/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:14:24,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:14:24,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:14:24,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 14:14:24,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 14:14:24,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 14:14:24,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 14:14:24,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 14:14:24,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 14:14:24,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 14:14:24,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 14:14:24,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 14:14:24,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 14:14:24,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 14:14:24,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 14:14:24,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 14:14:24,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 14:14:24,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 14:14:24,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 14:14:24,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 14:14:24,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 14:14:24,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 14:14:24,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 14:14:24,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 14:14:24,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 14:14:24,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 14:14:24,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 14:14:24,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 14:14:24,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 14:14:24,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 14:14:24,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 14:14:24,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 14:14:24,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 14:14:24,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 14:14:24,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 14:14:24,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 14:14:24,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 14:14:24,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 14:14:24,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:14:24,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:14:24,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:14:24,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:14:24,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:14:24,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:14:24,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:14:24,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:14:24,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:14:24,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:14:24,439 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:14:24,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:14:24,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:14:24,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:14:24,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:14:24,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:14:24,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:14:24,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:14:24,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:14:24,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:14:24,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:14:24,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:14:24,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:14:24,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:14:24,662 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:14:24,663 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:14:24,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2021-06-05 14:14:24,664 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2021-06-05 14:14:24,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:14:24,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:14:24,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:14:24,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:14:24,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:14:24,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:14:24,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:14:24,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:14:24,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:14:24,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... [2021-06-05 14:14:24,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:14:24,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:14:24,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:14:24,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:14:24,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:14:24,782 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:14:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:14:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:14:24,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:14:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:14:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:14:24,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:14:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:14:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:14:24,784 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:14:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:14:24,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:14:24,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 14:14:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 14:14:24,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 14:14:24,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 14:14:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 14:14:24,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 14:14:24,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 14:14:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 14:14:24,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 14:14:24,787 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:14:24,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:14:24,912 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:14:24,913 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:14:24 BoogieIcfgContainer [2021-06-05 14:14:24,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:14:24,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:14:24,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:14:24,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:14:24,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:24" (1/2) ... [2021-06-05 14:14:24,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ee877f and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:14:24, skipping insertion in model container [2021-06-05 14:14:24,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:14:24" (2/2) ... [2021-06-05 14:14:24,918 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2021-06-05 14:14:24,922 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:14:24,922 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:14:24,922 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:14:24,923 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:14:24,991 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-05 14:14:25,015 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 14:14:25,037 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:14:25,038 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:14:25,038 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:14:25,038 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:14:25,038 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:14:25,038 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:14:25,038 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:14:25,038 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:14:25,048 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 47 transitions, 142 flow [2021-06-05 14:14:25,434 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:14:25,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:25,524 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:25,525 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:25,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1044529094, now seen corresponding path program 1 times [2021-06-05 14:14:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:25,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112761343] [2021-06-05 14:14:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:25,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112761343] [2021-06-05 14:14:25,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112761343] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:25,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:25,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:14:25,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517356411] [2021-06-05 14:14:25,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:14:25,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:14:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:25,781 INFO L87 Difference]: Start difference. First operand has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 0 states have call successors, (0), 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 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:26,136 INFO L93 Difference]: Finished difference Result 13654 states and 80102 transitions. [2021-06-05 14:14:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:14:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 14:14:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:26,327 INFO L225 Difference]: With dead ends: 13654 [2021-06-05 14:14:26,327 INFO L226 Difference]: Without dead ends: 13527 [2021-06-05 14:14:26,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-06-05 14:14:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8158. [2021-06-05 14:14:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 5.851538555841609) internal successors, (47731), 8157 states have internal predecessors, (47731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 47731 transitions. [2021-06-05 14:14:27,022 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 47731 transitions. Word has length 27 [2021-06-05 14:14:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:27,025 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 47731 transitions. [2021-06-05 14:14:27,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 47731 transitions. [2021-06-05 14:14:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:27,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:27,133 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:27,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:14:27,141 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:27,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1567455164, now seen corresponding path program 1 times [2021-06-05 14:14:27,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:27,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337167185] [2021-06-05 14:14:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:27,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:27,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337167185] [2021-06-05 14:14:27,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337167185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:27,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771975619] [2021-06-05 14:14:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:27,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:14:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771975619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:27,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:27,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 14:14:27,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207314734] [2021-06-05 14:14:27,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:14:27,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:14:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:14:27,460 INFO L87 Difference]: Start difference. First operand 8158 states and 47731 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:27,878 INFO L93 Difference]: Finished difference Result 21114 states and 121111 transitions. [2021-06-05 14:14:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:14:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:27,994 INFO L225 Difference]: With dead ends: 21114 [2021-06-05 14:14:27,994 INFO L226 Difference]: Without dead ends: 21114 [2021-06-05 14:14:27,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:14:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-06-05 14:14:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 10411. [2021-06-05 14:14:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 5.94447646493756) internal successors, (61882), 10410 states have internal predecessors, (61882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 61882 transitions. [2021-06-05 14:14:28,840 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 61882 transitions. Word has length 29 [2021-06-05 14:14:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:28,840 INFO L482 AbstractCegarLoop]: Abstraction has 10411 states and 61882 transitions. [2021-06-05 14:14:28,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 61882 transitions. [2021-06-05 14:14:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:28,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:28,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:29,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 14:14:29,104 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1130933432, now seen corresponding path program 1 times [2021-06-05 14:14:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:29,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502492018] [2021-06-05 14:14:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:29,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:29,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502492018] [2021-06-05 14:14:29,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502492018] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:29,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:29,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942026628] [2021-06-05 14:14:29,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:29,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:29,131 INFO L87 Difference]: Start difference. First operand 10411 states and 61882 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:29,344 INFO L93 Difference]: Finished difference Result 14973 states and 85568 transitions. [2021-06-05 14:14:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:14:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:29,405 INFO L225 Difference]: With dead ends: 14973 [2021-06-05 14:14:29,405 INFO L226 Difference]: Without dead ends: 14893 [2021-06-05 14:14:29,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14893 states. [2021-06-05 14:14:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14893 to 11995. [2021-06-05 14:14:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 5.837335334333834) internal successors, (70013), 11994 states have internal predecessors, (70013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 70013 transitions. [2021-06-05 14:14:29,967 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 70013 transitions. Word has length 29 [2021-06-05 14:14:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:29,967 INFO L482 AbstractCegarLoop]: Abstraction has 11995 states and 70013 transitions. [2021-06-05 14:14:29,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 70013 transitions. [2021-06-05 14:14:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:30,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:30,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:30,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:14:30,005 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash 133583944, now seen corresponding path program 1 times [2021-06-05 14:14:30,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:30,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142864727] [2021-06-05 14:14:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:30,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142864727] [2021-06-05 14:14:30,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142864727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50775769] [2021-06-05 14:14:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:30,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:14:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:30,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50775769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:30,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:30,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 14:14:30,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967090451] [2021-06-05 14:14:30,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:30,161 INFO L87 Difference]: Start difference. First operand 11995 states and 70013 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:30,589 INFO L93 Difference]: Finished difference Result 30637 states and 176852 transitions. [2021-06-05 14:14:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:30,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:30,747 INFO L225 Difference]: With dead ends: 30637 [2021-06-05 14:14:30,747 INFO L226 Difference]: Without dead ends: 30637 [2021-06-05 14:14:30,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30637 states. [2021-06-05 14:14:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30637 to 15205. [2021-06-05 14:14:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15205 states, 15204 states have (on average 5.956393054459353) internal successors, (90561), 15204 states have internal predecessors, (90561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15205 states to 15205 states and 90561 transitions. [2021-06-05 14:14:31,534 INFO L78 Accepts]: Start accepts. Automaton has 15205 states and 90561 transitions. Word has length 29 [2021-06-05 14:14:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:31,534 INFO L482 AbstractCegarLoop]: Abstraction has 15205 states and 90561 transitions. [2021-06-05 14:14:31,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 15205 states and 90561 transitions. [2021-06-05 14:14:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:31,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:31,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:31,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:31,781 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -8467834, now seen corresponding path program 1 times [2021-06-05 14:14:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:31,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515785022] [2021-06-05 14:14:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:31,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515785022] [2021-06-05 14:14:31,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515785022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:31,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733704237] [2021-06-05 14:14:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:14:31,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733704237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:31,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:31,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 14:14:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115595474] [2021-06-05 14:14:31,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:31,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:31,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:31,891 INFO L87 Difference]: Start difference. First operand 15205 states and 90561 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:32,362 INFO L93 Difference]: Finished difference Result 36877 states and 218066 transitions. [2021-06-05 14:14:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:32,524 INFO L225 Difference]: With dead ends: 36877 [2021-06-05 14:14:32,524 INFO L226 Difference]: Without dead ends: 36877 [2021-06-05 14:14:32,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36877 states. [2021-06-05 14:14:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36877 to 20146. [2021-06-05 14:14:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20146 states, 20145 states have (on average 6.068304790270538) internal successors, (122246), 20145 states have internal predecessors, (122246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 122246 transitions. [2021-06-05 14:14:33,590 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 122246 transitions. Word has length 29 [2021-06-05 14:14:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:33,590 INFO L482 AbstractCegarLoop]: Abstraction has 20146 states and 122246 transitions. [2021-06-05 14:14:33,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 122246 transitions. [2021-06-05 14:14:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:33,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:33,653 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:33,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:33,869 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1681375674, now seen corresponding path program 1 times [2021-06-05 14:14:33,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:33,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200166871] [2021-06-05 14:14:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:33,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:33,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200166871] [2021-06-05 14:14:33,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200166871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:33,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:33,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:33,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374636826] [2021-06-05 14:14:33,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:33,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:33,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:33,904 INFO L87 Difference]: Start difference. First operand 20146 states and 122246 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:34,465 INFO L93 Difference]: Finished difference Result 31288 states and 185448 transitions. [2021-06-05 14:14:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:34,603 INFO L225 Difference]: With dead ends: 31288 [2021-06-05 14:14:34,603 INFO L226 Difference]: Without dead ends: 31121 [2021-06-05 14:14:34,604 INFO L777 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 [2021-06-05 14:14:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31121 states. [2021-06-05 14:14:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31121 to 21451. [2021-06-05 14:14:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21451 states, 21450 states have (on average 6.020652680652681) internal successors, (129143), 21450 states have internal predecessors, (129143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21451 states to 21451 states and 129143 transitions. [2021-06-05 14:14:35,568 INFO L78 Accepts]: Start accepts. Automaton has 21451 states and 129143 transitions. Word has length 29 [2021-06-05 14:14:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:35,568 INFO L482 AbstractCegarLoop]: Abstraction has 21451 states and 129143 transitions. [2021-06-05 14:14:35,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21451 states and 129143 transitions. [2021-06-05 14:14:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:35,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:35,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:35,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:14:35,626 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1659787256, now seen corresponding path program 1 times [2021-06-05 14:14:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:35,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225170066] [2021-06-05 14:14:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:35,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:35,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225170066] [2021-06-05 14:14:35,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225170066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:35,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:35,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:35,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418452557] [2021-06-05 14:14:35,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:35,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:35,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:35,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:35,646 INFO L87 Difference]: Start difference. First operand 21451 states and 129143 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:35,940 INFO L93 Difference]: Finished difference Result 36020 states and 210532 transitions. [2021-06-05 14:14:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:36,106 INFO L225 Difference]: With dead ends: 36020 [2021-06-05 14:14:36,106 INFO L226 Difference]: Without dead ends: 35844 [2021-06-05 14:14:36,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35844 states. [2021-06-05 14:14:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35844 to 23309. [2021-06-05 14:14:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23309 states, 23308 states have (on average 5.963188604770894) internal successors, (138990), 23308 states have internal predecessors, (138990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23309 states to 23309 states and 138990 transitions. [2021-06-05 14:14:37,261 INFO L78 Accepts]: Start accepts. Automaton has 23309 states and 138990 transitions. Word has length 29 [2021-06-05 14:14:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:37,261 INFO L482 AbstractCegarLoop]: Abstraction has 23309 states and 138990 transitions. [2021-06-05 14:14:37,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23309 states and 138990 transitions. [2021-06-05 14:14:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:37,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:37,640 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:37,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:14:37,640 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash 25043654, now seen corresponding path program 2 times [2021-06-05 14:14:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:37,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711274863] [2021-06-05 14:14:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:37,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:37,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711274863] [2021-06-05 14:14:37,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711274863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:37,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:37,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:37,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794792755] [2021-06-05 14:14:37,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:37,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:37,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:37,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:37,677 INFO L87 Difference]: Start difference. First operand 23309 states and 138990 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:38,019 INFO L93 Difference]: Finished difference Result 35264 states and 207669 transitions. [2021-06-05 14:14:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:38,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:38,187 INFO L225 Difference]: With dead ends: 35264 [2021-06-05 14:14:38,187 INFO L226 Difference]: Without dead ends: 35264 [2021-06-05 14:14:38,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35264 states. [2021-06-05 14:14:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35264 to 26215. [2021-06-05 14:14:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26215 states, 26214 states have (on average 5.978828107118334) internal successors, (156729), 26214 states have internal predecessors, (156729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26215 states to 26215 states and 156729 transitions. [2021-06-05 14:14:39,396 INFO L78 Accepts]: Start accepts. Automaton has 26215 states and 156729 transitions. Word has length 29 [2021-06-05 14:14:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:39,396 INFO L482 AbstractCegarLoop]: Abstraction has 26215 states and 156729 transitions. [2021-06-05 14:14:39,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26215 states and 156729 transitions. [2021-06-05 14:14:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:39,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:39,496 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:39,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:14:39,497 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:39,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1371840000, now seen corresponding path program 2 times [2021-06-05 14:14:39,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:39,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350002003] [2021-06-05 14:14:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:39,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:39,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350002003] [2021-06-05 14:14:39,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350002003] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:39,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:39,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:39,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377882182] [2021-06-05 14:14:39,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:39,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:39,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:39,571 INFO L87 Difference]: Start difference. First operand 26215 states and 156729 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:39,952 INFO L93 Difference]: Finished difference Result 35265 states and 205937 transitions. [2021-06-05 14:14:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:40,151 INFO L225 Difference]: With dead ends: 35265 [2021-06-05 14:14:40,152 INFO L226 Difference]: Without dead ends: 35115 [2021-06-05 14:14:40,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35115 states. [2021-06-05 14:14:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35115 to 27707. [2021-06-05 14:14:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27707 states, 27706 states have (on average 5.942972641305133) internal successors, (164656), 27706 states have internal predecessors, (164656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27707 states to 27707 states and 164656 transitions. [2021-06-05 14:14:41,554 INFO L78 Accepts]: Start accepts. Automaton has 27707 states and 164656 transitions. Word has length 29 [2021-06-05 14:14:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:41,555 INFO L482 AbstractCegarLoop]: Abstraction has 27707 states and 164656 transitions. [2021-06-05 14:14:41,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 27707 states and 164656 transitions. [2021-06-05 14:14:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:41,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:41,661 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:41,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:14:41,662 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash -490301020, now seen corresponding path program 2 times [2021-06-05 14:14:41,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:41,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275422284] [2021-06-05 14:14:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:41,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:41,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275422284] [2021-06-05 14:14:41,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275422284] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:41,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:41,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153741107] [2021-06-05 14:14:41,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:41,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:41,722 INFO L87 Difference]: Start difference. First operand 27707 states and 164656 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:42,538 INFO L93 Difference]: Finished difference Result 45133 states and 263334 transitions. [2021-06-05 14:14:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:42,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:42,770 INFO L225 Difference]: With dead ends: 45133 [2021-06-05 14:14:42,771 INFO L226 Difference]: Without dead ends: 45133 [2021-06-05 14:14:42,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45133 states. [2021-06-05 14:14:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45133 to 32206. [2021-06-05 14:14:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32206 states, 32205 states have (on average 5.952895513119081) internal successors, (191713), 32205 states have internal predecessors, (191713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32206 states to 32206 states and 191713 transitions. [2021-06-05 14:14:44,441 INFO L78 Accepts]: Start accepts. Automaton has 32206 states and 191713 transitions. Word has length 29 [2021-06-05 14:14:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:44,441 INFO L482 AbstractCegarLoop]: Abstraction has 32206 states and 191713 transitions. [2021-06-05 14:14:44,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 32206 states and 191713 transitions. [2021-06-05 14:14:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:44,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:44,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:44,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:14:44,558 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:44,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1923189408, now seen corresponding path program 2 times [2021-06-05 14:14:44,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:44,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040132519] [2021-06-05 14:14:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:44,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040132519] [2021-06-05 14:14:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040132519] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:44,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:44,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:44,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046384941] [2021-06-05 14:14:44,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:44,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:44,575 INFO L87 Difference]: Start difference. First operand 32206 states and 191713 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:45,454 INFO L93 Difference]: Finished difference Result 45104 states and 260644 transitions. [2021-06-05 14:14:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:45,755 INFO L225 Difference]: With dead ends: 45104 [2021-06-05 14:14:45,755 INFO L226 Difference]: Without dead ends: 44872 [2021-06-05 14:14:45,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44872 states. [2021-06-05 14:14:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44872 to 34465. [2021-06-05 14:14:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34465 states, 34464 states have (on average 5.9103122098421546) internal successors, (203693), 34464 states have internal predecessors, (203693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34465 states to 34465 states and 203693 transitions. [2021-06-05 14:14:47,584 INFO L78 Accepts]: Start accepts. Automaton has 34465 states and 203693 transitions. Word has length 29 [2021-06-05 14:14:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:47,584 INFO L482 AbstractCegarLoop]: Abstraction has 34465 states and 203693 transitions. [2021-06-05 14:14:47,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 34465 states and 203693 transitions. [2021-06-05 14:14:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:47,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:47,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:47,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 14:14:47,707 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:47,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2077952268, now seen corresponding path program 2 times [2021-06-05 14:14:47,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:47,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823536708] [2021-06-05 14:14:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:47,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:47,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823536708] [2021-06-05 14:14:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823536708] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:47,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:47,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:14:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049091360] [2021-06-05 14:14:47,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:14:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:14:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:47,771 INFO L87 Difference]: Start difference. First operand 34465 states and 203693 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:48,162 INFO L93 Difference]: Finished difference Result 47735 states and 276681 transitions. [2021-06-05 14:14:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-06-05 14:14:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:48,390 INFO L225 Difference]: With dead ends: 47735 [2021-06-05 14:14:48,391 INFO L226 Difference]: Without dead ends: 47735 [2021-06-05 14:14:48,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47735 states. [2021-06-05 14:14:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47735 to 37708. [2021-06-05 14:14:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37708 states, 37707 states have (on average 5.9143660328321) internal successors, (223013), 37707 states have internal predecessors, (223013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37708 states to 37708 states and 223013 transitions. [2021-06-05 14:14:50,888 INFO L78 Accepts]: Start accepts. Automaton has 37708 states and 223013 transitions. Word has length 29 [2021-06-05 14:14:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:50,889 INFO L482 AbstractCegarLoop]: Abstraction has 37708 states and 223013 transitions. [2021-06-05 14:14:50,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37708 states and 223013 transitions. [2021-06-05 14:14:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:14:51,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:51,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:51,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:14:51,020 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1308062790, now seen corresponding path program 1 times [2021-06-05 14:14:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:51,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427422465] [2021-06-05 14:14:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:51,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:51,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427422465] [2021-06-05 14:14:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427422465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:51,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400848552] [2021-06-05 14:14:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:51,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:14:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:51,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400848552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:51,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:51,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-05 14:14:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213712426] [2021-06-05 14:14:51,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:14:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:14:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:51,356 INFO L87 Difference]: Start difference. First operand 37708 states and 223013 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:51,863 INFO L93 Difference]: Finished difference Result 48610 states and 280421 transitions. [2021-06-05 14:14:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 31 [2021-06-05 14:14:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:52,121 INFO L225 Difference]: With dead ends: 48610 [2021-06-05 14:14:52,121 INFO L226 Difference]: Without dead ends: 48062 [2021-06-05 14:14:52,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48062 states. [2021-06-05 14:14:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48062 to 40315. [2021-06-05 14:14:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40315 states, 40314 states have (on average 5.896785235898199) internal successors, (237723), 40314 states have internal predecessors, (237723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40315 states to 40315 states and 237723 transitions. [2021-06-05 14:14:53,901 INFO L78 Accepts]: Start accepts. Automaton has 40315 states and 237723 transitions. Word has length 31 [2021-06-05 14:14:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:53,901 INFO L482 AbstractCegarLoop]: Abstraction has 40315 states and 237723 transitions. [2021-06-05 14:14:53,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 40315 states and 237723 transitions. [2021-06-05 14:14:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:14:54,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:54,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:54,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:54,676 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash -280107528, now seen corresponding path program 2 times [2021-06-05 14:14:54,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:54,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571528185] [2021-06-05 14:14:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:14:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571528185] [2021-06-05 14:14:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571528185] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:54,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:54,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:14:54,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366251748] [2021-06-05 14:14:54,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:14:54,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:14:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:54,747 INFO L87 Difference]: Start difference. First operand 40315 states and 237723 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:55,156 INFO L93 Difference]: Finished difference Result 50404 states and 290958 transitions. [2021-06-05 14:14:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:14:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 14:14:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:55,365 INFO L225 Difference]: With dead ends: 50404 [2021-06-05 14:14:55,366 INFO L226 Difference]: Without dead ends: 49856 [2021-06-05 14:14:55,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:14:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2021-06-05 14:14:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 42372. [2021-06-05 14:14:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42372 states, 42371 states have (on average 5.882112765806802) internal successors, (249231), 42371 states have internal predecessors, (249231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42372 states to 42372 states and 249231 transitions. [2021-06-05 14:14:57,037 INFO L78 Accepts]: Start accepts. Automaton has 42372 states and 249231 transitions. Word has length 31 [2021-06-05 14:14:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:57,037 INFO L482 AbstractCegarLoop]: Abstraction has 42372 states and 249231 transitions. [2021-06-05 14:14:57,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 42372 states and 249231 transitions. [2021-06-05 14:14:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:14:57,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:57,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:57,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 14:14:57,164 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:57,164 INFO L82 PathProgramCache]: Analyzing trace with hash -904748022, now seen corresponding path program 1 times [2021-06-05 14:14:57,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:57,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062144751] [2021-06-05 14:14:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:57,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:57,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062144751] [2021-06-05 14:14:57,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062144751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:57,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903782022] [2021-06-05 14:14:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:14:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:57,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903782022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:57,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:57,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-05 14:14:57,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091439843] [2021-06-05 14:14:57,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:14:57,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:14:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:57,334 INFO L87 Difference]: Start difference. First operand 42372 states and 249231 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:58,237 INFO L93 Difference]: Finished difference Result 53113 states and 305911 transitions. [2021-06-05 14:14:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:14:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 31 [2021-06-05 14:14:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:58,505 INFO L225 Difference]: With dead ends: 53113 [2021-06-05 14:14:58,505 INFO L226 Difference]: Without dead ends: 52637 [2021-06-05 14:14:58,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:14:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52637 states. [2021-06-05 14:14:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52637 to 45439. [2021-06-05 14:15:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 5.865487037281571) internal successors, (266516), 45438 states have internal predecessors, (266516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 266516 transitions. [2021-06-05 14:15:00,245 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 266516 transitions. Word has length 31 [2021-06-05 14:15:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:00,245 INFO L482 AbstractCegarLoop]: Abstraction has 45439 states and 266516 transitions. [2021-06-05 14:15:00,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 266516 transitions. [2021-06-05 14:15:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:15:00,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:00,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:00,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:15:00,574 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1844291576, now seen corresponding path program 2 times [2021-06-05 14:15:00,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:00,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943294427] [2021-06-05 14:15:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:15:00,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943294427] [2021-06-05 14:15:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943294427] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:15:00,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:15:00,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:15:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333801647] [2021-06-05 14:15:00,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:15:00,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:00,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:15:00,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:15:00,621 INFO L87 Difference]: Start difference. First operand 45439 states and 266516 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:01,514 INFO L93 Difference]: Finished difference Result 55542 states and 319905 transitions. [2021-06-05 14:15:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:15:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 14:15:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:01,790 INFO L225 Difference]: With dead ends: 55542 [2021-06-05 14:15:01,790 INFO L226 Difference]: Without dead ends: 55066 [2021-06-05 14:15:01,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:15:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55066 states. [2021-06-05 14:15:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55066 to 48103. [2021-06-05 14:15:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48103 states, 48102 states have (on average 5.849070724709991) internal successors, (281352), 48102 states have internal predecessors, (281352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48103 states to 48103 states and 281352 transitions. [2021-06-05 14:15:03,597 INFO L78 Accepts]: Start accepts. Automaton has 48103 states and 281352 transitions. Word has length 31 [2021-06-05 14:15:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:03,598 INFO L482 AbstractCegarLoop]: Abstraction has 48103 states and 281352 transitions. [2021-06-05 14:15:03,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 48103 states and 281352 transitions. [2021-06-05 14:15:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:15:03,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:03,740 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:03,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 14:15:03,740 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 858374, now seen corresponding path program 1 times [2021-06-05 14:15:03,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:03,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504742553] [2021-06-05 14:15:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:03,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504742553] [2021-06-05 14:15:03,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504742553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650625090] [2021-06-05 14:15:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:15:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:03,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650625090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:03,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:03,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-05 14:15:03,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982341994] [2021-06-05 14:15:03,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:15:03,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:03,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:15:03,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:15:03,948 INFO L87 Difference]: Start difference. First operand 48103 states and 281352 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:05,052 INFO L93 Difference]: Finished difference Result 56784 states and 326793 transitions. [2021-06-05 14:15:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:15:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 31 [2021-06-05 14:15:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:05,348 INFO L225 Difference]: With dead ends: 56784 [2021-06-05 14:15:05,349 INFO L226 Difference]: Without dead ends: 56381 [2021-06-05 14:15:05,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:15:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56381 states. [2021-06-05 14:15:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56381 to 50997. [2021-06-05 14:15:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50997 states, 50996 states have (on average 5.823652835516511) internal successors, (296983), 50996 states have internal predecessors, (296983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50997 states to 50997 states and 296983 transitions. [2021-06-05 14:15:07,353 INFO L78 Accepts]: Start accepts. Automaton has 50997 states and 296983 transitions. Word has length 31 [2021-06-05 14:15:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:07,353 INFO L482 AbstractCegarLoop]: Abstraction has 50997 states and 296983 transitions. [2021-06-05 14:15:07,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 50997 states and 296983 transitions. [2021-06-05 14:15:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:15:07,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:07,514 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:07,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:15:07,717 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash 309047268, now seen corresponding path program 2 times [2021-06-05 14:15:07,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:07,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896262322] [2021-06-05 14:15:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:08,272 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-06-05 14:15:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:15:08,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896262322] [2021-06-05 14:15:08,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896262322] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:15:08,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:15:08,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:15:08,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845388356] [2021-06-05 14:15:08,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:15:08,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:15:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:15:08,302 INFO L87 Difference]: Start difference. First operand 50997 states and 296983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:08,921 INFO L93 Difference]: Finished difference Result 58483 states and 336376 transitions. [2021-06-05 14:15:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:15:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 14:15:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:09,193 INFO L225 Difference]: With dead ends: 58483 [2021-06-05 14:15:09,194 INFO L226 Difference]: Without dead ends: 58080 [2021-06-05 14:15:09,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:15:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2021-06-05 14:15:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 53054. [2021-06-05 14:15:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53054 states, 53053 states have (on average 5.811565792697868) internal successors, (308321), 53053 states have internal predecessors, (308321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53054 states to 53054 states and 308321 transitions. [2021-06-05 14:15:11,772 INFO L78 Accepts]: Start accepts. Automaton has 53054 states and 308321 transitions. Word has length 31 [2021-06-05 14:15:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:11,773 INFO L482 AbstractCegarLoop]: Abstraction has 53054 states and 308321 transitions. [2021-06-05 14:15:11,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 53054 states and 308321 transitions. [2021-06-05 14:15:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:12,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:12,033 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:12,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 14:15:12,033 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash 131288516, now seen corresponding path program 3 times [2021-06-05 14:15:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:12,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444343247] [2021-06-05 14:15:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:12,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444343247] [2021-06-05 14:15:12,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444343247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799059328] [2021-06-05 14:15:12,057 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:12,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:15:12,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:12,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799059328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:12,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:12,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:12,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184204390] [2021-06-05 14:15:12,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:12,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:12,164 INFO L87 Difference]: Start difference. First operand 53054 states and 308321 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:14,328 INFO L93 Difference]: Finished difference Result 166964 states and 963436 transitions. [2021-06-05 14:15:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:15:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:15:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:15,131 INFO L225 Difference]: With dead ends: 166964 [2021-06-05 14:15:15,131 INFO L226 Difference]: Without dead ends: 166964 [2021-06-05 14:15:15,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:15:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166964 states. [2021-06-05 14:15:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166964 to 71659. [2021-06-05 14:15:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71659 states, 71658 states have (on average 5.932080158530799) internal successors, (425081), 71658 states have internal predecessors, (425081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71659 states to 71659 states and 425081 transitions. [2021-06-05 14:15:19,722 INFO L78 Accepts]: Start accepts. Automaton has 71659 states and 425081 transitions. Word has length 33 [2021-06-05 14:15:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:19,722 INFO L482 AbstractCegarLoop]: Abstraction has 71659 states and 425081 transitions. [2021-06-05 14:15:19,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 71659 states and 425081 transitions. [2021-06-05 14:15:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:19,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:19,959 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:20,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:20,170 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1278122040, now seen corresponding path program 4 times [2021-06-05 14:15:20,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:20,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578899678] [2021-06-05 14:15:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:20,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578899678] [2021-06-05 14:15:20,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578899678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813314902] [2021-06-05 14:15:20,241 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:20,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:15:20,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:20,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813314902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:20,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:20,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776163824] [2021-06-05 14:15:20,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:20,347 INFO L87 Difference]: Start difference. First operand 71659 states and 425081 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:22,379 INFO L93 Difference]: Finished difference Result 151965 states and 880181 transitions. [2021-06-05 14:15:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:15:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:15:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:23,905 INFO L225 Difference]: With dead ends: 151965 [2021-06-05 14:15:23,905 INFO L226 Difference]: Without dead ends: 151069 [2021-06-05 14:15:23,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:15:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151069 states. [2021-06-05 14:15:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151069 to 98035. [2021-06-05 14:15:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98035 states, 98034 states have (on average 6.051471938307118) internal successors, (593250), 98034 states have internal predecessors, (593250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98035 states to 98035 states and 593250 transitions. [2021-06-05 14:15:29,776 INFO L78 Accepts]: Start accepts. Automaton has 98035 states and 593250 transitions. Word has length 33 [2021-06-05 14:15:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:29,776 INFO L482 AbstractCegarLoop]: Abstraction has 98035 states and 593250 transitions. [2021-06-05 14:15:29,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 98035 states and 593250 transitions. [2021-06-05 14:15:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:30,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:30,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:30,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:30,389 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1305965304, now seen corresponding path program 5 times [2021-06-05 14:15:30,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:30,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440107898] [2021-06-05 14:15:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:30,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:30,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440107898] [2021-06-05 14:15:30,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440107898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:30,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286609661] [2021-06-05 14:15:30,464 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:30,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:15:30,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:30,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286609661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:30,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:30,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:30,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665899085] [2021-06-05 14:15:30,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:30,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:30,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:30,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:30,662 INFO L87 Difference]: Start difference. First operand 98035 states and 593250 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:32,978 INFO L93 Difference]: Finished difference Result 145413 states and 850897 transitions. [2021-06-05 14:15:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:15:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:15:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:34,239 INFO L225 Difference]: With dead ends: 145413 [2021-06-05 14:15:34,239 INFO L226 Difference]: Without dead ends: 145413 [2021-06-05 14:15:34,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:15:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145413 states. [2021-06-05 14:15:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145413 to 96954. [2021-06-05 14:15:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96954 states, 96953 states have (on average 6.02823017338298) internal successors, (584455), 96953 states have internal predecessors, (584455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96954 states to 96954 states and 584455 transitions. [2021-06-05 14:15:39,780 INFO L78 Accepts]: Start accepts. Automaton has 96954 states and 584455 transitions. Word has length 33 [2021-06-05 14:15:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:39,780 INFO L482 AbstractCegarLoop]: Abstraction has 96954 states and 584455 transitions. [2021-06-05 14:15:39,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 96954 states and 584455 transitions. [2021-06-05 14:15:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:40,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:40,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:40,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:40,304 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1278439228, now seen corresponding path program 6 times [2021-06-05 14:15:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:40,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088149084] [2021-06-05 14:15:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:40,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:40,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088149084] [2021-06-05 14:15:40,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088149084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:40,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426501689] [2021-06-05 14:15:40,332 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:40,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:15:40,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:40,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:40,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426501689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:40,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:40,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:40,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37613344] [2021-06-05 14:15:40,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:40,447 INFO L87 Difference]: Start difference. First operand 96954 states and 584455 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:42,315 INFO L93 Difference]: Finished difference Result 133964 states and 783258 transitions. [2021-06-05 14:15:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:15:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:15:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:43,505 INFO L225 Difference]: With dead ends: 133964 [2021-06-05 14:15:43,506 INFO L226 Difference]: Without dead ends: 133804 [2021-06-05 14:15:43,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:15:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133804 states. [2021-06-05 14:15:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133804 to 97004. [2021-06-05 14:15:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97004 states, 97003 states have (on average 6.026844530581529) internal successors, (584622), 97003 states have internal predecessors, (584622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97004 states to 97004 states and 584622 transitions. [2021-06-05 14:15:48,493 INFO L78 Accepts]: Start accepts. Automaton has 97004 states and 584622 transitions. Word has length 33 [2021-06-05 14:15:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:48,493 INFO L482 AbstractCegarLoop]: Abstraction has 97004 states and 584622 transitions. [2021-06-05 14:15:48,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 97004 states and 584622 transitions. [2021-06-05 14:15:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:48,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:48,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:15:49,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:49,120 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:49,121 INFO L82 PathProgramCache]: Analyzing trace with hash 11476090, now seen corresponding path program 7 times [2021-06-05 14:15:49,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:49,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805219207] [2021-06-05 14:15:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:49,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:49,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805219207] [2021-06-05 14:15:49,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805219207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:49,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453008319] [2021-06-05 14:15:49,141 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:15:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453008319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:49,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:49,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:49,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528347858] [2021-06-05 14:15:49,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:49,246 INFO L87 Difference]: Start difference. First operand 97004 states and 584622 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:53,173 INFO L93 Difference]: Finished difference Result 227012 states and 1346306 transitions. [2021-06-05 14:15:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:15:53,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 33 [2021-06-05 14:15:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:54,490 INFO L225 Difference]: With dead ends: 227012 [2021-06-05 14:15:54,491 INFO L226 Difference]: Without dead ends: 227012 [2021-06-05 14:15:54,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:15:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227012 states. [2021-06-05 14:16:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227012 to 126089. [2021-06-05 14:16:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126089 states, 126088 states have (on average 6.168192056341603) internal successors, (777735), 126088 states have internal predecessors, (777735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126089 states to 126089 states and 777735 transitions. [2021-06-05 14:16:02,126 INFO L78 Accepts]: Start accepts. Automaton has 126089 states and 777735 transitions. Word has length 33 [2021-06-05 14:16:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:02,127 INFO L482 AbstractCegarLoop]: Abstraction has 126089 states and 777735 transitions. [2021-06-05 14:16:02,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 126089 states and 777735 transitions. [2021-06-05 14:16:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:16:02,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:02,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:02,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 14:16:02,888 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1498559738, now seen corresponding path program 8 times [2021-06-05 14:16:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:02,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120369045] [2021-06-05 14:16:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:02,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:02,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120369045] [2021-06-05 14:16:02,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120369045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:02,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397459795] [2021-06-05 14:16:02,937 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:02,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:16:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:16:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:03,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397459795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:03,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:03,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:16:03,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674648905] [2021-06-05 14:16:03,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:16:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:03,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:16:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:16:03,053 INFO L87 Difference]: Start difference. First operand 126089 states and 777735 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:05,907 INFO L93 Difference]: Finished difference Result 173970 states and 1035526 transitions. [2021-06-05 14:16:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:16:05,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:16:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:07,069 INFO L225 Difference]: With dead ends: 173970 [2021-06-05 14:16:07,069 INFO L226 Difference]: Without dead ends: 173746 [2021-06-05 14:16:07,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:16:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2021-06-05 14:16:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 125926. [2021-06-05 14:16:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125926 states, 125925 states have (on average 6.16766329164185) internal successors, (776663), 125925 states have internal predecessors, (776663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125926 states to 125926 states and 776663 transitions. [2021-06-05 14:16:14,112 INFO L78 Accepts]: Start accepts. Automaton has 125926 states and 776663 transitions. Word has length 33 [2021-06-05 14:16:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:14,147 INFO L482 AbstractCegarLoop]: Abstraction has 125926 states and 776663 transitions. [2021-06-05 14:16:14,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 125926 states and 776663 transitions. [2021-06-05 14:16:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:16:14,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:14,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:14,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 14:16:14,910 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1518077302, now seen corresponding path program 9 times [2021-06-05 14:16:14,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:14,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905364075] [2021-06-05 14:16:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:15,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:15,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905364075] [2021-06-05 14:16:15,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905364075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:15,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060122283] [2021-06-05 14:16:15,221 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:15,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:16:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:16:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:15,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060122283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:15,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:15,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:16:15,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239741926] [2021-06-05 14:16:15,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:16:15,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:16:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:16:15,664 INFO L87 Difference]: Start difference. First operand 125926 states and 776663 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:18,670 INFO L93 Difference]: Finished difference Result 199329 states and 1186134 transitions. [2021-06-05 14:16:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:16:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:16:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:20,754 INFO L225 Difference]: With dead ends: 199329 [2021-06-05 14:16:20,754 INFO L226 Difference]: Without dead ends: 199329 [2021-06-05 14:16:20,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:16:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199329 states. [2021-06-05 14:16:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199329 to 128232. [2021-06-05 14:16:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128232 states, 128231 states have (on average 6.171487393843922) internal successors, (791376), 128231 states have internal predecessors, (791376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128232 states to 128232 states and 791376 transitions. [2021-06-05 14:16:28,858 INFO L78 Accepts]: Start accepts. Automaton has 128232 states and 791376 transitions. Word has length 33 [2021-06-05 14:16:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:28,859 INFO L482 AbstractCegarLoop]: Abstraction has 128232 states and 791376 transitions. [2021-06-05 14:16:28,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 128232 states and 791376 transitions. [2021-06-05 14:16:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:16:29,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:29,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:29,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 14:16:29,693 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:29,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1545603378, now seen corresponding path program 10 times [2021-06-05 14:16:29,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:29,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968305014] [2021-06-05 14:16:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:29,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:29,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968305014] [2021-06-05 14:16:29,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968305014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:29,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797238156] [2021-06-05 14:16:29,737 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:29,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:16:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:16:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:29,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797238156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:29,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:29,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:16:29,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829903702] [2021-06-05 14:16:29,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:16:29,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:16:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:16:29,824 INFO L87 Difference]: Start difference. First operand 128232 states and 791376 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:33,091 INFO L93 Difference]: Finished difference Result 216985 states and 1280323 transitions. [2021-06-05 14:16:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:16:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:16:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:35,301 INFO L225 Difference]: With dead ends: 216985 [2021-06-05 14:16:35,301 INFO L226 Difference]: Without dead ends: 216825 [2021-06-05 14:16:35,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:16:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216825 states. [2021-06-05 14:16:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216825 to 128330. [2021-06-05 14:16:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128330 states, 128329 states have (on average 6.170133017478512) internal successors, (791807), 128329 states have internal predecessors, (791807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128330 states to 128330 states and 791807 transitions. [2021-06-05 14:16:42,483 INFO L78 Accepts]: Start accepts. Automaton has 128330 states and 791807 transitions. Word has length 33 [2021-06-05 14:16:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:42,483 INFO L482 AbstractCegarLoop]: Abstraction has 128330 states and 791807 transitions. [2021-06-05 14:16:42,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 128330 states and 791807 transitions. [2021-06-05 14:16:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:16:42,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:42,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:43,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:43,196 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash -915701574, now seen corresponding path program 11 times [2021-06-05 14:16:43,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:43,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665252471] [2021-06-05 14:16:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:43,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665252471] [2021-06-05 14:16:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665252471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310516288] [2021-06-05 14:16:43,216 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:43,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:16:43,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:16:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:43,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310516288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:43,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:43,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:16:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357966884] [2021-06-05 14:16:43,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:16:43,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:43,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:16:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:16:43,327 INFO L87 Difference]: Start difference. First operand 128330 states and 791807 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:46,475 INFO L93 Difference]: Finished difference Result 212002 states and 1272275 transitions. [2021-06-05 14:16:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:16:46,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:16:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:47,677 INFO L225 Difference]: With dead ends: 212002 [2021-06-05 14:16:47,677 INFO L226 Difference]: Without dead ends: 212002 [2021-06-05 14:16:47,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:16:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212002 states. [2021-06-05 14:16:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212002 to 140596. [2021-06-05 14:16:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140596 states, 140595 states have (on average 6.156221771755752) internal successors, (865534), 140595 states have internal predecessors, (865534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140596 states to 140596 states and 865534 transitions. [2021-06-05 14:16:54,635 INFO L78 Accepts]: Start accepts. Automaton has 140596 states and 865534 transitions. Word has length 33 [2021-06-05 14:16:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:54,635 INFO L482 AbstractCegarLoop]: Abstraction has 140596 states and 865534 transitions. [2021-06-05 14:16:54,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 140596 states and 865534 transitions. [2021-06-05 14:16:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:16:55,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:55,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:56,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 14:16:56,147 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash 42418712, now seen corresponding path program 12 times [2021-06-05 14:16:56,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:56,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121470971] [2021-06-05 14:16:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:56,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121470971] [2021-06-05 14:16:56,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121470971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:56,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700729851] [2021-06-05 14:16:56,171 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:56,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:16:56,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:16:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700729851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:56,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:56,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:16:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066734284] [2021-06-05 14:16:56,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:16:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:16:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:16:56,318 INFO L87 Difference]: Start difference. First operand 140596 states and 865534 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:58,957 INFO L93 Difference]: Finished difference Result 227249 states and 1340487 transitions. [2021-06-05 14:16:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:16:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:16:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:01,060 INFO L225 Difference]: With dead ends: 227249 [2021-06-05 14:17:01,060 INFO L226 Difference]: Without dead ends: 226769 [2021-06-05 14:17:01,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:17:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226769 states. [2021-06-05 14:17:07,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226769 to 146902. [2021-06-05 14:17:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146902 states, 146901 states have (on average 6.137010639818653) internal successors, (901533), 146901 states have internal predecessors, (901533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146902 states to 146902 states and 901533 transitions. [2021-06-05 14:17:09,593 INFO L78 Accepts]: Start accepts. Automaton has 146902 states and 901533 transitions. Word has length 33 [2021-06-05 14:17:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:09,593 INFO L482 AbstractCegarLoop]: Abstraction has 146902 states and 901533 transitions. [2021-06-05 14:17:09,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 146902 states and 901533 transitions. [2021-06-05 14:17:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:17:10,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:10,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:10,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:17:10,409 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:10,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1161517172, now seen corresponding path program 3 times [2021-06-05 14:17:10,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:10,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102206365] [2021-06-05 14:17:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:10,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102206365] [2021-06-05 14:17:10,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102206365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237714048] [2021-06-05 14:17:10,463 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:10,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:17:10,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:17:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:10,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237714048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:10,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:10,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:17:10,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664400382] [2021-06-05 14:17:10,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:17:10,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:17:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:17:10,557 INFO L87 Difference]: Start difference. First operand 146902 states and 901533 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:17,917 INFO L93 Difference]: Finished difference Result 514975 states and 3149120 transitions. [2021-06-05 14:17:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:17:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:17:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:25,976 INFO L225 Difference]: With dead ends: 514975 [2021-06-05 14:17:25,976 INFO L226 Difference]: Without dead ends: 514975 [2021-06-05 14:17:25,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:17:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514975 states. [2021-06-05 14:17:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514975 to 223496. [2021-06-05 14:17:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223496 states, 223495 states have (on average 6.274547529027495) internal successors, (1402330), 223495 states have internal predecessors, (1402330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223496 states to 223496 states and 1402330 transitions. [2021-06-05 14:17:43,126 INFO L78 Accepts]: Start accepts. Automaton has 223496 states and 1402330 transitions. Word has length 33 [2021-06-05 14:17:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 223496 states and 1402330 transitions. [2021-06-05 14:17:43,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 223496 states and 1402330 transitions. [2021-06-05 14:17:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:17:43,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:43,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:44,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:17:44,192 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1985612620, now seen corresponding path program 4 times [2021-06-05 14:17:44,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:44,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216697883] [2021-06-05 14:17:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:44,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216697883] [2021-06-05 14:17:44,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216697883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469248608] [2021-06-05 14:17:44,251 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:44,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:17:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469248608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:44,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:44,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:17:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183148374] [2021-06-05 14:17:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:17:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:17:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:17:44,540 INFO L87 Difference]: Start difference. First operand 223496 states and 1402330 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:51,581 INFO L93 Difference]: Finished difference Result 462426 states and 2827177 transitions. [2021-06-05 14:17:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:17:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:17:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:57,030 INFO L225 Difference]: With dead ends: 462426 [2021-06-05 14:17:57,031 INFO L226 Difference]: Without dead ends: 461530 [2021-06-05 14:17:57,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461530 states. [2021-06-05 14:18:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461530 to 306370. [2021-06-05 14:18:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306370 states, 306369 states have (on average 6.378080027679041) internal successors, (1954046), 306369 states have internal predecessors, (1954046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306370 states to 306370 states and 1954046 transitions. [2021-06-05 14:18:15,390 INFO L78 Accepts]: Start accepts. Automaton has 306370 states and 1954046 transitions. Word has length 33 [2021-06-05 14:18:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:15,390 INFO L482 AbstractCegarLoop]: Abstraction has 306370 states and 1954046 transitions. [2021-06-05 14:18:15,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 306370 states and 1954046 transitions. [2021-06-05 14:18:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:18:17,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:17,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:18,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:18,199 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1914397464, now seen corresponding path program 5 times [2021-06-05 14:18:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:18,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050177059] [2021-06-05 14:18:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:18,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050177059] [2021-06-05 14:18:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050177059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817292219] [2021-06-05 14:18:18,236 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:18,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:18:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:18,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:18:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817292219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:18,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:18,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-06-05 14:18:18,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584479606] [2021-06-05 14:18:18,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:18:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:18:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:18:18,423 INFO L87 Difference]: Start difference. First operand 306370 states and 1954046 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:25,850 INFO L93 Difference]: Finished difference Result 461475 states and 2840923 transitions. [2021-06-05 14:18:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:18:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:18:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:30,358 INFO L225 Difference]: With dead ends: 461475 [2021-06-05 14:18:30,358 INFO L226 Difference]: Without dead ends: 461475 [2021-06-05 14:18:30,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:18:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461475 states. [2021-06-05 14:18:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461475 to 301660. [2021-06-05 14:18:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301660 states, 301659 states have (on average 6.34969949512529) internal successors, (1915444), 301659 states have internal predecessors, (1915444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301660 states to 301660 states and 1915444 transitions. [2021-06-05 14:18:50,451 INFO L78 Accepts]: Start accepts. Automaton has 301660 states and 1915444 transitions. Word has length 33 [2021-06-05 14:18:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:50,451 INFO L482 AbstractCegarLoop]: Abstraction has 301660 states and 1915444 transitions. [2021-06-05 14:18:50,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 301660 states and 1915444 transitions. [2021-06-05 14:18:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:18:51,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:51,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:52,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:52,149 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash 947681444, now seen corresponding path program 6 times [2021-06-05 14:18:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298922528] [2021-06-05 14:18:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:52,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:52,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298922528] [2021-06-05 14:18:52,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298922528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:52,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139390658] [2021-06-05 14:18:52,276 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:52,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:18:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:18:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:52,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139390658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:52,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:52,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-06-05 14:18:52,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873798720] [2021-06-05 14:18:52,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:18:52,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:52,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:18:52,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:18:52,404 INFO L87 Difference]: Start difference. First operand 301660 states and 1915444 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:58,584 INFO L93 Difference]: Finished difference Result 410582 states and 2520049 transitions. [2021-06-05 14:18:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:18:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:02,837 INFO L225 Difference]: With dead ends: 410582 [2021-06-05 14:19:02,837 INFO L226 Difference]: Without dead ends: 410350 [2021-06-05 14:19:02,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:19:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410350 states. [2021-06-05 14:19:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410350 to 302246. [2021-06-05 14:19:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302246 states, 302245 states have (on average 6.348105014144155) internal successors, (1918683), 302245 states have internal predecessors, (1918683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302246 states to 302246 states and 1918683 transitions. [2021-06-05 14:19:18,744 INFO L78 Accepts]: Start accepts. Automaton has 302246 states and 1918683 transitions. Word has length 33 [2021-06-05 14:19:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:18,745 INFO L482 AbstractCegarLoop]: Abstraction has 302246 states and 1918683 transitions. [2021-06-05 14:19:18,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 302246 states and 1918683 transitions. [2021-06-05 14:19:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:19:20,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:20,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:20,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 14:19:20,793 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:19:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1649224646, now seen corresponding path program 7 times [2021-06-05 14:19:20,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:20,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171229094] [2021-06-05 14:19:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:19:20,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171229094] [2021-06-05 14:19:20,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171229094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492000260] [2021-06-05 14:19:20,809 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:19:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492000260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:20,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:20,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-06-05 14:19:20,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328663567] [2021-06-05 14:19:20,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:19:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:20,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:19:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:19:20,896 INFO L87 Difference]: Start difference. First operand 302246 states and 1918683 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:27,673 INFO L93 Difference]: Finished difference Result 543501 states and 3319923 transitions. [2021-06-05 14:19:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:19:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:19:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:33,412 INFO L225 Difference]: With dead ends: 543501 [2021-06-05 14:19:33,413 INFO L226 Difference]: Without dead ends: 543501 [2021-06-05 14:19:33,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:19:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543501 states. [2021-06-05 14:19:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543501 to 302246. [2021-06-05 14:19:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302246 states, 302245 states have (on average 6.332521629803636) internal successors, (1913973), 302245 states have internal predecessors, (1913973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302246 states to 302246 states and 1913973 transitions. [2021-06-05 14:19:56,814 INFO L78 Accepts]: Start accepts. Automaton has 302246 states and 1913973 transitions. Word has length 33 [2021-06-05 14:19:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:56,814 INFO L482 AbstractCegarLoop]: Abstraction has 302246 states and 1913973 transitions. [2021-06-05 14:19:56,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 302246 states and 1913973 transitions. [2021-06-05 14:19:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:19:58,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:58,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 14:19:58,301 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:19:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1887188038, now seen corresponding path program 8 times [2021-06-05 14:19:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:58,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994609053] [2021-06-05 14:19:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:19:58,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:58,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994609053] [2021-06-05 14:19:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994609053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:58,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133842158] [2021-06-05 14:19:58,321 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:58,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:19:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:58,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133842158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:58,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:58,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-06-05 14:19:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867850181] [2021-06-05 14:19:58,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:19:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:19:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:19:58,425 INFO L87 Difference]: Start difference. First operand 302246 states and 1913973 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:04,608 INFO L93 Difference]: Finished difference Result 447767 states and 2726927 transitions. [2021-06-05 14:20:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:20:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 33 [2021-06-05 14:20:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:09,812 INFO L225 Difference]: With dead ends: 447767 [2021-06-05 14:20:09,812 INFO L226 Difference]: Without dead ends: 447543 [2021-06-05 14:20:09,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:20:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447543 states. [2021-06-05 14:20:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447543 to 293050. [2021-06-05 14:20:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293050 states, 293049 states have (on average 6.319526768560889) internal successors, (1851931), 293049 states have internal predecessors, (1851931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293050 states to 293050 states and 1851931 transitions. [2021-06-05 14:20:29,244 INFO L78 Accepts]: Start accepts. Automaton has 293050 states and 1851931 transitions. Word has length 33 [2021-06-05 14:20:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:29,244 INFO L482 AbstractCegarLoop]: Abstraction has 293050 states and 1851931 transitions. [2021-06-05 14:20:29,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 293050 states and 1851931 transitions. [2021-06-05 14:20:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:20:31,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:31,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:31,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:31,281 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:20:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash -314293450, now seen corresponding path program 9 times [2021-06-05 14:20:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:31,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673234379] [2021-06-05 14:20:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:20:31,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:31,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673234379] [2021-06-05 14:20:31,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673234379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:31,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881667497] [2021-06-05 14:20:31,296 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:31,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:20:31,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:20:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881667497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:31,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:31,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-06-05 14:20:31,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70771688] [2021-06-05 14:20:31,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:20:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:20:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:20:31,398 INFO L87 Difference]: Start difference. First operand 293050 states and 1851931 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:39,464 INFO L93 Difference]: Finished difference Result 554308 states and 3389253 transitions. [2021-06-05 14:20:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:20:39,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:20:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:46,857 INFO L225 Difference]: With dead ends: 554308 [2021-06-05 14:20:46,857 INFO L226 Difference]: Without dead ends: 554308 [2021-06-05 14:20:46,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:20:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554308 states. [2021-06-05 14:21:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554308 to 297760. [2021-06-05 14:21:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297760 states, 297759 states have (on average 6.317568906397455) internal successors, (1881113), 297759 states have internal predecessors, (1881113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297760 states to 297760 states and 1881113 transitions. [2021-06-05 14:21:07,651 INFO L78 Accepts]: Start accepts. Automaton has 297760 states and 1881113 transitions. Word has length 33 [2021-06-05 14:21:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:07,651 INFO L482 AbstractCegarLoop]: Abstraction has 297760 states and 1881113 transitions. [2021-06-05 14:21:07,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 297760 states and 1881113 transitions. [2021-06-05 14:21:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:21:09,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:09,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:21:09,389 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:21:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1747181838, now seen corresponding path program 10 times [2021-06-05 14:21:09,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:09,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652015268] [2021-06-05 14:21:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:21:09,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:09,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652015268] [2021-06-05 14:21:09,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652015268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:09,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90442882] [2021-06-05 14:21:09,429 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:09,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:21:09,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:09,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:21:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90442882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:09,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:09,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-06-05 14:21:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994417891] [2021-06-05 14:21:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:21:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:09,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:21:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:21:09,525 INFO L87 Difference]: Start difference. First operand 297760 states and 1881113 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:15,948 INFO L93 Difference]: Finished difference Result 498176 states and 3017840 transitions. [2021-06-05 14:21:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:21:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:21:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:22,104 INFO L225 Difference]: With dead ends: 498176 [2021-06-05 14:21:22,105 INFO L226 Difference]: Without dead ends: 497944 [2021-06-05 14:21:22,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:21:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497944 states. [2021-06-05 14:21:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497944 to 297760. [2021-06-05 14:21:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297760 states, 297759 states have (on average 6.317192763274997) internal successors, (1881001), 297759 states have internal predecessors, (1881001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297760 states to 297760 states and 1881001 transitions. [2021-06-05 14:21:41,024 INFO L78 Accepts]: Start accepts. Automaton has 297760 states and 1881001 transitions. Word has length 33 [2021-06-05 14:21:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:41,024 INFO L482 AbstractCegarLoop]: Abstraction has 297760 states and 1881001 transitions. [2021-06-05 14:21:41,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 297760 states and 1881001 transitions. [2021-06-05 14:21:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:21:42,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:42,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:42,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:42,447 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:21:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2074346390, now seen corresponding path program 11 times [2021-06-05 14:21:42,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:42,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855811948] [2021-06-05 14:21:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:42,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:42,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855811948] [2021-06-05 14:21:42,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855811948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:42,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729997652] [2021-06-05 14:21:42,465 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:42,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:21:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:21:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:42,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729997652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:42,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:42,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:21:42,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302582505] [2021-06-05 14:21:42,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:21:42,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:21:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:21:42,546 INFO L87 Difference]: Start difference. First operand 297760 states and 1881001 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:49,294 INFO L93 Difference]: Finished difference Result 518884 states and 3204697 transitions. [2021-06-05 14:21:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:21:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:21:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:54,929 INFO L225 Difference]: With dead ends: 518884 [2021-06-05 14:21:54,929 INFO L226 Difference]: Without dead ends: 518884 [2021-06-05 14:21:54,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:21:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518884 states. [2021-06-05 14:22:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518884 to 324337. [2021-06-05 14:22:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324337 states, 324336 states have (on average 6.269399634946475) internal successors, (2033392), 324336 states have internal predecessors, (2033392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324337 states to 324337 states and 2033392 transitions. [2021-06-05 14:22:15,420 INFO L78 Accepts]: Start accepts. Automaton has 324337 states and 2033392 transitions. Word has length 33 [2021-06-05 14:22:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:15,420 INFO L482 AbstractCegarLoop]: Abstraction has 324337 states and 2033392 transitions. [2021-06-05 14:22:15,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 324337 states and 2033392 transitions. [2021-06-05 14:22:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:22:17,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:17,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:17,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:22:17,518 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:22:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash 365246792, now seen corresponding path program 12 times [2021-06-05 14:22:17,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:17,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937973272] [2021-06-05 14:22:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:17,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:17,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937973272] [2021-06-05 14:22:17,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937973272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:17,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063795593] [2021-06-05 14:22:17,537 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:17,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:22:17,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:17,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:22:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:17,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063795593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:17,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:17,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:22:17,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429364178] [2021-06-05 14:22:17,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:22:17,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:17,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:22:17,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:17,665 INFO L87 Difference]: Start difference. First operand 324337 states and 2033392 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,877 INFO L93 Difference]: Finished difference Result 506455 states and 3046908 transitions. [2021-06-05 14:22:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:22:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:22:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:30,423 INFO L225 Difference]: With dead ends: 506455 [2021-06-05 14:22:30,423 INFO L226 Difference]: Without dead ends: 505759 [2021-06-05 14:22:30,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:22:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505759 states. [2021-06-05 14:22:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505759 to 342540. [2021-06-05 14:22:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342540 states, 342539 states have (on average 6.238892505670887) internal successors, (2137064), 342539 states have internal predecessors, (2137064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342540 states to 342540 states and 2137064 transitions. [2021-06-05 14:22:48,883 INFO L78 Accepts]: Start accepts. Automaton has 342540 states and 2137064 transitions. Word has length 33 [2021-06-05 14:22:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:48,883 INFO L482 AbstractCegarLoop]: Abstraction has 342540 states and 2137064 transitions. [2021-06-05 14:22:48,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 342540 states and 2137064 transitions. [2021-06-05 14:22:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:22:50,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:50,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:50,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 14:22:50,973 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:22:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 19316104, now seen corresponding path program 3 times [2021-06-05 14:22:50,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:50,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566254963] [2021-06-05 14:22:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:50,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:50,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566254963] [2021-06-05 14:22:50,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566254963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:50,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716009788] [2021-06-05 14:22:50,992 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:51,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:51,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:22:51,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:51,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716009788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:51,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:51,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:22:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655585882] [2021-06-05 14:22:51,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:22:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:22:51,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:51,075 INFO L87 Difference]: Start difference. First operand 342540 states and 2137064 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:07,522 INFO L93 Difference]: Finished difference Result 1112189 states and 6906603 transitions. [2021-06-05 14:23:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:23:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:18,029 INFO L225 Difference]: With dead ends: 1112189 [2021-06-05 14:23:18,030 INFO L226 Difference]: Without dead ends: 1112189 [2021-06-05 14:23:18,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:23:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112189 states. [2021-06-05 14:23:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112189 to 536964. [2021-06-05 14:23:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536964 states, 536963 states have (on average 6.3524097563519275) internal successors, (3411009), 536963 states have internal predecessors, (3411009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536964 states to 536964 states and 3411009 transitions. [2021-06-05 14:23:59,132 INFO L78 Accepts]: Start accepts. Automaton has 536964 states and 3411009 transitions. Word has length 33 [2021-06-05 14:23:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:59,133 INFO L482 AbstractCegarLoop]: Abstraction has 536964 states and 3411009 transitions. [2021-06-05 14:23:59,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 536964 states and 3411009 transitions. Received shutdown request... [2021-06-05 14:24:01,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 14:24:01,448 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:24:01,449 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:24:01,451 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:24:01,451 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:24:01 BasicIcfg [2021-06-05 14:24:01,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:24:01,463 INFO L168 Benchmark]: Toolchain (without parser) took 576752.61 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.4 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 10.4 GB. Max. memory is 16.0 GB. [2021-06-05 14:24:01,463 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 360.7 MB. Free memory is still 340.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:24:01,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.98 ms. Allocated memory is still 360.7 MB. Free memory was 339.4 MB in the beginning and 337.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:24:01,463 INFO L168 Benchmark]: Boogie Preprocessor took 13.31 ms. Allocated memory is still 360.7 MB. Free memory was 337.9 MB in the beginning and 336.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:24:01,463 INFO L168 Benchmark]: RCFGBuilder took 178.23 ms. Allocated memory is still 360.7 MB. Free memory was 336.8 MB in the beginning and 323.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:24:01,463 INFO L168 Benchmark]: TraceAbstraction took 576537.00 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 323.5 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 10.4 GB. Max. memory is 16.0 GB. [2021-06-05 14:24:01,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 360.7 MB. Free memory is still 340.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.98 ms. Allocated memory is still 360.7 MB. Free memory was 339.4 MB in the beginning and 337.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.31 ms. Allocated memory is still 360.7 MB. Free memory was 337.9 MB in the beginning and 336.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 178.23 ms. Allocated memory is still 360.7 MB. Free memory was 336.8 MB in the beginning and 323.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 576537.00 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 323.5 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 10.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 536964 states). - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 536964 states). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 536964 states). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 536964 states). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 536964 states). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while IsEmpty was searching accepting run (input had 536964 states). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while IsEmpty was searching accepting run (input had 536964 states). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 72 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 576417.2ms, OverallIterations: 39, TraceHistogramMax: 2, EmptinessCheckTime: 26757.6ms, AutomataDifference: 210169.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 396.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3298 SDtfs, 7500 SDslu, 8332 SDs, 0 SdLazy, 7456 SolverSat, 270 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6788.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 817 SyntacticMatches, 40 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2511.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=536964occurred in iteration=39, InterpolantAutomatonStates: 372, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 326750.1ms AutomataMinimizationTime, 39 MinimizatonAttempts, 3356193 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 257.5ms SsaConstructionTime, 631.8ms SatisfiabilityAnalysisTime, 4649.0ms InterpolantComputationTime, 2098 NumberOfCodeBlocks, 2098 NumberOfCodeBlocksAsserted, 96 NumberOfCheckSat, 2032 ConstructedInterpolants, 0 QuantifiedInterpolants, 8707 SizeOfPredicates, 84 NumberOfNonLiveVariables, 3159 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 66 InterpolantComputations, 12 PerfectInterpolantSequences, 122/242 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !SESSION 2021-06-05 14:14:23.178 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-06-05 14:24:01.718 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5fcdeb77/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5fcdeb77/.metadata/.log.