/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:18:53,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:18:53,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:18:53,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 19:18:53,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 19:18:53,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 19:18:53,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 19:18:53,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 19:18:53,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 19:18:53,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 19:18:53,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 19:18:53,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 19:18:53,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 19:18:53,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 19:18:53,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 19:18:53,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 19:18:53,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 19:18:53,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 19:18:53,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 19:18:53,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 19:18:53,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 19:18:53,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 19:18:53,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 19:18:53,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 19:18:53,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-12 19:18:53,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-12 19:18:53,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-12 19:18:53,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-12 19:18:53,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-12 19:18:53,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-12 19:18:53,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 19:18:53,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 19:18:53,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 19:18:53,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 19:18:53,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 19:18:53,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 19:18:53,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 19:18:53,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-12 19:18:53,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 19:18:53,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 19:18:53,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 19:18:53,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:18:53,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:18:53,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:18:53,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:18:53,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:18:53,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:18:53,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:18:53,646 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:18:53,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:18:53,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:18:53,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:18:53,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:18:53,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:18:53,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:18:53,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:18:53,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:18:53,648 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:18:53,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:18:53,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:18:53,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:18:53,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:18:53,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:18:53,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:18:53,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:18:53,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:18:53,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:18:53,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:18:53,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:18:53,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:18:53,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:18:53,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:18:53,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:18:53,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:18:53,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:18:53,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:18:53,974 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:18:53,975 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:18:53,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-08-12 19:18:53,976 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-08-12 19:18:54,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:18:54,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:18:54,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:18:54,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:18:54,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:18:54,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:18:54,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:18:54,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:18:54,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:18:54,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/1) ... [2021-08-12 19:18:54,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:18:54,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:18:54,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:18:54,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:18:54,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (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 [2021-08-12 19:18:54,150 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:18:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:18:54,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:18:54,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:18:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:18:54,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:18:54,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:18:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:18:54,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:18:54,152 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:18:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:18:54,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:18:54,152 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 19:18:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 19:18:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 19:18:54,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-12 19:18:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-12 19:18:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-12 19:18:54,154 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:18:54,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:18:54,377 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:18:54,379 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:18:54 BoogieIcfgContainer [2021-08-12 19:18:54,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:18:54,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:18:54,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:18:54,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:18:54,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:18:54" (1/2) ... [2021-08-12 19:18:54,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bb5f41 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:18:54, skipping insertion in model container [2021-08-12 19:18:54,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:18:54" (2/2) ... [2021-08-12 19:18:54,401 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-08-12 19:18:54,406 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:18:54,406 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:18:54,407 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:18:54,487 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-08-12 19:18:54,507 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-12 19:18:54,539 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:18:54,539 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:18:54,539 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:18:54,539 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:18:54,539 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:18:54,540 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:18:54,540 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:18:54,540 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:18:54,554 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-08-12 19:18:55,052 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:18:55,192 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:55,193 INFO L550 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] [2021-08-12 19:18:55,194 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:18:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-08-12 19:18:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:55,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773348176] [2021-08-12 19:18:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773348176] [2021-08-12 19:18:55,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773348176] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:18:55,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:18:55,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:18:55,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849175206] [2021-08-12 19:18:55,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:18:55,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:55,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:18:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:18:55,382 INFO L87 Difference]: Start difference. First operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:56,414 INFO L93 Difference]: Finished difference Result 23175 states and 106654 transitions. [2021-08-12 19:18:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:18:56,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:18:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:56,589 INFO L225 Difference]: With dead ends: 23175 [2021-08-12 19:18:56,589 INFO L226 Difference]: Without dead ends: 15763 [2021-08-12 19:18:56,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:18:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-08-12 19:18:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-08-12 19:18:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-08-12 19:18:57,344 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-08-12 19:18:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:57,345 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-08-12 19:18:57,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-08-12 19:18:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:18:57,489 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:57,489 INFO L550 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] [2021-08-12 19:18:57,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:18:57,490 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:18:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-08-12 19:18:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:57,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990884052] [2021-08-12 19:18:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:57,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:57,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990884052] [2021-08-12 19:18:57,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990884052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:18:57,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:18:57,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:18:57,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186822336] [2021-08-12 19:18:57,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:18:57,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:18:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:18:57,532 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:57,805 INFO L93 Difference]: Finished difference Result 9448 states and 43400 transitions. [2021-08-12 19:18:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:18:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:18:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:57,858 INFO L225 Difference]: With dead ends: 9448 [2021-08-12 19:18:57,858 INFO L226 Difference]: Without dead ends: 6583 [2021-08-12 19:18:57,867 INFO L806 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 [2021-08-12 19:18:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-08-12 19:18:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-08-12 19:18:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-08-12 19:18:58,192 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-08-12 19:18:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:58,194 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-08-12 19:18:58,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-08-12 19:18:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:18:58,218 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:58,218 INFO L550 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] [2021-08-12 19:18:58,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:18:58,219 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:18:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-08-12 19:18:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:58,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562109000] [2021-08-12 19:18:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:58,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:58,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562109000] [2021-08-12 19:18:58,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562109000] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:18:58,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:18:58,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:18:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130431777] [2021-08-12 19:18:58,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:18:58,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:18:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:18:58,290 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:59,031 INFO L93 Difference]: Finished difference Result 22803 states and 103823 transitions. [2021-08-12 19:18:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:18:59,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:18:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:59,146 INFO L225 Difference]: With dead ends: 22803 [2021-08-12 19:18:59,151 INFO L226 Difference]: Without dead ends: 16593 [2021-08-12 19:18:59,172 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:18:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-08-12 19:18:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-08-12 19:18:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-08-12 19:18:59,640 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-08-12 19:18:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:59,640 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-08-12 19:18:59,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-08-12 19:18:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:18:59,668 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:59,668 INFO L550 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] [2021-08-12 19:18:59,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:18:59,668 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:18:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-08-12 19:18:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:59,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630424409] [2021-08-12 19:18:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:59,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:59,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630424409] [2021-08-12 19:18:59,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630424409] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:18:59,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:18:59,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:18:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798750885] [2021-08-12 19:18:59,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:18:59,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:18:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:18:59,698 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:00,025 INFO L93 Difference]: Finished difference Result 8426 states and 38334 transitions. [2021-08-12 19:19:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:00,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:19:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:00,078 INFO L225 Difference]: With dead ends: 8426 [2021-08-12 19:19:00,078 INFO L226 Difference]: Without dead ends: 6361 [2021-08-12 19:19:00,084 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-08-12 19:19:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-08-12 19:19:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-08-12 19:19:00,361 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-08-12 19:19:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:00,362 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-08-12 19:19:00,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-08-12 19:19:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:00,386 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:00,386 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:00,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:19:00,387 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-08-12 19:19:00,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:00,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934069903] [2021-08-12 19:19:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:00,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934069903] [2021-08-12 19:19:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934069903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118041837] [2021-08-12 19:19:00,460 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 [2021-08-12 19:19:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:19:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:00,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118041837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:00,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:00,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-12 19:19:00,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614663715] [2021-08-12 19:19:00,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:19:00,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:00,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:19:00,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:19:00,762 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:01,397 INFO L93 Difference]: Finished difference Result 16158 states and 73275 transitions. [2021-08-12 19:19:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:19:01,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:01,490 INFO L225 Difference]: With dead ends: 16158 [2021-08-12 19:19:01,490 INFO L226 Difference]: Without dead ends: 13742 [2021-08-12 19:19:01,504 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:19:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-08-12 19:19:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-08-12 19:19:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-08-12 19:19:01,978 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-08-12 19:19:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:01,978 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-08-12 19:19:01,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-08-12 19:19:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:02,013 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:02,013 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:02,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:02,237 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-08-12 19:19:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:02,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137373802] [2021-08-12 19:19:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:02,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:02,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137373802] [2021-08-12 19:19:02,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137373802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:02,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538253518] [2021-08-12 19:19:02,339 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 [2021-08-12 19:19:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:19:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:02,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538253518] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:02,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:19:02,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-12 19:19:02,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095752100] [2021-08-12 19:19:02,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:02,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:02,466 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:03,101 INFO L93 Difference]: Finished difference Result 13080 states and 59487 transitions. [2021-08-12 19:19:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:03,167 INFO L225 Difference]: With dead ends: 13080 [2021-08-12 19:19:03,167 INFO L226 Difference]: Without dead ends: 11118 [2021-08-12 19:19:03,176 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-08-12 19:19:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-08-12 19:19:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-08-12 19:19:03,553 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-08-12 19:19:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:03,553 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-08-12 19:19:03,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-08-12 19:19:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:03,577 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:03,577 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:03,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:03,800 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-08-12 19:19:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:03,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420943485] [2021-08-12 19:19:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:03,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:03,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420943485] [2021-08-12 19:19:03,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420943485] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:03,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:03,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:19:03,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086228372] [2021-08-12 19:19:03,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:03,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:03,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:03,831 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:04,469 INFO L93 Difference]: Finished difference Result 18762 states and 84826 transitions. [2021-08-12 19:19:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:04,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:04,556 INFO L225 Difference]: With dead ends: 18762 [2021-08-12 19:19:04,556 INFO L226 Difference]: Without dead ends: 15386 [2021-08-12 19:19:04,572 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-08-12 19:19:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-08-12 19:19:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-08-12 19:19:05,154 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-08-12 19:19:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:05,154 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-08-12 19:19:05,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-08-12 19:19:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:05,183 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:05,183 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:05,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:19:05,184 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-08-12 19:19:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:05,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071867349] [2021-08-12 19:19:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:05,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071867349] [2021-08-12 19:19:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071867349] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:05,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:05,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:19:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671862404] [2021-08-12 19:19:05,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:05,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:05,225 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:06,026 INFO L93 Difference]: Finished difference Result 27311 states and 122935 transitions. [2021-08-12 19:19:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:06,122 INFO L225 Difference]: With dead ends: 27311 [2021-08-12 19:19:06,122 INFO L226 Difference]: Without dead ends: 22667 [2021-08-12 19:19:06,140 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-08-12 19:19:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-08-12 19:19:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-08-12 19:19:06,810 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-08-12 19:19:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:06,811 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-08-12 19:19:06,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-08-12 19:19:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:06,847 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:06,847 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:06,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 19:19:06,848 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-08-12 19:19:06,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:06,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623709988] [2021-08-12 19:19:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623709988] [2021-08-12 19:19:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623709988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558334275] [2021-08-12 19:19:06,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:06,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:06,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:19:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:07,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558334275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:07,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:07,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-08-12 19:19:07,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305319581] [2021-08-12 19:19:07,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:19:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:19:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:07,042 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:10,632 INFO L93 Difference]: Finished difference Result 67481 states and 297691 transitions. [2021-08-12 19:19:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:19:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:11,036 INFO L225 Difference]: With dead ends: 67481 [2021-08-12 19:19:11,048 INFO L226 Difference]: Without dead ends: 50671 [2021-08-12 19:19:11,110 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:19:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-08-12 19:19:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-08-12 19:19:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-08-12 19:19:12,515 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-08-12 19:19:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:12,516 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-08-12 19:19:12,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-08-12 19:19:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:12,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:12,561 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:12,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:12,775 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-08-12 19:19:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:12,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463654899] [2021-08-12 19:19:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:12,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:12,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463654899] [2021-08-12 19:19:12,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463654899] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:12,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:12,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:19:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700459369] [2021-08-12 19:19:12,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:12,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:12,796 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:14,295 INFO L93 Difference]: Finished difference Result 28584 states and 128672 transitions. [2021-08-12 19:19:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:14,423 INFO L225 Difference]: With dead ends: 28584 [2021-08-12 19:19:14,423 INFO L226 Difference]: Without dead ends: 26834 [2021-08-12 19:19:14,432 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-08-12 19:19:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-08-12 19:19:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-08-12 19:19:15,462 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-08-12 19:19:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:15,462 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-08-12 19:19:15,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-08-12 19:19:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:15,522 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:15,522 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:15,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 19:19:15,522 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:15,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1747092604, now seen corresponding path program 2 times [2021-08-12 19:19:15,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:15,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697512845] [2021-08-12 19:19:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:15,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:15,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697512845] [2021-08-12 19:19:15,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697512845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:15,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:15,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:19:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413401185] [2021-08-12 19:19:15,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:15,547 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:16,972 INFO L93 Difference]: Finished difference Result 28976 states and 128168 transitions. [2021-08-12 19:19:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:19:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:17,095 INFO L225 Difference]: With dead ends: 28976 [2021-08-12 19:19:17,095 INFO L226 Difference]: Without dead ends: 24325 [2021-08-12 19:19:17,107 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-08-12 19:19:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-08-12 19:19:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-08-12 19:19:18,087 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-08-12 19:19:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:18,088 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-08-12 19:19:18,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-08-12 19:19:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:18,127 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:18,127 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:18,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 19:19:18,128 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:18,128 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-08-12 19:19:18,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:18,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587945985] [2021-08-12 19:19:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:18,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:18,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587945985] [2021-08-12 19:19:18,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587945985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:18,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026943285] [2021-08-12 19:19:18,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:18,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:19:18,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:18,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:19:18,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026943285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:18,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:18,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-08-12 19:19:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551807269] [2021-08-12 19:19:18,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:19:18,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:19:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:18,477 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:23,207 INFO L93 Difference]: Finished difference Result 69461 states and 306008 transitions. [2021-08-12 19:19:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:19:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:23,379 INFO L225 Difference]: With dead ends: 69461 [2021-08-12 19:19:23,379 INFO L226 Difference]: Without dead ends: 35063 [2021-08-12 19:19:23,422 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:19:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-08-12 19:19:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-08-12 19:19:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19352 states, 19351 states have (on average 4.504315022479458) internal successors, (87163), 19351 states have internal predecessors, (87163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-08-12 19:19:24,727 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-08-12 19:19:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:24,727 INFO L482 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-08-12 19:19:24,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-08-12 19:19:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:24,767 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:24,767 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:24,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:24,968 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-08-12 19:19:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:24,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904718464] [2021-08-12 19:19:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:24,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904718464] [2021-08-12 19:19:24,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904718464] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:24,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:24,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:19:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943487004] [2021-08-12 19:19:24,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:24,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:24,999 INFO L87 Difference]: Start difference. First operand 19352 states and 87163 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:26,417 INFO L93 Difference]: Finished difference Result 24540 states and 108300 transitions. [2021-08-12 19:19:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:26,528 INFO L225 Difference]: With dead ends: 24540 [2021-08-12 19:19:26,529 INFO L226 Difference]: Without dead ends: 19957 [2021-08-12 19:19:26,539 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-08-12 19:19:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-08-12 19:19:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 4.485086602844336) internal successors, (81050), 18071 states have internal predecessors, (81050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-08-12 19:19:27,406 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-08-12 19:19:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:27,406 INFO L482 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-08-12 19:19:27,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-08-12 19:19:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:27,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:27,447 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:27,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-12 19:19:27,448 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-08-12 19:19:27,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:27,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32817632] [2021-08-12 19:19:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:27,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:27,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32817632] [2021-08-12 19:19:27,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32817632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:27,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:27,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:19:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629094740] [2021-08-12 19:19:27,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:19:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:19:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:27,480 INFO L87 Difference]: Start difference. First operand 18072 states and 81050 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:28,921 INFO L93 Difference]: Finished difference Result 26532 states and 114992 transitions. [2021-08-12 19:19:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:19:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:29,023 INFO L225 Difference]: With dead ends: 26532 [2021-08-12 19:19:29,024 INFO L226 Difference]: Without dead ends: 20403 [2021-08-12 19:19:29,035 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:19:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-08-12 19:19:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-08-12 19:19:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 18469 states have (on average 4.4772321186853645) internal successors, (82690), 18469 states have internal predecessors, (82690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-08-12 19:19:29,914 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-08-12 19:19:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:29,914 INFO L482 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-08-12 19:19:29,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-08-12 19:19:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:19:29,949 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:29,949 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:29,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 19:19:29,950 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-08-12 19:19:29,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:29,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000158843] [2021-08-12 19:19:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:30,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:30,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000158843] [2021-08-12 19:19:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000158843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:30,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576408161] [2021-08-12 19:19:30,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:30,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:19:30,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:19:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:30,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576408161] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:30,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:19:30,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-12 19:19:30,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484034451] [2021-08-12 19:19:30,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:30,152 INFO L87 Difference]: Start difference. First operand 18470 states and 82690 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:31,524 INFO L93 Difference]: Finished difference Result 22275 states and 98881 transitions. [2021-08-12 19:19:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:19:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:31,636 INFO L225 Difference]: With dead ends: 22275 [2021-08-12 19:19:31,636 INFO L226 Difference]: Without dead ends: 18640 [2021-08-12 19:19:31,649 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-08-12 19:19:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-08-12 19:19:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13099 states, 13098 states have (on average 4.455183997556879) internal successors, (58354), 13098 states have internal predecessors, (58354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-08-12 19:19:32,299 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-08-12 19:19:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:32,300 INFO L482 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-08-12 19:19:32,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-08-12 19:19:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:19:32,327 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:32,327 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:32,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:19:32,528 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-08-12 19:19:32,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:32,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695003192] [2021-08-12 19:19:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:19:32,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:32,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695003192] [2021-08-12 19:19:32,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695003192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:32,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577062594] [2021-08-12 19:19:32,584 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 [2021-08-12 19:19:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:19:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:32,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577062594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:32,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:32,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-08-12 19:19:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395878848] [2021-08-12 19:19:32,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:19:32,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:19:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:32,678 INFO L87 Difference]: Start difference. First operand 13099 states and 58354 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:36,894 INFO L93 Difference]: Finished difference Result 44885 states and 205527 transitions. [2021-08-12 19:19:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:19:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:19:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:37,026 INFO L225 Difference]: With dead ends: 44885 [2021-08-12 19:19:37,026 INFO L226 Difference]: Without dead ends: 24373 [2021-08-12 19:19:37,057 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:19:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-08-12 19:19:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-08-12 19:19:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 4.517816028944194) internal successors, (41207), 9121 states have internal predecessors, (41207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-08-12 19:19:37,857 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-08-12 19:19:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:37,857 INFO L482 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-08-12 19:19:37,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-08-12 19:19:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:19:37,875 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:37,875 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:38,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:38,076 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:38,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-08-12 19:19:38,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:38,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043725103] [2021-08-12 19:19:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:19:38,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:38,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043725103] [2021-08-12 19:19:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043725103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068247342] [2021-08-12 19:19:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:38,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:19:38,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:38,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068247342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:38,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:38,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-08-12 19:19:38,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727069902] [2021-08-12 19:19:38,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:19:38,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:38,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:19:38,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:38,329 INFO L87 Difference]: Start difference. First operand 9122 states and 41207 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:42,543 INFO L93 Difference]: Finished difference Result 35635 states and 165290 transitions. [2021-08-12 19:19:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 19:19:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 19:19:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:42,663 INFO L225 Difference]: With dead ends: 35635 [2021-08-12 19:19:42,664 INFO L226 Difference]: Without dead ends: 23102 [2021-08-12 19:19:42,683 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 622.5ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:19:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-08-12 19:19:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-08-12 19:19:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.515595226155852) internal successors, (45025), 9971 states have internal predecessors, (45025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-08-12 19:19:43,442 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-08-12 19:19:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:43,443 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-08-12 19:19:43,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-08-12 19:19:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:19:43,461 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:43,461 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:43,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:19:43,662 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-08-12 19:19:43,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:43,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704031475] [2021-08-12 19:19:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:43,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704031475] [2021-08-12 19:19:43,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704031475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495704] [2021-08-12 19:19:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:43,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-08-12 19:19:43,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:19:43,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:19:43,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:19:43,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-08-12 19:19:43,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:19:43,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:19:43,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:19:43,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:19:43,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-08-12 19:19:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:43,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:43,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:43,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-12 19:19:43,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176199531] [2021-08-12 19:19:43,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:19:43,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:43,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:19:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:19:43,940 INFO L87 Difference]: Start difference. First operand 9972 states and 45025 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:47,559 INFO L93 Difference]: Finished difference Result 34807 states and 160322 transitions. [2021-08-12 19:19:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:19:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:19:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:47,689 INFO L225 Difference]: With dead ends: 34807 [2021-08-12 19:19:47,689 INFO L226 Difference]: Without dead ends: 24590 [2021-08-12 19:19:47,704 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:19:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24590 states. [2021-08-12 19:19:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24590 to 9804. [2021-08-12 19:19:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 4.534428236254208) internal successors, (44451), 9803 states have internal predecessors, (44451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-08-12 19:19:48,331 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-08-12 19:19:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:48,332 INFO L482 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-08-12 19:19:48,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-08-12 19:19:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:19:48,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:48,350 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:48,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:19:48,551 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:48,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:48,551 INFO L82 PathProgramCache]: Analyzing trace with hash 95025711, now seen corresponding path program 2 times [2021-08-12 19:19:48,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:48,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751041499] [2021-08-12 19:19:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:48,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:48,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751041499] [2021-08-12 19:19:48,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751041499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:48,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614009450] [2021-08-12 19:19:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:48,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:48,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:19:48,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:48,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:19:48,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:19:48,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:19:48,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:19:48,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-08-12 19:19:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:48,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614009450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:48,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:48,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:19:48,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091870354] [2021-08-12 19:19:48,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:48,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:48,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:48,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:48,890 INFO L87 Difference]: Start difference. First operand 9804 states and 44451 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:52,563 INFO L93 Difference]: Finished difference Result 32098 states and 147331 transitions. [2021-08-12 19:19:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:19:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:19:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:52,669 INFO L225 Difference]: With dead ends: 32098 [2021-08-12 19:19:52,669 INFO L226 Difference]: Without dead ends: 16159 [2021-08-12 19:19:52,688 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:19:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-08-12 19:19:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-08-12 19:19:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 4.493828399397892) internal successors, (44781), 9965 states have internal predecessors, (44781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-08-12 19:19:53,400 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-08-12 19:19:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:53,401 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-08-12 19:19:53,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-08-12 19:19:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:19:53,418 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:53,418 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:53,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:53,621 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:19:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1049367287, now seen corresponding path program 3 times [2021-08-12 19:19:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:53,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837121969] [2021-08-12 19:19:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:53,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837121969] [2021-08-12 19:19:53,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837121969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382553258] [2021-08-12 19:19:53,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:53,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:19:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:53,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:19:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:53,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:19:53,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:19:53,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:19:53,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:19:53,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-08-12 19:19:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:19:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382553258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:53,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:53,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:19:53,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71153545] [2021-08-12 19:19:53,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:53,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:53,918 INFO L87 Difference]: Start difference. First operand 9966 states and 44781 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:58,977 INFO L93 Difference]: Finished difference Result 38250 states and 176155 transitions. [2021-08-12 19:19:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:19:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:19:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:59,109 INFO L225 Difference]: With dead ends: 38250 [2021-08-12 19:19:59,109 INFO L226 Difference]: Without dead ends: 19645 [2021-08-12 19:19:59,129 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:19:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-08-12 19:19:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-08-12 19:19:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 4.496012611275964) internal successors, (48485), 10784 states have internal predecessors, (48485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-08-12 19:19:59,817 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-08-12 19:19:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:59,817 INFO L482 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-08-12 19:19:59,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-08-12 19:19:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:19:59,836 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:59,836 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:00,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:00,037 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:20:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1500175273, now seen corresponding path program 4 times [2021-08-12 19:20:00,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:00,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548883449] [2021-08-12 19:20:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:00,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548883449] [2021-08-12 19:20:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548883449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:00,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473986862] [2021-08-12 19:20:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:00,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:20:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:00,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-08-12 19:20:00,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:00,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:00,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:00,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-08-12 19:20:00,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-08-12 19:20:00,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:00,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:00,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:00,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-08-12 19:20:00,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:20:00,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:00,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:00,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:00,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-08-12 19:20:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:00,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473986862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:00,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:00,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-12 19:20:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642573117] [2021-08-12 19:20:00,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:20:00,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:20:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:20:00,381 INFO L87 Difference]: Start difference. First operand 10785 states and 48485 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:02,816 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-08-12 19:20:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:04,947 INFO L93 Difference]: Finished difference Result 29885 states and 135358 transitions. [2021-08-12 19:20:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:20:04,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:20:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:05,069 INFO L225 Difference]: With dead ends: 29885 [2021-08-12 19:20:05,069 INFO L226 Difference]: Without dead ends: 17348 [2021-08-12 19:20:05,087 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:20:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-08-12 19:20:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-08-12 19:20:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 4.473569679934718) internal successors, (49339), 11029 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-08-12 19:20:05,798 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-08-12 19:20:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:05,799 INFO L482 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-08-12 19:20:05,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-08-12 19:20:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:20:05,820 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:05,820 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:06,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 19:20:06,022 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:20:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1584459695, now seen corresponding path program 5 times [2021-08-12 19:20:06,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:06,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821962153] [2021-08-12 19:20:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:06,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821962153] [2021-08-12 19:20:06,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821962153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:06,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505010466] [2021-08-12 19:20:06,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:06,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:20:06,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:20:06,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:06,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-08-12 19:20:06,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:06,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:06,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:06,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-08-12 19:20:06,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:20:06,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:06,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:06,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:06,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-08-12 19:20:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:06,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505010466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:06,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:06,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:20:06,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034336528] [2021-08-12 19:20:06,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:20:06,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:20:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:20:06,496 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:12,083 INFO L93 Difference]: Finished difference Result 37386 states and 169708 transitions. [2021-08-12 19:20:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:20:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:20:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:12,218 INFO L225 Difference]: With dead ends: 37386 [2021-08-12 19:20:12,218 INFO L226 Difference]: Without dead ends: 20919 [2021-08-12 19:20:12,240 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:20:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20919 states. [2021-08-12 19:20:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20919 to 11315. [2021-08-12 19:20:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11315 states, 11314 states have (on average 4.472246773908432) internal successors, (50599), 11314 states have internal predecessors, (50599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-08-12 19:20:13,042 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-08-12 19:20:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:13,043 INFO L482 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-08-12 19:20:13,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-08-12 19:20:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-12 19:20:13,064 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:13,065 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:13,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:13,265 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:20:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:13,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1173646258, now seen corresponding path program 6 times [2021-08-12 19:20:13,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:13,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771666338] [2021-08-12 19:20:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:20:13,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:13,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771666338] [2021-08-12 19:20:13,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771666338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:13,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226821996] [2021-08-12 19:20:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:13,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:20:13,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:20:13,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:20:13,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226821996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:13,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:13,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 19:20:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149365236] [2021-08-12 19:20:13,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:20:13,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:13,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:20:13,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:20:13,428 INFO L87 Difference]: Start difference. First operand 11315 states and 50599 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:18,751 INFO L93 Difference]: Finished difference Result 42874 states and 201059 transitions. [2021-08-12 19:20:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:20:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-12 19:20:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:18,963 INFO L225 Difference]: With dead ends: 42874 [2021-08-12 19:20:18,963 INFO L226 Difference]: Without dead ends: 38168 [2021-08-12 19:20:18,982 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38168 states. [2021-08-12 19:20:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38168 to 27191. [2021-08-12 19:20:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27191 states, 27190 states have (on average 4.6368517837440235) internal successors, (126076), 27190 states have internal predecessors, (126076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27191 states to 27191 states and 126076 transitions. [2021-08-12 19:20:21,057 INFO L78 Accepts]: Start accepts. Automaton has 27191 states and 126076 transitions. Word has length 42 [2021-08-12 19:20:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:21,058 INFO L482 AbstractCegarLoop]: Abstraction has 27191 states and 126076 transitions. [2021-08-12 19:20:21,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 27191 states and 126076 transitions. [2021-08-12 19:20:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-12 19:20:21,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:21,117 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:21,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:20:21,318 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 19:20:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash 22210040, now seen corresponding path program 7 times [2021-08-12 19:20:21,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:21,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078782885] [2021-08-12 19:20:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:20:21,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:21,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078782885] [2021-08-12 19:20:21,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078782885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:21,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094188512] [2021-08-12 19:20:21,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:20:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:20:21,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094188512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:21,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:21,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-12 19:20:21,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877879863] [2021-08-12 19:20:21,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:20:21,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:21,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:20:21,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:20:21,459 INFO L87 Difference]: Start difference. First operand 27191 states and 126076 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:28,622 INFO L93 Difference]: Finished difference Result 57901 states and 268304 transitions. [2021-08-12 19:20:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-12 19:20:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:29,050 INFO L225 Difference]: With dead ends: 57901