12 20:27:44,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:27:44,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:27:44,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:27:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:44,171 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 [2021-06-12 20:27:44,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:44,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:44,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:44,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:27:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145335337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:44,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:44,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:27:44,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254813767] [2021-06-12 20:27:44,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:27:44,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:27:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:27:44,204 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) [2021-06-12 20:27:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:44,722 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-06-12 20:27:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:27:44,723 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 [2021-06-12 20:27:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:44,766 INFO L225 Difference]: With dead ends: 32096 [2021-06-12 20:27:44,766 INFO L226 Difference]: Without dead ends: 16159 [2021-06-12 20:27:44,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-06-12 20:27:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-06-12 20:27:45,109 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) [2021-06-12 20:27:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-06-12 20:27:45,137 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-06-12 20:27:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:45,137 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-06-12 20:27:45,137 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) [2021-06-12 20:27:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-06-12 20:27:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:27:45,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:45,154 INFO L472 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] [2021-06-12 20:27:45,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:45,355 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:45,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash -806098199, now seen corresponding path program 3 times [2021-06-12 20:27:45,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:45,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651495384] [2021-06-12 20:27:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:45,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:45,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651495384] [2021-06-12 20:27:45,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651495384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:45,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083002343] [2021-06-12 20:27:45,459 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 [2021-06-12 20:27:45,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:27:45,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:27:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:45,561 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 [2021-06-12 20:27:45,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:45,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:45,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:45,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:27:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:45,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083002343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:45,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:45,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:27:45,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987391734] [2021-06-12 20:27:45,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:27:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:27:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:27:45,598 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) [2021-06-12 20:27:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:46,328 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-06-12 20:27:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:27:46,328 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 [2021-06-12 20:27:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:46,387 INFO L225 Difference]: With dead ends: 38248 [2021-06-12 20:27:46,387 INFO L226 Difference]: Without dead ends: 19645 [2021-06-12 20:27:46,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:27:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-06-12 20:27:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-06-12 20:27:46,634 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) [2021-06-12 20:27:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-06-12 20:27:46,665 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-06-12 20:27:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:46,665 INFO L482 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-06-12 20:27:46,665 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) [2021-06-12 20:27:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-06-12 20:27:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:27:46,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:46,685 INFO L472 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] [2021-06-12 20:27:46,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:46,886 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1743444361, now seen corresponding path program 4 times [2021-06-12 20:27:46,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:46,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947875280] [2021-06-12 20:27:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:47,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947875280] [2021-06-12 20:27:47,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947875280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913658723] [2021-06-12 20:27:47,014 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 [2021-06-12 20:27:47,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:27:47,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:27:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:47,091 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 [2021-06-12 20:27:47,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:47,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 20:27:47,112 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 [2021-06-12 20:27:47,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:47,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-06-12 20:27:47,156 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 [2021-06-12 20:27:47,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:47,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:27:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:47,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913658723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:47,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:47,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 20:27:47,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360918007] [2021-06-12 20:27:47,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:27:47,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:47,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:27:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:27:47,277 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) [2021-06-12 20:27:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:48,228 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-06-12 20:27:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:27:48,229 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 [2021-06-12 20:27:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:48,275 INFO L225 Difference]: With dead ends: 29883 [2021-06-12 20:27:48,275 INFO L226 Difference]: Without dead ends: 17348 [2021-06-12 20:27:48,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:27:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-06-12 20:27:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-06-12 20:27:48,603 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) [2021-06-12 20:27:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-06-12 20:27:48,636 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-06-12 20:27:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:48,637 INFO L482 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-06-12 20:27:48,637 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) [2021-06-12 20:27:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-06-12 20:27:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:27:48,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:48,657 INFO L472 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] [2021-06-12 20:27:48,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 20:27:48,859 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1377639985, now seen corresponding path program 5 times [2021-06-12 20:27:48,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:48,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849797178] [2021-06-12 20:27:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:48,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849797178] [2021-06-12 20:27:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849797178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:48,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215285974] [2021-06-12 20:27:48,987 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 [2021-06-12 20:27:49,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:27:49,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:27:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:49,165 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 [2021-06-12 20:27:49,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:49,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-12 20:27:49,204 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 [2021-06-12 20:27:49,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:49,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-12 20:27:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:49,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215285974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:49,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:49,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 20:27:49,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745549927] [2021-06-12 20:27:49,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:27:49,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:49,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:27:49,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:27:49,245 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:50,453 INFO L93 Difference]: Finished difference Result 37384 states and 169706 transitions. [2021-06-12 20:27:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:27:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:27:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:50,513 INFO L225 Difference]: With dead ends: 37384 [2021-06-12 20:27:50,513 INFO L226 Difference]: Without dead ends: 20919 [2021-06-12 20:27:50,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 824.1ms TimeCoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:27:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20919 states. [2021-06-12 20:27:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20919 to 11315. [2021-06-12 20:27:50,790 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) [2021-06-12 20:27:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-06-12 20:27:50,827 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-06-12 20:27:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:50,828 INFO L482 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-06-12 20:27:50,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-06-12 20:27:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:27:50,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:50,851 INFO L472 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] [2021-06-12 20:27:51,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:51,065 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1173646258, now seen corresponding path program 6 times [2021-06-12 20:27:51,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:51,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101225405] [2021-06-12 20:27:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:51,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101225405] [2021-06-12 20:27:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101225405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118001981] [2021-06-12 20:27:51,095 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 [2021-06-12 20:27:51,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:27:51,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:27:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:51,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118001981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:51,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:51,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:27:51,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841248031] [2021-06-12 20:27:51,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:27:51,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:51,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:27:51,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:27:51,220 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) [2021-06-12 20:27:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:51,851 INFO L93 Difference]: Finished difference Result 38369 states and 174934 transitions. [2021-06-12 20:27:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:27:51,851 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 [2021-06-12 20:27:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:51,977 INFO L225 Difference]: With dead ends: 38369 [2021-06-12 20:27:51,977 INFO L226 Difference]: Without dead ends: 38168 [2021-06-12 20:27:51,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:27:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38168 states. [2021-06-12 20:27:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38168 to 27191. [2021-06-12 20:27:52,587 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) [2021-06-12 20:27:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27191 states to 27191 states and 126076 transitions. [2021-06-12 20:27:52,682 INFO L78 Accepts]: Start accepts. Automaton has 27191 states and 126076 transitions. Word has length 42 [2021-06-12 20:27:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:52,682 INFO L482 AbstractCegarLoop]: Abstraction has 27191 states and 126076 transitions. [2021-06-12 20:27:52,683 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) [2021-06-12 20:27:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 27191 states and 126076 transitions. [2021-06-12 20:27:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:27:52,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:52,744 INFO L472 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] [2021-06-12 20:27:52,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 20:27:52,945 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash 389104470, now seen corresponding path program 7 times [2021-06-12 20:27:52,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:52,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070030990] [2021-06-12 20:27:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:53,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070030990] [2021-06-12 20:27:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070030990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336172400] [2021-06-12 20:27:53,023 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 [2021-06-12 20:27:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:27:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:27:53,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336172400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:53,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:53,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:27:53,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680594919] [2021-06-12 20:27:53,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:27:53,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:53,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:27:53,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:27:53,114 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) [2021-06-12 20:27:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:53,463 INFO L93 Difference]: Finished difference Result 51293 states and 237263 transitions. [2021-06-12 20:27:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:27:53,463 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 [2021-06-12 20:27:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:53,639 INFO L225 Difference]: With dead ends: 51293 [2021-06-12 20:27:53,640 INFO L226 Difference]: Without dead ends: 51193 [2021-06-12 20:27:53,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:27:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-06-12 20:27:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 32278. [2021-06-12 20:27:54,503 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) [2021-06-12 20:27:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 152515 transitions. [2021-06-12 20:27:54,616 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 152515 transitions. Word has length 42 [2021-06-12 20:27:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:54,616 INFO L482 AbstractCegarLoop]: Abstraction has 32278 states and 152515 transitions. [2021-06-12 20:27:54,616 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) [2021-06-12 20:27:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 152515 transitions. [2021-06-12 20:27:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:27:54,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:54,682 INFO L472 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] [2021-06-12 20:27:54,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:54,887 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1709365898, now seen corresponding path program 8 times [2021-06-12 20:27:54,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:54,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484867721] [2021-06-12 20:27:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:54,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484867721] [2021-06-12 20:27:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484867721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509426205] [2021-06-12 20:27:54,910 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 [2021-06-12 20:27:54,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:27:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:27:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509426205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:54,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:54,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:27:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958740783] [2021-06-12 20:27:54,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:27:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:27:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:27:54,989 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) [2021-06-12 20:27:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:55,300 INFO L93 Difference]: Finished difference Result 48003 states and 221808 transitions. [2021-06-12 20:27:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:27:55,301 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 [2021-06-12 20:27:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:55,450 INFO L225 Difference]: With dead ends: 48003 [2021-06-12 20:27:55,450 INFO L226 Difference]: Without dead ends: 48003 [2021-06-12 20:27:55,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:27:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48003 states. [2021-06-12 20:27:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48003 to 31277. [2021-06-12 20:27:56,320 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) [2021-06-12 20:27:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 147558 transitions. [2021-06-12 20:27:56,451 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 147558 transitions. Word has length 42 [2021-06-12 20:27:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:56,451 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 147558 transitions. [2021-06-12 20:27:56,451 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) [2021-06-12 20:27:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 147558 transitions. [2021-06-12 20:27:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:27:56,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:56,522 INFO L472 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] [2021-06-12 20:27:56,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 20:27:56,722 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:27:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash 31127056, now seen corresponding path program 9 times [2021-06-12 20:27:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:56,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153440812] [2021-06-12 20:27:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:56,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:56,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153440812] [2021-06-12 20:27:56,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153440812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:56,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768918962] [2021-06-12 20:27:56,756 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 [2021-06-12 20:27:56,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:27:56,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:27:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:27:56,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768918962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:56,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:56,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 20:27:56,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371905268] [2021-06-12 20:27:56,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:27:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:27:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:27:56,850 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) [2021-06-12 20:27:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:57,254 INFO L93 Difference]: Finished difference Result 59008 states and 276119 transitions. [2021-06-12 20:27:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:27:57,254 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 [2021-06-12 20:27:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:57,463 INFO L225 Difference]: With dead ends: 59008 [2021-06-12 20:27:57,463 INFO L226 Difference]: Without dead ends: 59008 [2021-06-12 20:27:57,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:27:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59008 states. [2021-06-12 20:27:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59008 to 42789. [2021-06-12 20:27:59,637 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) [2021-06-12 20:27:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42789 states to 42789 states and 204938 transitions. [2021-06-12 20:27:59,803 INFO L78 Accepts]: Start accepts. Automaton has 42789 states and 204938 transitions. Word has length 42 [2021-06-12 20:27:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:59,804 INFO L482 AbstractCegarLoop]: Abstraction has 42789 states and 204938 transitions. [2021-06-12 20:27:59,804 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) [2021-06-12 20:27:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42789 states and 204938 transitions. [2021-06-12 20:27:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:27:59,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:59,890 INFO L472 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] [2021-06-12 20:28:00,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:28:00,092 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:28:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1577231536, now seen corresponding path program 10 times [2021-06-12 20:28:00,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:00,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147173077] [2021-06-12 20:28:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:28:00,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147173077] [2021-06-12 20:28:00,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147173077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399163512] [2021-06-12 20:28:00,115 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 [2021-06-12 20:28:00,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:28:00,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:00,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:28:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:28:00,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399163512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:00,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:00,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:28:00,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694845877] [2021-06-12 20:28:00,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:28:00,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:00,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:28:00,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:28:00,196 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) [2021-06-12 20:28:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:00,683 INFO L93 Difference]: Finished difference Result 49547 states and 233319 transitions. [2021-06-12 20:28:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:28:00,683 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 [2021-06-12 20:28:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:00,856 INFO L225 Difference]: With dead ends: 49547 [2021-06-12 20:28:00,856 INFO L226 Difference]: Without dead ends: 49492 [2021-06-12 20:28:00,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:28:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49492 states. [2021-06-12 20:28:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49492 to 42675. [2021-06-12 20:28:01,949 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) [2021-06-12 20:28:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42675 states to 42675 states and 204519 transitions. [2021-06-12 20:28:02,096 INFO L78 Accepts]: Start accepts. Automaton has 42675 states and 204519 transitions. Word has length 42 [2021-06-12 20:28:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:02,097 INFO L482 AbstractCegarLoop]: Abstraction has 42675 states and 204519 transitions. [2021-06-12 20:28:02,097 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) [2021-06-12 20:28:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 42675 states and 204519 transitions. [2021-06-12 20:28:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:28:02,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:02,186 INFO L472 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] [2021-06-12 20:28:02,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:28:02,387 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:28:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash -241142803, now seen corresponding path program 11 times [2021-06-12 20:28:02,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:02,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493116804] [2021-06-12 20:28:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:28:02,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493116804] [2021-06-12 20:28:02,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493116804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:02,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687731326] [2021-06-12 20:28:02,421 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 [2021-06-12 20:28:02,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:28:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:28:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:28:02,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687731326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:02,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:02,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 20:28:02,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904857815] [2021-06-12 20:28:02,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:28:02,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:28:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:28:02,533 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) [2021-06-12 20:28:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:03,646 INFO L93 Difference]: Finished difference Result 86712 states and 419227 transitions. [2021-06-12 20:28:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:28:03,647 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 [2021-06-12 20:28:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:04,027 INFO L225 Difference]: With dead ends: 86712 [2021-06-12 20:28:04,027 INFO L226 Difference]: Without dead ends: 85513 [2021-06-12 20:28:04,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:28:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85513 states. [2021-06-12 20:28:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85513 to 68374. [2021-06-12 20:28:05,757 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)